Honors Review

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H Review
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1.
(1 point) Who
a.
b.
c.
d.
____
2.
(1 point) What
a.
b.
c.
d.
____
3.
4.
5.
6.
7.
8.
type of microscope can produce three-dimensional images of a cell’s surface?
transmission electron microscope
scanning electron microscope
simple light microscope
compound light microscope
(1 point) Colors
a.
b.
c.
d.
____
microscopes can reveal details
only in specimens that are still alive.
about the different colors of cell structures.
of cell structures only once they are stained.
1000 times smaller than those visible in light microscopes.
(1 point) Which
a.
b.
c.
d.
____
of these is NOT true of cells?
They are much like empty rooms.
They were first discovered in the 1600s.
They can be found in pond water.
They contain a huge array of working parts.
(1 point) Electron
a.
b.
c.
d.
____
of the following is NOT a principle of the cell theory?
Cells are the basic units of life.
All living things are made of cells.
Very few cells are able to reproduce.
All cells are produced from existing cells.
(1 point) Which
a.
b.
c.
d.
____
advance in technology made the discovery of cells possible?
the centrifuge
the particle accelerator
the ultraviolet light
the microscope
(1 point) Which
a.
b.
c.
d.
____
used a compound microscope to see chambers within cork and named them “cells”?
Anton van Leeuwenhoek
Robert Hooke
Matthias Schleiden
Rudolf Virchow
seen in images made from electron microscopes are
true to life.
the colors of electrons.
added to make certain structures easier to see.
added so scientists can trace living cells through the body.
(1 point) Looking
a.
b.
c.
d.
at a cell under a microscope, you note that it is a prokaryote. How do you know?
The cell lacks cytoplasm.
The cell lacks a cell membrane.
The cell lacks a nucleus.
The cell lacks genetic material.
____
9.
(1 point) Which
a.
b.
c.
d.
____ 10.
(1 point) Not
a.
b.
c.
d.
____ 11.
of the following enclose their DNA in a nucleus?
prokaryotes
bacteria
eukaryotes
viruses
all cells are alike. Which of the following is NOT a true statement about differences between cells?
Cells come in many different shapes.
Different kinds of cells are different sizes.
Some cells have a nucleus, but others do not.
Most cells have a membrane, but some do not.
(1 point) Which
a.
b.
c.
d.
of the following organisms are prokaryotes?
plants
animals
bacteria
fungi
Figure 7–1
____ 12.
(1 point) Which
a.
b.
c.
d.
____ 13.
(1 point) Which
a.
b.
c.
d.
____ 14.
of the following conclusions could you draw about the cell shown in Figure 7–1?
The cell is eukaryotic because it has a nucleus.
The cell is prokaryotic because it has a nucleus.
The cell is eukaryotic because it does not have a nucleus.
The cell is prokaryotic because it does not have a nucleus.
of the following is a function of the nucleus?
stores DNA
stores sugars
builds proteins
packages proteins
(1 point) Which
of the following best describes the relationship between the nucleus and the cytoplasm?
a.
b.
c.
d.
The cytoplasm is a fluid that fills the inside of the nucleus.
The cytoplasm is an organelle that is usually found near the nucleus.
The nucleus is an organelle that is surrounded by the cytoplasm.
The nucleus is a fluid and it mixes with the fluid cytoplasm.
____ 15.
(1 point) Which
of the following statements about the nucleus is NOT true?
a. The nucleus stores the coded instructions for making the cell’s proteins.
b. The nucleus usually contains a nucleolus region which is where ribosome assembly
begins.
c. The nucleus is the site of protein assembly.
d. The nucleus is surrounded by a nuclear envelope that lets materials in and out.
____ 16.
(1 point) Which
a.
b.
c.
d.
____ 17.
(1 point) Which
a.
b.
c.
d.
____ 18.
organelle breaks down organelles that are no longer useful?
Golgi apparatus
lysosome
endoplasmic reticulum
mitochondrion
of the following is a function of the cytoskeleton?
helps a cell keep its shape
contains DNA
surrounds the cell
helps make proteins
(1 point) Which
a.
b.
c.
d.
structures are involved in cell movement?
cytoplasm and ribosomes
nucleolus and nucleus
microtubules and microfilaments
chromosomes
Figure 7–2
____ 19.
(1 point) Which
structure in the cell shown in Figure 7–2 above stores materials, such as water, salts, proteins,
and carbohydrates?
a. structure A
b. structure B
c. structure C
d. structure D
____ 20.
(1 point) Which
a.
b.
c.
d.
____ 21.
structure makes proteins using coded instructions that come from the nucleus?
Golgi apparatus
mitochondrion
vacuole
ribosome
(1 point) Which
a.
b.
c.
d.
sequence correctly traces the path of a protein in the cell?
ribosome, endoplasmic reticulum, Golgi apparatus
ribosome, endoplasmic reticulum, chloroplast
endoplasmic reticulum, lysosome, Golgi apparatus
ribosome, Golgi apparatus, endoplasmic reticulum
Figure 7–3
____ 22.
(1 point) Which
structure in the cell shown in Figure 7–3 above modifies, sorts, and packages proteins and other
materials for storage or release from the cell?
a. structure A
b. structure B
c. structure C
d. structure D
____ 23.
(1 point) Which
organelle converts the chemical energy stored in food into compounds that are more convenient
for the cell to use?
a. chloroplast
b. Golgi apparatus
c. endoplasmic reticulum
d. mitochondrion
____ 24.
(1 point) Which
a.
b.
c.
d.
____ 25.
(1 point) Which
a.
b.
c.
d.
____ 26.
will NOT find a cell wall in which of these kinds of organisms?
plants
animals
fungi
bacteria
(1 point) Which
a.
b.
c.
d.
____ 30.
the cell membrane, the cell wall is
found in all organisms.
composed of a lipid bilayer.
selectively permeable.
a rigid structure.
(1 point) You
a.
b.
c.
d.
____ 29.
primary function of the cell wall is to
support and protect the cell.
store DNA.
direct the activities of the cell.
help the cell move.
(1 point) Unlike
a.
b.
c.
d.
