Chapter3
This activity contains 4 questions.
Label the cellular structures.
For each item below, use the pull-down menu to
select the letter that labels the correct part of the
image.
1.1 Cytosol
1.2 Nuclear
envelope
surrounding
nucleus
1.3 Fixed
ribosomes
1.4 Mitochondrion
Label the cellular structures.
For each item below, use the pull-down menu to
select the letter that labels the correct part of the
image.
2.1 Plasma
membrane
2.2 Smooth
endoplasmic
reticulum
2.3 Microvilli
2.4 Free
ribosomes
Label the cellular structures.
For each item below, use the pull-down menu to
select the letter that labels the correct part of the
image.
3.1 Nucleoulus
3.2 Golgi
apparatus
3.3 Rough
endoplasmic
reticulum
Label the cellular structures.
For each item below, use the pull-down menu to
select the letter that labels the correct part of the
image.
4.1
Hypotonic
[hint]
4.2 Isotonic [hint]
4.3
Hypertonic
[hint]
This activity contains 6 questions.
Put the following statements about receptor-mediated endocytosis into the proper order by
matching them with (1) earliest to (7) latest:
Using the pull-down menus, match each item in the left column to the corresponding item in
the right column.
The bound receptor migrates to a coated pit
region of the membrane surface.
1.1
1
The coated pit forms a coated vesicle by
endocytosis.
1.2
2
The receptor is separated from the ligand and
recycled to the cell surface.
A ligand binds an unoccupied cell surface
receptor.
1.3
3
The ligand is broken down and its products
enter the cytosol across the vesicle membrane.
The internalized vesicle binds to a primary
lysosome.
1.4
4
1.5
5
1.6
6
Match each process to the responsible organelle:
Using the pull-down menus, match each item in the left column to the corresponding item in
the right column.
2.1 Detoxifies/inactivates drugs in
liver
Ribosome
2.2 Flat saccules that package
secretions
Smooth ER
Rough ER
2.3 Produces proteins on linked
ribosomes
Mitochondria
Golgi
apparatus
2.4 Contains enzymes of TCA
cycle
2.5 The site of the translation step
in protein synthesis
Put the following steps of translation into the proper order by matching them to (1) first
through (6) last:
Using the pull-down menus, match each item in the left column to the corresponding item in
the right column.
3.1
1
3.2
2
3.3
3
3.4
4
mRNA binds a light ribosomal subunit, and the
start codon binds a tRNA carrying methionine.
Termination occurs when a stop codon is
reached in the mRNA being read.
Each tRNA binds to the next codon of the mRNA,
adding amino acids to the polypeptide chain.
The ribosome breaks the amino acid off its tRNA
and attaches it to its neighbor by a peptide bond.
Elongation begins as a second tRNA's anticodon
binds the next codon on the mRNA.
3.5
5
A heavy ribosomal subunit joins the complex to
create a complete ribosome.
3.6
6
Match the following events to the proper phase or process of mitosis:
Using the pull-down menus, match each item in the left column to the corresponding item in
the right column.
4.1 Chromatid pairs separate and move
toward opposite sides of the cell.
Cytokinesis
Anaphase
4.2 Chromosomes align down the
center of the cell.
Prophase
Telophase
4.3 The cytoplasm splits to form
daughter cells.
Metaphase
4.4 Chromosomes appear, the nucleoli
disappear, and the nuclear envelope
disappears.
4.5 Spindle fibers break down and
chromatin appears.
Match the following membrane functions with the structure responsible for each:
Using the pull-down menus, match each item in the left column to the corresponding item in
the right column.
5.1 Physical isolation
Glycocalyx
5.2 Cell-to-cell recognition
Carrier proteins
Channel proteins
5.3 Structural support
Extracellular
protein fibers
Receptor proteins
5.4 Ligand binding
Phospholipid
bilayer
5.5 Transporting solutes
across the membrane
5.6 Passageway completely
across cell membrane
Match each process to the responsible organelle:
Using the pull-down menus, match each item in the left column to the corresponding item in
the right column.
6.1 Smooth
endoplasmic
reticulum
6.2 Lysosome
Lipid and carbohydrate synthesis
Neutralizes toxic compounds
6.3 Peroxisome
Is essential for the movement of
chromosomes during cell division
Removes damaged organelles or
pathogens
6.4 Cilia
6.5 Centrosome
This activity contains 25 questions.
The two classes of cells found in the human body are
sex cells and somatic cells.
permanent and temporary.
bone cells and endocrine cells.
Moves materials over the surface
of the cell
muscular and nervous.
The two main lipids found in the structure of the plasmalemma are
prostaglandins and triglycerides.
prostaglandins and phospholipids.
cholesterol and triglycerides.
cholesterol and phospholipids.
