Cellular Biochemistry Final Exam
Questions and Answers 100% Solved
The breakdown of glucose to pyruvate by a cell is an example of what type
of reaction?
A)Catabolic
B)Aerobic
C)Anabolic
D)Synthetic
E)Apoptotic - ✔✔Catabolic
You are a physician treating a person for a condition called galactosemia,
in which the patient cannot metabolize galactose and galactose-1-P
accumulates, but has no effect on metabolism of glycogen, starch or on
glycolysis. What other dietary sugar might you recommend the patient not
consume to avoid high galactose levels associated with galactosemia?
A)fructose
B)maltose
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,C)lactose
D)glucose - ✔✔Lactose
The constituents of the electron transport chain have similar capabilities,
with the exception of ubiquinone (coenzyme Q). What is the difference
about ubiquinone?
A)Ubiquinone is a lipid soluble and so can move through the inner
mitochondrial membrane.
B)Ubiquinone is a protein that is a constituent of all cells, prokaryotic or
eukaryotic; hence its name originating from "ubiquitous".
C)Ubiquinone is a protein that serves as a regulator of the rate of redox
reactions in the electron transport chain.
D)Ubiquinone is a protein that begins the electron transport chain, so it
accepts the highest-energy electrons. - ✔✔Ubiquinone is a lipid soluble
and so can move through the inner mitochondrial membrane.
The gross output of ATP from glycolysis is ____________, whereas the net
output of ATP is ____________.
A) 2; 1
B) 2; 4
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,C) 4; 2
D) 4; 1
E) 6; 4 - ✔✔4; 2
Aldolase breaks down fructose-1,6-bisphosphate into two trioses that are:
A) each doubly phosphorylated.
B) different and each singly phosphorylated.
C) identical and each doubly phosphorylated.
D) identical.
E) different and each doubly phosphorylated. - ✔✔different and each singly
phosphorylated.
Which of the following can be used as a metabolic control mechanism?
A) Regulation of enzyme degradation.
B) Enzyme compartmentation
C) Action of hormones
D) Covalent modification of an enzyme
E) All of the above - ✔✔All of the above
In eukaryotes, pyruvate is converted to acetyl CoA
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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, A) in the cellular cytosol.
B) during passage through the inner mitochondrial membrane
C) in the mitochondrial matrix
D) during passage through the mitochondrial outer membrane.
E) in the intermembrane space. - ✔✔in the mitochondrial matrix.
A temporary oxygen deficit during strenuous exercise causes a muscle to
A) synthesize glycogen.
B) synthesize muscle proteins in response to steroid hormone stimulation.
C) ferment pyruvate to lactate.
D) switch to aerobic glycolysis.
E) synthesize more NAD+. - ✔✔ferment pyruvate to lactate.
When dinitrophenol is added to mitochondria, the inner membrane
becomes permeable to protons. Would you expect ATP synthesis to
change?
A) There will be no change.
B) ATP will decrease.
C) ATP will increase. - ✔✔ATP will decrease.
4
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
Questions and Answers 100% Solved
The breakdown of glucose to pyruvate by a cell is an example of what type
of reaction?
A)Catabolic
B)Aerobic
C)Anabolic
D)Synthetic
E)Apoptotic - ✔✔Catabolic
You are a physician treating a person for a condition called galactosemia,
in which the patient cannot metabolize galactose and galactose-1-P
accumulates, but has no effect on metabolism of glycogen, starch or on
glycolysis. What other dietary sugar might you recommend the patient not
consume to avoid high galactose levels associated with galactosemia?
A)fructose
B)maltose
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,C)lactose
D)glucose - ✔✔Lactose
The constituents of the electron transport chain have similar capabilities,
with the exception of ubiquinone (coenzyme Q). What is the difference
about ubiquinone?
A)Ubiquinone is a lipid soluble and so can move through the inner
mitochondrial membrane.
B)Ubiquinone is a protein that is a constituent of all cells, prokaryotic or
eukaryotic; hence its name originating from "ubiquitous".
C)Ubiquinone is a protein that serves as a regulator of the rate of redox
reactions in the electron transport chain.
D)Ubiquinone is a protein that begins the electron transport chain, so it
accepts the highest-energy electrons. - ✔✔Ubiquinone is a lipid soluble
and so can move through the inner mitochondrial membrane.
The gross output of ATP from glycolysis is ____________, whereas the net
output of ATP is ____________.
A) 2; 1
B) 2; 4
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,C) 4; 2
D) 4; 1
E) 6; 4 - ✔✔4; 2
Aldolase breaks down fructose-1,6-bisphosphate into two trioses that are:
A) each doubly phosphorylated.
B) different and each singly phosphorylated.
C) identical and each doubly phosphorylated.
D) identical.
E) different and each doubly phosphorylated. - ✔✔different and each singly
phosphorylated.
Which of the following can be used as a metabolic control mechanism?
A) Regulation of enzyme degradation.
B) Enzyme compartmentation
C) Action of hormones
D) Covalent modification of an enzyme
E) All of the above - ✔✔All of the above
In eukaryotes, pyruvate is converted to acetyl CoA
3
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, A) in the cellular cytosol.
B) during passage through the inner mitochondrial membrane
C) in the mitochondrial matrix
D) during passage through the mitochondrial outer membrane.
E) in the intermembrane space. - ✔✔in the mitochondrial matrix.
A temporary oxygen deficit during strenuous exercise causes a muscle to
A) synthesize glycogen.
B) synthesize muscle proteins in response to steroid hormone stimulation.
C) ferment pyruvate to lactate.
D) switch to aerobic glycolysis.
E) synthesize more NAD+. - ✔✔ferment pyruvate to lactate.
When dinitrophenol is added to mitochondria, the inner membrane
becomes permeable to protons. Would you expect ATP synthesis to
change?
A) There will be no change.
B) ATP will decrease.
C) ATP will increase. - ✔✔ATP will decrease.
4
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