____ 28.
organelle would you expect to find in plant cells but not animal cells?
mitochondrion
ribosome
chloroplast
smooth endoplasmic reticulum
(1 point) The
a.
b.
c.
d.
____ 27.
organelles are involved in energy conversion?
mitochondria and chloroplasts
mitochondria and ribosomes
smooth and rough endoplasmic reticulum
Golgi apparatus and chloroplasts
of the following structures serves as the cell’s boundary from its environment?
mitochondrion
cell membrane
chloroplast
channel protein
(1 point) Which
a.
b.
c.
d.
of the following is a function of the cell membrane?
breaks down lipids, carbohydrates, and proteins from foods
stores water, salt, proteins, and carbohydrates
keeps the cell wall in place
regulates the movement of materials into and out of the cell
____ 31.
(1 point) The
cell membrane contains channels and pumps that help move materials from one side to the other.
What are these channels and pumps made of?
a. carbohydrates
b. lipids
c. bilipids
d. proteins
____ 32.
(1 point) Diffusion
occurs because
a. molecules are attracted to one another.
b. molecules constantly move and collide with each other.
c. cellular energy forces molecules to collide with each other.
d. cellular energy pumps molecules across the cell membrane.
____ 33.
(1 point) During
diffusion, when the concentration of molecules on both sides of a membrane is the same, the
molecules will
a. move across the membrane to the outside of the cell.
b. stop moving across the membrane.
c. continue to move across the membrane in both directions.
d. move across the membrane to the inside of the cell.
____ 34.
(1 point) The
a.
b.
c.
d.
____ 35.
(1 point) An
a.
b.
c.
d.
____ 36.
diffusion of water across a selectively permeable membrane is called
osmotic pressure.
osmosis.
pinocytosis.
active transport.
animal cell that is surrounded by fresh water will burst because the osmotic pressure causes
water to move into the cell.
water to move out of the cell.
solutes to move into the cell.
solutes to move out of the cell.
(1 point) Which
a.
b.
c.
d.
means of particle transport requires input of energy from the cell?
diffusion
osmosis
facilitated diffusion
active transport
Figure 7–4
____ 37.
(1 point) Which
a. diffusion
means of particle transport is shown in Figure 7–4 above?
b. osmosis
c. facilitated diffusion
d. active transport
Figure 7–5
____ 38.
(1 point) Which
a.
b.
c.
d.
____ 39.
(1 point) Which
a.
b.
c.
d.
____ 40.
of the following activities is NOT a way that unicellular organisms maintain homeostasis?
reproduction
growth
cell specialization
response to the environment
(1 point) Which
a.
b.
c.
d.
____ 41.
means of particle transport is shown in Figure 7–5 above?
endocytosis
exocytosis
facilitated diffusion
protein pump
term describes the relatively constant internal physical conditions of an organism?
cell specialization
homeostasis
organ system
unicellularity
(1 point) The
a.
b.
c.
d.
cells of unicellular organisms are
specialized to perform different tasks.
larger than those of multicellular organisms.
able to carry out all of the functions necessary for life.
unable to respond to changes in their environment.
____ 42.
(1 point) Which
a.
b.
c.
d.
____ 43.
(1 point) A
a.
b.
c.
d.
____ 44.
group of similar cells that perform a particular function is called
an organ.
an organ system.
a tissue.
a division of labor.
(1 point) An
a.
b.
c.
d.
____ 45.
of the following is an example of an organ?
heart
epithelial tissue
digestive system
nerve cell
organ system is a group of organs that
are made up of similar cells.
are made up of similar tissues.
work together to perform a specific function.
work together to perform all the functions in a multicellular organism.
(1 point) Which
list represents the levels of organization in a multicellular organism from the simplest level to
the most complex level?
a. cell, tissue, organ system, organ
b. organ system, organ, tissue, cell
c. tissue, organ, organ system, cell
d. cell, tissue, organ, organ system
Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
____
1.
(1 point) Viruses
are not made up of cells. Therefore, viruses are not considered to be living things.
_________________________
____
2.
(1 point) A
____
3.
(1 point) Prokaryotic
____
4.
(1 point) The
____
5.
(1 point) Flagella
____
6.
(1 point) Cilia
scanning electron microscope allows light to pass through a specimen and focuses it using two
lenses to form an image. _________________________
and eukaryotic cells are surrounded by a thin, flexible barrier called a cell membrane.
_________________________
assembly of ribosomes begins in a small dense structure called the chromatin.
_________________________
made up of microtubules help organize cell division. _________________________
and flagella are made of protein filaments called endoplasmic reticulum.
_________________________
Figure 7–6
____
7.
(1 point) Structure
D represented in Figure 7–6 is the smooth endoplasmic reticulum.
_________________________
____
8.
(1 point) Ribosomes
____
9.
(1 point) Plant
that synthesize proteins are found on the smooth endoplasmic reticulum.
_________________________
cells have chloroplasts but not mitochondria. _________________________
____ 10.
(1 point) Water,
carbon dioxide, oxygen, and some other substances can pass through the cell wall.
_________________________
____ 11.
(1 point) Once
____ 12.
(1 point) Proteins
____ 13.
(1 point) Moving
____ 14.
(1 point) A
____ 15.
(1 point) There
equilibrium is reached, roughly equal numbers of molecules move in either direction across a
semipermeable membrane, and there is no further change in concentration on either side of the membrane.
_________________________
called aquaporins are important to the movement of water through cell membranes. These
proteins participate in active transport. _________________________
materials from an area of low concentration to an area of high concentration requires active
transport. _________________________
cell in a multicellular organism must be able to carry out all of the functions necessary for life in
order for the organism to survive. _________________________
is a division of labor among the cells of multicellular organisms. _________________________
Completion
Complete each statement.
1.
(1 point) According
2.
(1 point) Electrons
3.
(1 point) Depending
to the cell theory, all cells come from existing ____________________.
pass through thin slices of cells or tissues and produce flat, two-dimensional images in
____________________ electron microscopy.
on whether they have a ____________________, unicellular organisms are classified as
either eukaryotes or prokaryotes.
Figure 7–7
4.