The plasmalemma is said to be selectively permeable because
they permit the passage of no materials.
they allow the free passage of some materials and restrict the passage of others.
they pump substances from one side of the membrane to another.
they permit the free passage of all materials.
The movement of solutes from an area of high concentration to an area of lower
concentration is an example of
vesicular transport.
osmosis.
active transport.
diffusion.
The movement of water molecules from an area of high concentration to an area of lower
concentration is an example of
passive transport.
diffusion.
pinocytosis.
osmosis.
A solution that contains a solute concentration greater than that in a cell is said to be
isotonic.
hypotonic.
microtonic.
hypertonic.
Hemolysis occurs when a red blood cell is placed in a(n)
isotonic solution.
hypotonic solution.
hypertonic solution.
microtonic solution.
Facilitated diffusion is
a process in which vesicles formed inside cells fuse with the cell membrane and
discharge their contents outside the cell.
a process in which molecules are forced by hydrostatic pressure across a
membrane.
a process that requires ATP to move a substance against a concentration
gradient.
a process in which a molecule is carried across a membrane with the help of
membrane-bound carriers.
Active transport is
a process in which molecules are forced across a membrane by hydrostatic
pressure.
a process in which vesicles formed inside the cell fuse with the plasmalemma and
discharge their contents outside the cell.
a process in which molecules are moved into cells with the aid of membranebound carriers.
a process that requires ATP to pump molecules across a membrane against a
concentration gradient.
When you describe the effects of various osmotic solutions on cells, you use the term
osmosis.
osmolarity.
tonicity.
hydrostatic pressure.
Exocytosis is
a process that requires ATP to move a substance across a membrane against its
concentration gradient.
a process in which vesicles formed inside the cell fuse with the plasmalemma and
discharge their contents outside the cell.
a process in which molecules are forced by hydrostatic pressure across a
membrane.
a process in which molecules are moved into a cell along a concentration gradient
with the help of membrane-bound carriers.
Which of the following membrane transport mechanisms requires ATP?
Facilitated diffusion
Osmosis
Pinocytosis
Filtration
Which of the following is TRUE regarding the Na+/K+ exchange pump?
This is a passive process.
Three Na+ ions are exchanged for every two K+ ions.
It exchanges intracellular K+ for extracellular Na+.
The rate of ion transport is only dependent on the concentration of sodium ions.
In which phase of interphase does DNA replication take place?
G0
G2
G1
S
Centrioles
are found in pairs in nondividing cells.
have a 9 + 0 arrangement of microtubules.
are found in all animal cells capable of undergoing cell division.
All of the above are true.
The primary components of the cytoskeleton that give the cells strength and rigidity and
anchor organelles are the
intermediate filaments.
thick filaments.
microfilaments.
microtubules.
The smooth endoplasmic reticulum is
the site of lipid synthesis.
the site of polysaccharide synthesis.
the site of protein synthesis.
the site of chromosome attachment.
Lysosomes
are important sources of ATP production.
are the sites of protein synthesis.
contain digestive enzymes.
are the sites of lipid synthesis.
What type of ribosome can be found attached to the rough endoplasmic reticulum?
Large ribosomal subunits
Free ribosomes
Fixed ribosomes
Small ribosomal subunits
What is the continuous movement and exchange of membrane sections called?
Glycolysis
Transcription
Endocytosis
Membrane flow
The TCA cycle
is aerobic.
is important in ATP production.
occurs inside mitochondria.
All of the above are true.
The process resulting in the assembly of a functional protein from messenger RNA is
called
transcription.
translation.
elongation.
DNA synthesis.
The process by which messenger RNA is formed from DNA is called
DNA synthesis.
transcription.
elongation.
translation.
The stages of mitosis, in the correct order, are
prophase, metaphase, anaphase, and telophase.
prophase, metaphase, telophase, and anaphase.
anaphase, metaphase, telophase, and prophase.
prophase, telophase, metaphase, and anaphase.
Genetically controlled cell death is called
mitosis.
meiosis.
interphase.
apoptosis.
This activity contains 5 questions.
Chromatin condenses into chromosomes in telophase.
True
False
Facilitated diffusion differs from active transport in that active transport requires the
expenditure of ATP and facilitated diffusion does not.
True
False
A hypotonic solution contains more solutes than a cell.
True
False
The endoplasmic reticulum is called rough endoplasmic reticulum (RER) if mitochondria
are associated with the membrane.
True
False
DNA replication is the process by which the DNA makes a copy of itself during interphase.
True
False
This activity contains 4 questions.
In a phospholipid bilayer, the outer surfaces contain
When a red blood cell is placed into a
heads.
solution, crenation occurs.
In a phospholipid bilayer, the inner portion of the membrane
contains
tails of the component molecules.
The specialization process that occurs when a gene switches off restricting the cell's
functional abilities is called
.