Download Mock Exam 2 1. Which of the following s

Supplemental Instruction BY123 Dr. Fischer
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Mock Exam 2
1. Which of the following statements concerning anabolic and catabolic pathways is true?
a. Catabolic pathways consume energy produced by anabolic pathways
b. Anabolic pathways consume energy produced by catabolic pathways
c. Catabolic pathways release energy by building simple molecules into larger molecules
d. Both b and c
2. Which of the following statements concerning enzymes is true?
a. Enzymes increase reaction rates by raising the activation energy of a reaction
b. The most efficient enzymes can catalyze reactions in either direction
c. The more heat that is added to a reaction, the faster the enzymes function
d. None of the above
3. Exergonic reactions usually involve:
a. A positive delta G, a net release of energy, and spontaneity
b. A negative delta G, a net absorption of energy, and no spontaneity
c. A positive delta G, a net release of energy, and no spontaneity
d. A negative delta G, a net release of energy, and spontaneity
4. During photosynthesis, where in a plant cell would one be likely to find a pH of 3?
a. Thylakoid space
b. Stroma
c. Stomata
d. Intermembrane space
5. Which of the following incorrectly pairs a metabolic process with its site of occurrence
a. Glycolysis- cytosol
b. Citric acid cycle- mitochondrial membrane
c. ATP phosphorylation- cytosol and mitochondria
d. Oxidative decarboxylation of pyruvate- mitochondria
6. Which is true of allosteric sites?
a. They are found at the active site
b. They are involved in noncompetitive inhibition
c. They are involved in competitive inhibition
d. Both a and b
7. What is the final electron recipient in the electron transport chain in respiration?
a. Water
b. Carbon dioxide
c. Cytochrome complex
d. Oxygen
8. Which of the following statements correctly identifies the purpose of fermentation?
a. To use up excess pyruvate formed as a result of glycolysis
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b. To produce NAD+ in order to continue glycolysis
c. To produce NADH in order to continue glycolysis
d. To prevent further increases in oxygen debt
If an enzyme solution is saturated with substrate, the most effective way to obtain an even
faster yield of products is to
a. Add more of the enzyme
b. Heat the solution to 90 degrees C
c. Add more substrate
d. Add an allosteric inhibitor
e. Add a noncompetitive inhibitor
How many ATP (net), NADH, FADH2, and CO2 molecules are produced if one glucose molecule
undergoes glycolysis and the oxidation of pyruvate?
a. 2ATP, 4NADH, 0FADH2, 2CO2
b. 2ATP, 4NADH, 1FADH2, 1CO2
c. 6ATP, 2NADH, 2FADH2, 1CO2
d. 6ATP, 2NADH, 0FADH2, 2CO2
How is citrate formed in the Krebs cycle?
a. Acetyl CoA + alpha-ketoglutarate
b. Alpha-ketoglutarate+ isocitrate
c. Succinyl CoA + oxaloacetate
d. Acetly CoA + oxaloacetate
For each glucose molecule, how many ATP, NADH, FADH2, CO2, and GTP result from the Krebs
cycle alone?
a. 4ATP, 2GTP, 6NADH, 2CO2, and 2FADH2
b. 2ATP, 2GTP, 4NADH, 4CO2, and 4FADH2
c. 4ATP, 2GTP, 8NADH, 2CO2, and 2FADH2
d. 2ATP, 0GTP, 6NADH, 4CO2, and 2FADH2
Where do hydrogen ions accumulate during the electron transport chain in the mitochondria?
a. Cytoplasm
b. Inner mitochondrial matrix
c. Intermembrane space
d. Cristae of the mitochondria
Which of the following sequences correctly represents the flow of electrons during
photosynthesis?
a. NADPH  oxygen gas  carbon dioxide
b. Water  NADPH  calvin cycle
c. NADPH  chlorophyll  calvin cycle
d. Water  photosystem 1  photosystem 2
e. NADPH  electron transport chain  oxygen gas
If a leaf was to become flaccid and the stomata closed, what aspect(s) of the plant would be
affected?
1. CO2 and O2 exchange 2. Light reactions 3. Absorption of light energy 4. Calvin cycle
a. 3 only
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b. 1 only
c. 1, 2, and 3
d. 1 and 4
How many molecules of carbon dioxide must enter the Calvin cycle in order to produce a sugar
containing 12 carbon atoms?
a. 18
b. 9
c. 24
d. 12
In noncyclic electron flow in photosynthesis:
a. The reaction center is oxidized
b. Excited electrons travel from the primary electron acceptor to an electron transport chain
and then back to the original reaction center
c. An enzyme extracts electrons from water and carries them back to the reaction center,
thereby reducing it
d. Both a and c
e. None of the above
In the calvin cycle, a CO2 molecule is added to a __________ sugar by way of _________
(enzyme)
a. 5-C sugar(RuBp); rubisco
b. 6-C sugar (rubisco); RuBp
c. 4-C sugar (rubisco); RuBp
d. None of the above
Most of the electrons removed from glucose by cellular respiration are used for which of the
following processes.