(1 point) The
small, dense region indicated in Figure 7–7 by the letter D is called the ____________________.
5.
(1 point) Most
of the time, the cell’s genetic information is found as threadlike _________________________
in the cell’s nucleus.
Figure 7–6
6.
(1 point) The
storage structure indicated in Figure 7–6 by the letter F is a(an) ____________________ .
7.
(1 point) Cells
8.
(1 point) In
9.
(1 point) The
that need to make a lot of protein are expected to have a large number of ________________.
plants, ____________________ capture energy from sunlight and convert it into chemical energy,
whereas ____________________ convert chemical energy into compounds that are convenient for the cell to
use.
cell takes in food and water and eliminates wastes through its selectively permeable
_________________________.
10.
(1 point) Molecules
tend to move from an area where they are more concentrated to an area where they are less
concentrated. This process is called ____________________.
11.
(1 point) Large
molecules, such as glucose, that cannot cross the lipid bilayer can still move across the
membrane through a type of passive transport called _________________________.
12.
(1 point) Some
materials can move across the cell membrane against a concentration gradient by
____________________.
13.
(1 point) A
14.
(1 point) The
15.
(1 point) Cells
cell’s relatively constant internal physical and chemical conditions are called
_________________________.
cells in a multicellular organism have specific jobs. This is called cell
_________________________.
within a multicellular organism communicate by chemical signals. In order to receive and
respond to a certain chemical signal, a cell must have a ________________ for that chemical.
Short Answer
1.
(6 points) What
2.
(6 points) What
does the cell theory say?
kinds of microscopes could you use to look at the structure of DNA? Could you study the
structure of DNA in a living specimen? Why or why not?
Figure 7–8
3.
(6 points) Is
the cell in Figure 7–8 above a prokaryote or a eukaryote? What features help you determine your
answer?
4.
(6 points) How
do prokaryotes and eukaryotes differ?
5.
(6 points) How
is the nucleus of a cell like the main office of a large factory?
6.
(6 points) List
two functions of the cytoskeleton.
Figure 7–7
7.
(6 points) Identify
each of the cell structures indicated in Figure 7–7. Use these terms: nucleus, mitochondrion,
ribosome, cell membrane, smooth endoplasmic reticulum, rough endoplasmic reticulum, nucleolus, Golgi
apparatus, cytoplasm.
Figure 7–9
structures in the cells shown in Figure 7–9 above are responsible for meeting the cells’ energy
needs? Based on the presence or absence of these structures, identify which cell is a plant cell.
8.
(6 points) Which
9.
(6 points) What
advantages do cell walls provide plant cells that contact fresh water?
10.
(6 points) What
would happen if a cell’s membrane became impermeable?
11.
(6 points) Suppose
12.
(6 points) Explain,
you add a teaspoon of sugar to a cup of coffee, and the sugar molecules disperse themselves
throughout the hot coffee. What process has occurred? How do you know?
water.
in terms of osmosis, why a raisin placed in a cup of pure water overnight will puff up with
13.
(6 points) What
would happen to an animal cell with an internal salt concentration of 0.8% if it were placed in a
salt solution with a concentration of 0.2%? Why?
14.
(6 points) How
15.
(6 points) List
are endocytosis and exocytosis similar? How are they different?
the four levels of organization in a multicellular organism in order from simplest to most
complex.
Science Skills
A student put together the experimental setup shown below. The selectively permeable membrane is
permeable to water, but not the solute shown.
Figure 7–10
1.
(1 point) Interpret
2.
(1 point) Compare
3.
(1 point) Predict
4.
(1 point) Predict
Visuals Describe the experimental setup shown in Figure 7–10.
and Contrast How does the solution on Side A of the apparatus shown in Figure 7–10 differ
from the solution on Side B?
Look at Figure 7–10. Describe the movement of water in the experimental setup. What will
happen to the concentration of water over time?
What will the apparatus shown in Figure 7–10 look like when equilibrium is reached?
5.
(1 point) Predict
Once equilibrium is reached in the apparatus shown in Figure 7–10, will the water molecules
continue to move? Explain your answer.
Figure 7–11
6.
(1 point) Interpret
Visuals Which drawing in Figure 7–11, I or II, contains structures that carry out
photosynthesis? What is this structure labeled in the diagram?
7.
(1 point) Compare
8.
(1 point) Compare
9.
(1 point) Interpret
Visuals Which organelle is labeled K in Figure 7–11? What is the function of this organelle?
10.
(1 point) Interpret
Visuals Do the drawings in Figure 7–11 represent prokaryotes or eukaryotes? How do you
and Contrast Look at Figure 7–11. Which structure in drawing I corresponds to structure L
in drawing II? What is the name of this structure?
and Contrast Which three structures are found in drawing II of Figure 7–11 but not in
drawing I? What are the names of these structures?
know?
The experimental setup below shows an osmometer. An osmometer is a device used to measure the amount of
osmotic pressure exerted by a liquid passing through a semipermeable membrane. The graph shows one lab
group’s results compared with the results of the rest of the class combined. Line A represents the results of the
single lab group. Line B represents the data of the rest of the class.
Figure 7–12
11.
(1 point) Compare
and Contrast Look at the graph in Figure 7–12. Compare the lab results of the single lab
group with those collected by the rest of the class.
12.
(1 point) Analyze
13.
(1 point) Evaluate
Data Which results in the graph in Figure 7–12 are more likely to be accurate, those
represented by line A or by line B? Why?
and Revise What could account for the difference in lines A and B in the graph in Figure
7–12?
14.
(1 point) Predict
Look at the graph in Figure 7–12. How would the results differ if a sucrose solution with twice
the concentration of the one used to collect the results represented by line A were used?
15.
(1 point) Calculate
How might you use the graph in Figure 7–12 to calculate the rate of osmosis observed?
What units would you use to report the rate?
Essay
1.
(20 points) Summarize
biology.
three statements from the cell theory. Explain the significance of the cell theory to
2.
(20 points) Describe
the cell membrane, cell wall, nucleus, and cytoplasm. Which of these structures are you
likely to find in a prokaryotic cell? Eukaryotic cell? Plant cell? Animal cell?
3.
