BIO 10 Exam 2 KEY
Fall, 2007
PART A (40 pts)
Multiple Choice (2 pts each)
Circle the correct answer. There is only one correct answer in each case.
1.
Photosynthesis is an _________ process that involves _________ reactions.
A.
B.
C.
D.
E.
2.
The Kreb's Cycle
A.
B.
C.
D.
E.
3.
mitochondrion; 36
cytoplasm; 36
mitochondrion; 2
cytoplasm; 2
none of the above
During glycolysis, glucose is broken down into 2 __________ molecules.
A.
B.
C.
D.
E.
6.
in the stroma of the chloroplast
from the splitting of water
from the splitting of carbon dioxide
in the plant cell's vacuole
None of the above
Anaerobic respiration takes place in the _________ and produces a net of _____ ATP.
A.
B.
C.
D.
E.
5.
releases carbon dioxide as a bi-product
occurs in the inner compartment of the thylakoid
breaks down glucose in the cytoplasm of eukaryotic cells
describes how carbon is cycled through the environment
is light dependent
During the light dependent reaction, oxygen is produced
A.
B.
C.
D.
E.
4.
exothermic; reduction
endothermic; reduction
exothermic; oxidation
endothermic; oxidation
None of the above
carbon dioxide
water
pyruvic acid
starch
amino acid
Which of the following is NEVER associated with the plasma membrane?
A.
B.
C.
D.
E.
DNA
proteins
carbohydrates
lipids
cholesterol
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7.
During mitosis, the chromosomes first become visible under the light microscope
during
A.
B.
C.
D.
E.
8.
Meiosis involves ____ cell divisions and produces ____ daughter cells.
A.
B.
C.
D.
E.
9.
sister chromatids separate
homologous chromosomes separate
crossing over takes place
DNA is replicated in preparation for cytokinesis
None of the above
During photosynthesis, hydrogen ions build up in the _____________.
A.
B.
C.
D.
E.
13.
7 chromosomes
14 chromosomes
28 chromosomes
14 sets of chromosomes
There is no way to predict the number of chromosomes in its brain cells
During anaphase of meiosis II
A.
B.
C.
D.
E.
12.
DNA replication
meiosis I
meiosis II
cytokinesis
crossing over of homologous chromosome pairs
If an animal's sperm cells contain 14 chromosomes, its brain cells will contain
A.
B.
C.
D.
E.
11.
1; 2
2; 4
4; 8
8; 16
16; 32
In animals, fertilization is immediately followed by
A.
B.
C.
D.
E.
10.
interphase
prophase
metaphase
anaphase
telophase
inner thylakoid compartment
stroma
intermembrane space
cytoplasm
photopsystems
When the sun is up, plants engage in
A.
B.
C.
D.
E.
the light dependent reaction of photosynthesis only
photosynthesis but not respiration
respiration but not photosynthesis
both photosynthesis and respiration
the light independent reaction of photosynthesis only
2
14.
During fermentation, yeast cells produce:
A.
B.
C.
D.
E.
15.
facilitated diffusion
osmosis
active transport
simple diffusion
exocytosis
The First Law of Thermodynamics states that
A.
B.
C.
D.
E.
20.
burst open
shrivel up
adjust by retaining water through osmosis
undergo meiosis
None of the above
The passage of hydrogen ions through ATP synthase is a form of
A.
B.
C.
D.
E.
19.
the apical meristem
the cone
no part of the plant; flowering plants reproduce asexually
the flower
the roots
If a human white blood cell is placed in a solution with a very high salt concentration it
will
A.
B.
C.
D.
E.
18.
a sugar, a nitrogenous base, and 3 phosphates
two nucleotides connected by a phosphate bridge
a long chain of glucose molecules
two polypeptide chains wound around one another
None of the above
In a flowering plant, the sexual organs are found in
A.
B.
C.
D.
E.
17.
carbon dioxide, and lactic acid
carbon dioxide, and water
oxygen, and ethanol
carbon dioxide, and ethanol
oxygen, and water
ATP is comprised of
A.
B.
C.
D.
E.
16.
ATP,
ATP,
ATP,
ATP,
ATP,
entropy always increases in the Universe
absolute zero can never be achieved
energy can never be created or destroyed, just transformed
water and oil don't mix
None of the above
Enzymes
A.
B.
C.
D.
E.
hasten reactions in the cell by lowering the activation energy required
are biological catalysts
do not get changed as a result of their interaction with substrates
are almost always proteins
All of the above
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PART B (30 points)
Short Answer.
21.
(10 pts)
In a species of flatworm, the chromosomes line up as shown below in metaphase of mitosis.
Draw the chromosomes as they would appear in metaphase of meiosis I in this same
organism. (Use the same sizes and shadings from the drawing above.)
22.
(8 pts)
Fill in the table below.
Photosynthesis
Anaerobic Respiration
Y
N
N
N
N
N
Y
N
Y
N
Y
Y
Y
N
Y
N
Requires sunlight? (Y/N)
Requires mitochondria? (Y/N)
Requires oxygen? (Y/N)
Produces starch? (Y/N)
Works against entropy? (Y/N)
Can occur in prokaryotes? (Y/N)
Requires ATP synthase? (Y/N)
Consumes carbon dioxide? (Y/N)
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23.
(6 pts)
What two important tasks must meiosis accomplish that mitosis does not?
1.
Halves the number of sets of chromosomes
2.
Creates new genetic variation
24.
(10 pts)
Identify the structures/spaces in the diagram of a mitochondrion below.
a.
inner mitochondrial membrane
b.
Kreb's Cycle
c.
electron transport chain
d.
ATP synthase
e.
intermembrane space
25. (4 pts)
From a functional perspective, what do the molecules ATP, NADH, FADH2 and starch all have
in common?
They are all energy storage molecules.
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PART C (22 points)
True (T) or False (F)? If the answer is false, cross out the underlined word and
replace it with the correct word.
EXAMPLE:
__F
in Tanzania
Dr. Ballard recently got married on the set of the TV show "Forensic Files"
T
Life requires energy to combat entropy.
F; sister chromatids
Homologous chromosomes are usually identical in DNA sequence.
T
The process of active transport is endergonic.
T
Oxygen is the final acceptor of low energy electrons from the electron
transport chain during aerobic respiration.
F; proteins
Chromosomes are comprised of DNA and carbohydrates.
T
A typical human chromosome contains many millions of bp of DNA.
F; 21
The smallest human chromosome is chromosome 22.
T
The human X chromosome is much larger than the human Y
chromosome.
F; some
All eukaryotic organisms have sex chromosomes.
F; NADH
In anaerobic respiration, the energy stored in pyruvic acid and ATP are
wasted.
T
Crossing over occurs in prophase of meiosis I.
F; homologues
In crossing over, sister chromatids line up and exchange parts.
F; thylakoid membrane
During photosynthesis, photons are absorbed by chlorophyl
molecules located in the stroma of the chloroplast.
F; electron transport chain
NADH produced in the Kreb Cycle is immediately transported
to ATP synthase.
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