a. Reducing NAD+ to NADH in glycolysis and the citric acid cycle
b. Producing a proton gradient for ATP synthesis in the mitochondria
c. Driving substrate level phosphorylation in the electron transport system
d. A and b
When chloroplast pigments absorb light,
a. Their electrons become excited
b. They lose potential energy
c. They become reduced
d. Their photons become oxidized
In mechanism, photophosphorylation is most similar to
a. Substrate level phosphorylation in cellular respiration
b. Oxidative phosphorylation in cellular respiration
c. The calvin cycle
d. Reduction of NADP+
The calvin cycle always occurs in
a. Thylakoid space
b. Stroma
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c. Matrix
d. Grana
e. None of the above
Glycolysis would take place in which of the following
a. Facultative anaerobe
b. Strict aerobe
c. Strict anaerobe
d. A and b only
e. All of the above
Phosphofructokinase is an example of
a. An allosteric enzyme
b. An isomerase enzyme
c. Competitive inhibition
d. Non-competetive inhibition
e. A and d only
Which of the following would produce the most ATP
a. 1 molecule of glucose
b. 1 molecule of glycerol
c. Amino acid entering the citric acid cycle
d. Neutral fat with three 4-C tails
Where would one be likely to find cytochrome C?
a. Intermembrane of the chloroplast
b. Inner membrane of mitochondrion
c. Thylakoid membrane
d. Outer membrane of the mitochondrion
e. Both b and c
Where would you expect to find the lowest pH in the mitochondrion?
a. Intermembrane space
b. Within the inner membrane
c. In the matrix
d. In the cytosol
In glucose degradation, under aerobic conditions:
a. Oxygen is the final electron acceptor
b. Oxygen is necessary for ATP synthesis
c. Water is produced
d. Both A and C
Which of the following parameters would always result in endergonic conditions?
a. +∆H and +∆S
b. +∆H and -∆S
c. -∆H and +∆S
d. -∆H and -∆S
Which of the following is a reduced coenzyme?
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a. NADH
b. NADP+
c. FAD
d. All of the above
Which of the following processes produce ATP
a. Glycolysis
b. Citric acid cycle
c. Photosynthesis
d. A and b only
e. All of the above
How would an increase in AMP concentration effect phosphofructokinase?
a. The enzyme’s active site would be blocked.
b. There would be no effect on the enzyme
c. AMP would bind to a non-active site on the enzyme, stabilizing its active form.
d. The in-active form of phosphofructokinase would be stabilized.
With respect to hydrogen ion concentration, the intermembrane space is most closely related to
what in the chloroplast?
a. Stroma
b. Innermembrane
c. Thylakoid space
d. Granum
e. None of the above
Fatty acids enter the catabolic pathway in the form of
a. glycerol
b. adipose tissue
c. acetyl CoA
d. keto acids
A cell with 10 chromosomes undergoes mitosis and cell division. How many daughter cells are
produced and what number of chromosomes do they have?
a. 2 daughter cells, 5 chromosomes each
b. 1 daughter cell, 10 chromosomes
c. 4 daughter cells, 20 chromosomes each
d. 2 daughter cells, 10 chromosomes each
e. 4 daughter cells, 5 chromosomes each
A human cell containing 22 autosomes and a Y chromosome is
a. A somatic cell of a male
b. A zygote
c. A somatic cell of a female
d. A sperm cell
e. An ovum
At metaphase, how many chromatids will a human somatic cell have?
a. 46
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b. 23
c. 92
d. 184
Some studies suggest that in patients with Alzheimer’s disease there is a defect in the way the
spindle apparatus attaches to the kinetochore fibers. At which stage of mitotic division would
you expect to see this problem?
a. Prophase
b. Metaphase
c. Anaphase
d. Telophase
According to the endosymbiont hypothesis, mitochondria are bacterial descendants because
they formed as a result of a eukaryotic cell engulfing a prokaryotic cell. Based on this, what type
of division would you expect to see in mitochondria?
a. Binary fission
b. Mitosis
c. Budding
d. Regeneration
During which phase of the meiotic cycle does the cell have a diploid number of chromosomes?
a. In the beginning of prophase 1
b. At the end of anaphase 1
c. At the end of telophase 2
d. Both A and B
If you want to incorporate a fluorescently labeled adenine into one of the two daughter cells
that would arise as a result of mitosis, at which stage of cell development should you add in the
nucleotide?
a. G1
b. G2
c. M
d. S
Which of the following does not contribute to genetic variability?
a. Random fertilization of a sperm and egg
b. Independent assortment of homologous chromosomes
c. Crossing over between homologous chromosomes during meiosis
d. The interkinesis that occurs during telophase 1
Which of the following is true regarding prophase?
a. The chromosomes separate and move to opposite poles of the cell
b. The spindle apparatus disappears
c. The chromosomes uncoil
d. The nucleoli disappear
Which of the following is not a product of fermentation?
a. Carbon dioxide
b. Oxygen
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c. Ethanol
d. Lactic acid
You would be unlikely to see which one of the following human cells dividing?
a. skin cell
b. cancer cell
c. nerve cell
d. cell from an embryo
e. intestinal lining cell
A karyotype is __________.
a. The physical traits a person has
b. A method of identifying crossover events
c. All the possible gametes a person could produce
d. A photograph of all of an individual’s chromosomes
e. A list of all the genes a person carries
What is the result when a diploid cell undergoes meiosis?
a. Two diploid cells
b. Two haploid cells
c. Four diploid cells
d. Four haploid cells
e. Two haploid cells and two diploid cells
Crossing over can occur during _________.
a. Anaphase I
b. Prophase I
c. Cytokinesis
d. Prophase II
e. Metaphase I
Which of the following occurs during anaphase I?
a. Homologs separate and migrate toward opposite poles
b. Sister chromatids separate and migrate toward opposite poles
c. Nuclei re-form
d. Chromosomes line up in one plane
e. The cell is haploid
The major contribution of sex to evolution is that ________.
a. it is the only mechanism for species to reproduce
b. it provides a method to increase genetic variation
c. it provides a way in which somatic mutation can be inherited
d. the first and second answers are correct
e. the second and third answers are correct