(20 points) Distinguish
between microtubules and microfilaments. Describe two functions of each kind of
structure.
4.
(20 points) Compare
5.
(20 points) Why
and contrast the structure and function of the cell wall with that of the cell membrane.
is the cell membrane sometimes compared to mosaic art?
Figure 7-13
6.
(20 points) The
diagrams in Figure 7-13 above show a normal blood cell before and after it is placed in a
solution. Describe what could cause the cell to react the way that it did.
7.
(20 points) What
8.
(20 points) How
9.
(20 points) Compare
are aquaporins? How are they important to cells?
do facilitated diffusion and active transport differ? Is osmosis an example of facilitated diffusion
or active transport?
specialization.
a cell from a unicellular organism with a cell from a multicellular organism in terms of cell
10.
(20 points) Discuss
the levels of organization in multicellular organisms and explain why these levels are not
used to describe unicellular organisms.
H Review
Answer Section
MULTIPLE CHOICE
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B
PTS: 1
DIF: L1
REF:
7.1.1 State the cell theory.
STA: MA.SIS2.6 TOP:
knowledge
D
PTS: 1
DIF: L1
REF:
7.1.1 State the cell theory.
STA: MA.SIS2.6 TOP:
comprehension
C
PTS: 1
DIF: L2
REF:
7.1.1 State the cell theory.
STA: MA.SIS2.6 TOP:
comprehension
A
PTS: 1
DIF: L3
REF:
7.1.1 State the cell theory.
STA: MA.SIS2.6 TOP:
synthesis
D
PTS: 1
DIF: L1
REF:
7.1.2 Describe how the different types of microscopes work.
MA.SIS2.6 BLM: knowledge
B
PTS: 1
DIF: L2
REF:
7.1.2 Describe how the different types of microscopes work.
MA.SIS2.6 TOP: Foundation Edition
BLM:
C
PTS: 1
DIF: L2
REF:
7.1.2 Describe how the different types of microscopes work.
MA.SIS2.6 TOP: Foundation Edition
BLM:
C
PTS: 1
DIF: L2
REF:
7.1.3 Distinguish between prokaryotes and eukaryotes.
STA:
Foundation Edition
BLM: application
C
PTS: 1
DIF: L1
REF:
7.1.3 Distinguish between prokaryotes and eukaryotes.
STA:
Foundation Edition
BLM: knowledge
D
PTS: 1
DIF: L2
REF:
7.1.3 Distinguish between prokaryotes and eukaryotes.
STA:
Foundation Edition
BLM: comprehension
C
PTS: 1
DIF: L2
REF:
7.1.3 Distinguish between prokaryotes and eukaryotes.
STA:
Foundation Edition
BLM: comprehension
A
PTS: 1
DIF: L3
REF:
7.1.3 Distinguish between prokaryotes and eukaryotes.
STA:
application
A
PTS: 1
DIF: L1
REF:
7.2.1 Describe the structure and function of the cell nucleus.
MA.B.1.2.1 TOP: Foundation Edition
BLM:
C
PTS: 1
DIF: L2
REF:
7.2.1 Describe the structure and function of the cell nucleus.
MA.B.1.2.1 TOP: Foundation Edition
BLM:
C
PTS: 1
DIF: L3
REF:
p. 190
Foundation Edition
p. 191
Foundation Edition
p. 191
Foundation Edition
p. 191
Foundation Edition
p. 192
p. 192
comprehension
p. 191
comprehension
p. 193
MA.B.1.2.1 | MA.B.1.2.2
p. 194
MA.B.1.2.1 | MA.B.1.2.2
p. 194
MA.B.1.2.1 | MA.B.1.2.2
p. 194
MA.B.1.2.1 | MA.B.1.2.2
p. 194
MA.B.1.2.1 | MA.B.1.2.2
p. 197
knowledge
p. 196 | p. 197
synthesis
p. 197
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7.2.1 Describe the structure and function of the cell nucleus.
MA.B.1.2.1 BLM: analysis
B
PTS: 1
DIF: L1
REF: p. 198
7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
MA.B.1.1.2 | MA.B.1.2.1
TOP: Foundation Edition
comprehension
A
PTS: 1
DIF: L1
REF: p. 199
7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
MA.B.1.1.2 | MA.B.1.2.1
TOP: Foundation Edition
knowledge
C
PTS: 1
DIF: L2
REF: p. 199
7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
MA.B.1.1.2 | MA.B.1.2.1
TOP: Foundation Edition
application
C
PTS: 1
DIF: L3
REF: p. 198
7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
MA.B.1.1.2 | MA.B.1.2.1
BLM: application
D
PTS: 1
DIF: L1
REF: p. 200
7.2.3 Identify the role of ribosomes, endoplasmic reticulum, and Golgi apparatus in making proteins.
MA.B.1.2.1 TOP: Foundation Edition
BLM: comprehension
A
PTS: 1
DIF: L3
REF: p. 200 | p. 201
7.2.3 Identify the role of ribosomes, endoplasmic reticulum, and Golgi apparatus in making proteins.
MA.B.1.2.1 BLM: application
A
PTS: 1
DIF: L3
REF: p. 201
7.2.3 Identify the role of ribosomes, endoplasmic reticulum, and Golgi apparatus in making proteins.
MA.B.1.2.1 BLM: application
D
PTS: 1
DIF: L1
REF: p. 202
7.2.4 Describe the function of the chloroplasts and mitochondria in the cell.
MA.B.1.2.1 TOP: Foundation Edition
BLM: knowledge
A
PTS: 1
DIF: L3
REF: p. 202
7.2.4 Describe the function of the chloroplasts and mitochondria in the cell.
MA.B.1.2.1 BLM: synthesis
C
PTS: 1
DIF: L2
REF: p. 202
7.2.4 Describe the function of the chloroplasts and mitochondria in the cell.
MA.B.1.2.1 TOP: Foundation Edition
BLM: comprehension
A
PTS: 1
DIF: L1
REF: p. 203
7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
Foundation Edition
BLM: knowledge
D
PTS: 1
DIF: L3
REF: p. 204
7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
analysis
B
PTS: 1
DIF: L2
REF: p. 203
7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
knowledge
B
PTS: 1
DIF: L1
REF: p. 203
7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
Foundation Edition
BLM: knowledge
D
PTS: 1
DIF: L1
REF: p. 204
7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
TOP:
31. ANS:
OBJ:
BLM:
32. ANS:
OBJ:
33. ANS:
OBJ:
BLM:
34. ANS:
OBJ:
BLM:
35. ANS:
OBJ:
36. ANS:
OBJ:
BLM:
37. ANS:
OBJ:
BLM:
38. ANS:
OBJ:
BLM:
39. ANS:
OBJ:
STA:
BLM:
40. ANS:
OBJ:
STA:
BLM:
41. ANS:
OBJ:
STA:
42. ANS:
OBJ:
STA:
BLM:
43. ANS:
OBJ:
STA:
BLM:
44. ANS:
OBJ:
STA:
BLM:
45. ANS:
OBJ:
STA:
Foundation Edition
BLM: comprehension
D
PTS: 1
DIF: L3
REF:
7.2.5 Describe the function of the cell membrane.
STA:
synthesis
B
PTS: 1
DIF: L2
REF:
7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM:
C
PTS: 1
DIF: L2
REF:
7.3.1 Describe passive transport.
STA: MA.B.1.2.1 TOP:
comprehension
B
PTS: 1
DIF: L1
REF:
7.3.1 Describe passive transport.
STA: MA.B.1.2.1 TOP:
knowledge
A
PTS: 1
DIF: L2
REF:
7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM:
D
PTS: 1
DIF: L2
REF:
7.3.2 Describe active transport.
STA: MA.B.1.2.1 TOP:
comprehension
D
PTS: 1
DIF: L2
REF:
7.3.2 Describe active transport.
STA: MA.B.1.2.1 TOP:
application
A
PTS: 1
DIF: L2
REF:
7.3.2 Describe active transport.
STA: MA.B.1.2.1 TOP:
application
C
PTS: 1
DIF: L2
REF:
7.4.1 Explain how unicellular organisms maintain homeostasis.
MA.B.1.2.1 | MA.B.1.2.2
TOP: Foundation Edition
comprehension
B
PTS: 1
DIF: L1
REF:
7.4.1 Explain how unicellular organisms maintain homeostasis.
MA.B.1.2.1 | MA.B.1.2.2
TOP: Foundation Edition
knowledge
C
PTS: 1
DIF: L2
REF:
7.4.1 Explain how unicellular organisms maintain homeostasis.
MA.B.1.2.1 | MA.B.1.2.2
BLM: comprehension
A
PTS: 1
DIF: L2
REF:
7.4.2 Explain how multicellular organism maintain homeostasis.
MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
TOP:
application
C
PTS: 1
DIF: L1
REF:
7.4.2 Explain how multicellular organism maintain homeostasis.
MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
TOP:
knowledge
C
PTS: 1
DIF: L1
REF:
7.4.2 Explain how multicellular organism maintain homeostasis.
MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
TOP:
comprehension
D
PTS: 1
DIF: L3
REF:
7.4.2 Explain how multicellular organism maintain homeostasis.
MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
BLM:
p. 204
MA.B.1.2.1
p. 209
comprehension
p. 209
Foundation Edition
p. 210
Foundation Edition
p. 211
application
p. 212
Foundation Edition
p. 212
Foundation Edition
p. 213
Foundation Edition
p. 214
p. 214
p. 214
p. 216
Foundation Edition
p. 216
Foundation Edition
p. 216
Foundation Edition
p. 216
analysis
MODIFIED TRUE/FALSE
1. ANS:
REF:
TOP:
2. ANS:
T
PTS: 1
p. 191
OBJ: 7.1.1 State the cell theory.
Foundation Edition
BLM: application
F, light
PTS:
OBJ:
STA:
3. ANS:
REF:
STA:
BLM:
4. ANS:
1
DIF: L2
REF: p. 191
7.1.2 Describe how the different types of microscopes work.
MA.SIS2.6 TOP: Foundation Edition
BLM: comprehension
T
PTS: 1
DIF: L1
p. 193
OBJ: 7.1.3 Distinguish between prokaryotes and eukaryotes.
MA.B.1.2.1 | MA.B.1.2.2
TOP: Foundation Edition
knowledge
F, nucleolus
PTS:
OBJ:
STA:
5. ANS:
1
DIF: L2
REF: p. 197
7.2.1 Describe the structure and function of the cell nucleus.
MA.B.1.2.1 BLM: comprehension
F, centrioles
PTS:
OBJ:
STA:
BLM:
6. ANS:
1
DIF: L2
REF: p. 199
7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
MA.B.1.1.2 | MA.B.1.2.1
TOP: Foundation Edition
comprehension
F, microtubules
PTS:
OBJ:
STA:
BLM:
7. ANS:
1
DIF: L2
REF: p. 199
7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
MA.B.1.1.2 | MA.B.1.2.1
TOP: Foundation Edition
comprehension
F, rough
PTS:
OBJ:
STA:
8. ANS:
1
DIF: L2
REF: p. 200
7.2.3 Identify the role of ribosomes, endoplasmic reticulum, and Golgi apparatus in making proteins.
MA.B.1.2.1 BLM: application
F, rough
PTS:
OBJ:
STA:
9. ANS:
1
DIF: L2
REF: p. 200
7.2.3 Identify the role of ribosomes, endoplasmic reticulum, and Golgi apparatus in making proteins.
MA.B.1.2.1 TOP: Foundation Edition
BLM: comprehension
F, and
PTS:
OBJ:
STA:
10. ANS:
REF:
DIF: L2
STA: MA.SIS2.6
1
DIF: L3
REF: p. 202
7.2.4 Describe the function of the chloroplasts and mitochondria in the cell.
MA.B.1.2.1 BLM: synthesis
T
PTS: 1
DIF: L2
p. 205
OBJ: 7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1 TOP: Foundation Edition
11. ANS: T
PTS: 1
REF: p. 209
OBJ: 7.3.1 Describe passive transport.
BLM: comprehension
12. ANS: F
passive transport
facilitated diffusion
osmosis
BLM: comprehension
DIF: L2
STA: MA.B.1.2.1
PTS:
STA:
13. ANS:
REF:
BLM:
14. ANS:
1
DIF: L2
REF: p. 210
MA.B.1.2.1 TOP: Foundation Edition
T
PTS: 1
p. 212
OBJ: 7.3.2 Describe active transport.
synthesis
F, unicellular
OBJ:
BLM:
DIF:
STA:
PTS:
OBJ:
STA:
BLM:
15. ANS:
REF:
STA:
1
DIF: L2
REF: p. 214
7.4.1 Explain how unicellular organisms maintain homeostasis.
MA.B.1.2.1 | MA.B.1.2.2
TOP: Foundation Edition
synthesis
T
PTS: 1
DIF: L2
p. 215
OBJ: 7.4.2 Explain how multicellular organism maintain homeostasis.
MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
BLM: comprehension
7.3.1 Describe passive transport.
comprehension
L3
MA.B.1.2.1
COMPLETION
1. ANS: cells
PTS: 1
DIF: L2
REF: p. 191
STA: MA.SIS2.6 TOP: Foundation Edition
2. ANS: transmission
OBJ: 7.1.1 State the cell theory.
BLM: comprehension
PTS:
OBJ:
STA:
3. ANS:
1
DIF: L2
REF: p. 192
7.1.2 Describe how the different types of microscopes work.
MA.SIS2.6 TOP: Foundation Edition
BLM: comprehension
nucleus
PTS:
OBJ:
BLM:
4. ANS:
1
DIF: L3
REF: p. 194
7.1.3 Distinguish between prokaryotes and eukaryotes.
synthesis
nucleolus
PTS:
OBJ:
STA:
5. ANS:
1
DIF: L1
REF: p. 196
7.2.1 Describe the structure and function of the cell nucleus.
MA.B.1.2.1 TOP: Foundation Edition
BLM: knowledge
chromosomes
STA: MA.B.1.2.1 | MA.B.1.2.2
PTS: 1
DIF: L2
REF: p. 197
OBJ: 7.2.1 Describe the structure and function of the cell nucleus.
STA: MA.B.1.2.1 BLM: comprehension
6. ANS: vacuole or central vacuole
PTS:
OBJ:
STA:
7. ANS:
1
DIF: L3
REF: p. 198
7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
MA.B.1.1.2 | MA.B.1.2.1
BLM: synthesis
ribosomes
PTS:
OBJ:
STA:
8. ANS:
1
DIF: L2
REF: p. 200
7.2.3 Identify the role of ribosomes, endoplasmic reticulum, and Golgi apparatus in making proteins.
MA.B.1.2.1 TOP: Foundation Edition
BLM: analysis
chloroplasts, mitochondria
PTS:
OBJ:
STA:
9. ANS:
1
DIF: L3
REF: p. 202
7.2.4 Describe the function of the chloroplasts and mitochondria in the cell.
MA.B.1.2.1 BLM: synthesis
cell membrane
PTS:
OBJ:
TOP:
10. ANS:
1
DIF: L2
REF: p. 204
7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
Foundation Edition
BLM: comprehension
diffusion
PTS: 1
DIF: L1
STA: MA.B.1.2.1 BLM: knowledge
11. ANS: facilitated diffusion
REF: p. 208
OBJ: 7.3.1 Describe passive transport.
PTS: 1
DIF: L3
STA: MA.B.1.2.1 BLM: synthesis
12. ANS: active transport
REF: p. 209
OBJ: 7.3.1 Describe passive transport.
PTS: 1
STA: MA.B.1.2.1
13. ANS: homeostasis
DIF: L2
REF: p. 212
TOP: Foundation Edition
OBJ: 7.3.2 Describe active transport.
BLM: comprehension
PTS:
OBJ:
STA:
BLM:
14. ANS:
1
DIF: L1
REF: p. 214
7.4.1 Explain how unicellular organisms maintain homeostasis.
MA.B.1.2.1 | MA.B.1.2.2
TOP: Foundation Edition
knowledge
specialization
PTS:
OBJ:
STA:
BLM:
15. ANS:
1
DIF: L1
REF: p. 215
7.4.2 Explain how multicellular organism maintain homeostasis.
MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
TOP: Foundation Edition
knowledge
receptor
PTS: 1
DIF: L2
REF: p. 216
OBJ: 7.4.2 Explain how multicellular organism maintain homeostasis.
STA: MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
TOP: Foundation Edition
BLM: comprehension
SHORT ANSWER
1. ANS:
The cell theory says that all living things are composed of cells. It also says that cells are the basic units of
structure and function in living things and that new cells come from existing cells.
PTS: 6
DIF: L1
REF: p. 191
OBJ: 7.1.1 State the cell theory.
STA: MA.SIS2.6 TOP: Foundation Edition
BLM: knowledge
2. ANS:
DNA is too small to see with a light microscope, so an electron microscope is needed to examine its structure.
Electron microscopes cannot be used to look at living specimens, so the structure of DNA cannot be studied
in a living specimen.
PTS: 6
DIF: L3
REF: p. 191 | p. 193
OBJ: 7.1.2 Describe how the different types of microscopes work.
STA: MA.SIS2.6 BLM: application
3. ANS:
This cell is a prokaryote. It has a cell wall, indicated by the letter B, and its DNA, indicated by the letter C, is
not enclosed in a nucleus.
PTS: 6
DIF: L3
REF: p. 194
OBJ: 7.1.3 Distinguish between prokaryotes and eukaryotes.
STA: MA.B.1.2.1 | MA.B.1.2.2
BLM: evaluation
4. ANS:
Prokaryotes are generally simpler and smaller than eukaryotes, whereas eukaryotes enclose their DNA in a
nucleus and have other specialized organelles.
PTS: 6
DIF: L2
REF: p. 194
OBJ: 7.1.3 Distinguish between prokaryotes and eukaryotes.
STA: MA.B.1.2.1 | MA.B.1.2.2
TOP: Foundation Edition
BLM: analysis
5. ANS:
The nucleus is the control center of the cell and contains nearly all the cell’s DNA, which gives the cell the
instructions it needs to make proteins and other molecules.
PTS: 6
DIF: L2
REF: p. 197
OBJ: 7.2.1 Describe the structure and function of the cell nucleus.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: analysis
6. ANS:
The cytoskeleton helps the cell maintain its shape and internal organization. It is also involved in many forms
of cell movement.
PTS: 6
DIF: L1
REF: p. 199
OBJ: 7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
STA: MA.B.1.1.2 | MA.B.1.2.1
TOP: Foundation Edition
BLM: knowledge
7. ANS:
(A) rough endoplasmic reticulum; (B) cytoplasm; (C) smooth endoplasmic reticulum; (D) nucleolus; (E)
nucleus; (F) mitochondrion; (G) Golgi apparatus; (H) ribosome; (I) cell membrane
PTS: 6
DIF: L2
REF: p. 196 | p. 202
OBJ: 7.2.3 Identify the role of ribosomes, endoplasmic reticulum, and Golgi apparatus in making proteins.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: application
8. ANS:
The structure identified with the letter E is a chloroplast, which captures energy from sunlight and converts it
into chemical energy. The structures identified with the letter D are mitochondria, which convert chemical
energy into compounds more convenient for the cell to use. The cell with the chloroplasts is a plant cell.
PTS: 6
DIF: L2
REF: p. 202
OBJ: 7.2.4 Describe the function of the chloroplasts and mitochondria in the cell.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: evaluation
9. ANS:
Cell walls protect the plant cells from expanding even under tremendous osmotic pressure.
PTS: 6
DIF: L3
REF: p. 211
OBJ: 7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
BLM: synthesis
10. ANS:
The cell would die because needed nutrients, such as food and water, could not get inside the cell and wastes
would accumulate inside the cell.
PTS: 6
DIF: L3
REF: p. 204 | p. 205
OBJ: 7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
BLM: evaluation
11. ANS:
Diffusion has occurred; because diffusion is the movement of a substance from an area of high concentration
to an area of lower concentration.
PTS: 6
DIF: L2
REF: p. 208
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: application
12. ANS:
Because the concentration of water in the cup is greater than the concentration of water in the raisin, water
will flow from the cup into the raisin.
PTS: 6
DIF: L3
REF: p. 208 | p. 210
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: application
13. ANS:
The cell would swell and burst, because the 0.2% salt solution is hypotonic with respect to the cell, causing a
net movement of water into the cell.
PTS: 6
DIF: L3
REF: p. 210 | p. 211
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: synthesis
14. ANS:
Both are forms of active transport of large molecules carried out by movements of the cell membrane.
Endocytosis involves taking material into the cell, whereas exocytosis involves moving material out of the
cell.
PTS: 6
STA: MA.B.1.2.1
DIF: L2
REF: p. 213
TOP: Foundation Edition
OBJ: 7.3.2 Describe active transport.
BLM: analysis
15. ANS:
cell, tissue, organ, organ system
PTS:
OBJ:
STA:
BLM:
6
DIF: L1
REF: p. 216
7.4.2 Explain how multicellular organism maintain homeostasis.
MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
TOP: Foundation Edition
knowledge
SCIENCE SKILLS
1. ANS:
The experimental setup shows a solution with differing concentrations of solute separated by a selectively
permeable membrane. The membrane is permeable to water but not the solute.
PTS: 1
DIF: L2
REF: p. 208 | p. 210
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: analysis
2. ANS:
The solution on Side A has fewer solute particles than the solution on Side B. Both solutions have the same
amount of water, so the solution on Side A is hypotonic compared to the solution on Side B.
PTS: 1
DIF: L2
REF: p. 210
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: analysis
3. ANS:
The membrane is permeable to water so water can cross the membrane in both directions. Over time, there
will be a net movement of water toward Side B, which has a higher concentration of solute particles.
PTS: 1
DIF: L2
REF: p. 208 | p. 210
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: application
4. ANS:
At equilibrium, Side A will have less water than Side B and the concentration of solute molecules will be
equal on either side of the selectively permeable membrane.
PTS: 1
DIF: L2
REF: p. 208 | p. 210
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: analysis
5. ANS:
Yes, the water molecules will continue to move across the membrane; however, there will not be a net
movement from one side to the other.
PTS: 1
DIF: L2
REF: p. 208 | p. 210
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: application
6. ANS:
Drawing II—a plant cell—contains the structure described (a chloroplast). The structure is labeled N.
PTS: 1
DIF: L1
REF: p. 202
OBJ: 7.2.4 Describe the function of the chloroplasts and mitochondria in the cell.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: knowledge
7. ANS:
Structure I. They both represent the cell membrane.
PTS: 1
DIF: L3
REF: p. 200
OBJ: 7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
BLM: analysis
8. ANS:
Structures J, N, and O. Structure J is the cell wall, structure N is a chloroplast, and structure O is a vacuole.
PTS: 1
DIF: L3
REF: p. 203
OBJ: 7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
STA: MA.B.1.1.2 | MA.B.1.2.1
BLM: analysis
9. ANS:
The organelle labeled K is the nucleus. The nucleus stores DNA and directs the activities of the cell.
PTS: 1
DIF: L1
REF: p. 197
OBJ: 7.2.1 Describe the structure and function of the cell nucleus.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: knowledge
10. ANS:
Both drawings represent eukaryotes, as shown by the presence of a nucleus.
PTS: 1
DIF: L2
REF: p. 193
OBJ: 7.1.3 Distinguish between prokaryotes and eukaryotes.
STA: MA.B.1.2.1 | MA.B.1.2.2
TOP: Foundation Edition
BLM: application
11. ANS:
Line A shows that the single group’s results are quite different from the results of the rest of the class. Over a
half-hour period, the lab group found that the solution traveled 25 mm, whereas the rest of the class found a
distance of only 12 mm over the same period of time. The distance traveled in the lab group’s data also kept
increasing, whereas the class’ data leveled out at about 10 minutes.
PTS: 1
DIF: L2
REF: p. 210 | p. 211
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: analysis
12. ANS:
The rest of the class’s results (line B) are more likely to be accurate because they represent a larger sample
size.
PTS: 1
DIF: L3
REF: p. 210 | p. 211
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: evaluation
13. ANS:
The lab group (line A) might have used a more concentrated solution of sucrose or a membrane with a
different permeability.
PTS: 1
DIF: L3
REF: p. 210 | p. 211
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: evaluation
14. ANS:
The more concentrated the solution, the longer distance the solution will travel over the same period of time.
Thus, a more concentrated solution would produce a longer distance.
PTS: 1
DIF: L3
REF: p. 210 | p. 211
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 BLM: synthesis
15. ANS:
The rate of osmosis could be calculated by dividing the distance traveled by time. The units would be
mm/min.
PTS: 1
DIF: L3
OBJ: 7.3.1 Describe passive transport.
REF: p. 210 | p. 211
STA: MA.B.1.2.1 BLM: analysis
ESSAY
1. ANS:
The cell theory states that all living things are composed of cells. It also says that cells are the basic units of
structure and function in living things, and that new cells come from existing cells. The cell theory is
significant to biology because all living thing are made of cells. Differences in the structure and function of
different life forms are reflected in differences in their cell structures.
PTS: 20
DIF: L2
REF: p. 191
OBJ: 7.1.1 State the cell theory.
STA: MA.SIS2.6 TOP: Foundation Edition
BLM: analysis
2. ANS:
The cell membrane is a thin, flexible barrier around the cell. The cell wall is a strong layer that surrounds the
cell membrane in some cells. The nucleus is a large structure found in some cells. It contains the cell’s genetic
material and controls the cell’s activities. The fluid portion of the cell outside the nucleus (if present), is the
cytoplasm. All cells have a cell membrane and cytoplasm. Only eukaryotes have a nucleus. Animal cells do
not have a cell wall, but plant cells and some prokaryotes do.
PTS: 20
DIF: L3
REF: p. 193 | p. 203
OBJ: 7.1.3 Distinguish between prokaryotes and eukaryotes.
STA: MA.B.1.2.1 | MA.B.1.2.2
BLM: synthesis
3. ANS:
Microtubules are hollow tubes of protein that help maintain the shape of a cell. Microtubules also make up
cilia and flagella, which function in cell movement. Microfilaments are long, thin fibers that are narrower than
microtubules. Microfilaments function in the movement and support of the cell.
PTS: 20
DIF: L3
REF: p. 199
OBJ: 7.2.2 Describe the role of vacuoles, lysosomes, and the cytoskeleton.
STA: MA.B.1.1.2 | MA.B.1.2.1
BLM: synthesis
4. ANS:
The cell wall lies outside the cell membrane of many cells, including those of plants, algae, and fungi. It
supports and protects the cell and often allows water, oxygen, carbon dioxide, and other materials to pass
through it. Most cell walls are rigid and made of carbohydrates and proteins. In contrast, the cell membrane is
a thin, flexible membrane made of a lipid bilayer with proteins that run through it and carbohydrate chains
attached to proteins poking out on the outer surface of the cell membrane. Like the cell wall, the cell
membrane provides protection and support to the cell and allows materials to pass through it. In fact, the cell
membrane regulates the movement of materials into and out of the cell.
PTS: 20
DIF: L3
REF: p. 203 | p. 205
OBJ: 7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
BLM: analysis
5. ANS:
Like a piece of mosaic art, which is made of different tiles, the cell membrane is made up of many different
kinds of molecules. The background is a lipid bilayer. Within this bilayer are proteins that form channels and
pumps that help move materials from one side of the membrane to the other. Carbohydrates on the outer
surface of the membrane act like chemical identification cards and allow cells to identify one another.
PTS: 20
DIF: L3
REF: p. 205
OBJ: 7.2.5 Describe the function of the cell membrane.
STA: MA.B.1.2.1
BLM: analysis
6. ANS:
When a normal red blood cell is placed in a hypertonic solution, one that has a higher solute concentration
than inside the cell, there is a net movement of water out of the cell. The cell will shrink due to osmotic
pressure.
PTS: 20
DIF: L2
REF: p. 210 | p. 211
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: application
7. ANS:
Aquaporins are proteins that form channels in cell membranes. These channels allow water molecules to pass
through the membrane. This is important because the lipid bilayer that makes up cell membranes is
hydrophobic, so water molecules have a hard time getting through it. Aquaporins allow water to pass through
the membrane by facilitated diffusion.
PTS: 20
DIF: L3
REF: p. 208 | p. 209
OBJ: 7.3.1 Describe passive transport.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: application
8. ANS:
Facilitated diffusion involves the movement of molecules across a membrane through protein channels. The
molecules move from an area of high concentration to an area of lower concentration. Facilitated diffusion
does not require additional energy. Active transport is the movement of particles across the cell membrane
using energy. Molecules can move from an area of low concentration to an area of higher concentration in
active transport. Osmosis is an example of facilitated diffusion.
PTS: 20
DIF: L2
REF: p. 209 | p. 212
OBJ: 7.3.2 Describe active transport.
STA: MA.B.1.2.1 TOP: Foundation Edition
BLM: analysis
9. ANS:
The cell from the unicellular organism carries out all the life processes of the organism. It is not specialized.
The cell from the multicellular organism is specialized and carries out only certain functions in the organism,
while relying on other cells in the multicellular organism to complete other life processes.
PTS: 20
DIF: L2
REF: p. 214 | p. 215
OBJ: 7.4.2 Explain how multicellular organism maintain homeostasis.
STA: MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
TOP: Foundation Edition
BLM: analysis
10. ANS:
The levels of organization in a multicellular organism include cells, tissues, organs, and organ systems.
Similar cells are grouped into tissues; tissues that work together form organs; a group of organs that work
together make up an organ system. Unicellular organisms cannot have cell specialization. Instead, all of the
activities of the organism must be carried out by the single cell.
PTS:
OBJ:
STA:
BLM:
20
DIF: L2
REF: p. 214 | p. 217
7.4.2 Explain how multicellular organism maintain homeostasis.
MA.B.1.4.7 | MA.B.1.4.8 | MA.MATH.1
TOP: Foundation Edition
analysis
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