Cell Biology Exam 3 UPDATED Actual
Exam Questions and CORRECT Answers
Which of the following can readily cross the cell plasma membrane without the aid of a
transport protein?
a. K+ d.O2
b. Na+ e. amino acids
c. RNA - CORRECT ANSWER✔✔- D. Oxygen
Transport of glucose by Na+/glucose symport is an example of
a. simple diffusion. d. indirect active transport.
b. facilitated diffusion. e. none of the above.
c. direct active transport. - CORRECT ANSWER✔✔- D. Indirect active transport
A major difference between active transport and facilitated diffusion is that in facilitated
diffusion
a. no proteins are involved.
b. solutes move from high concentration to low concentration.
c. solutes move from low concentration to high concentration.
d. the energy is provided by GTP instead of ATP.
e. none of the above. - CORRECT ANSWER✔✔- B. Solutes move from high concentration
to low concentration
The net outputs of ATP and NADH from fermentation of one molecule of glucose to two
molecules of lactate are _____, and _____, respectively. - CORRECT ANSWER✔✔- 2; 0
The Na+/K+ pump located in the plasma membrane of animal cells actively moves -
CORRECT ANSWER✔✔- Na+ out of and K+ into a cell.
In the aerobic respiration, the position of each electron carrier in the electron transport system
is determined by - CORRECT ANSWER✔✔- Its standard reduction potential
,During aerobic respiration, the TCA cycle occurs:
a. in the cytosol.
b. in the mitochondrial outer membrane.
c. in the mitochondrial matrix.
d. in the intermembrane space.
e. in the mitochondrial inner membrane. - CORRECT ANSWER✔✔- C. In the mitochondrial
matrix
Which of the following is a feature of the Fluid Mosaic Model of membrane structures?
a. Membranes consist of lipid bilayers that are coated on one side with a thin sheet of proteins
b. Membranes consist of lipid bilayers that are coated on both sides with thin sheets of
proteins.
c. Membranes are in fluid state.
d. All of the above.
e. None of the above. - CORRECT ANSWER✔✔- C. Membranes are in fluid state
Biological membrane asymmetry (the two monolayers are different) can be manifested
by________.
a. the types of lipids present in each monolayer
b. the degree of unsaturation of the fatty acids in the phospholipid molecules
c. movement of each monolayer
d. a and b
e. a and c - CORRECT ANSWER✔✔- D. A and B
Which of the following is NOT a product of the TCA cycle?
a. CO2
d.ATP
,b. FADH2
e. pyruvate
c. NADH - CORRECT ANSWER✔✔- Pyruvate
Protein X can be extracted from biological membranes only if the extract buffer contains
detergent. Based on this result, it is highly likely that protein X is a(n) - CORRECT
ANSWER✔✔- integral membrane protein
Na+ may cross biological membranes via
a. active transport.
b. simple diffusion.
c. facilitated diffusion.
d. a and b.
e. a and c. - CORRECT ANSWER✔✔- E. A and C
In the biological systems, hydrogenation reaction
a. is an oxidative reaction.
b. involves removal of electrons.
c. involves removal of protons.
d. all of the above
e. none of the above - CORRECT ANSWER✔✔- e. None of the above
Aerobic respiration involves five stages, and the order of the five stages is
a. Glycolysis , pyruvate oxidation, electron transfer, TCA (tricarboxylic acid) cycle , ATP
synthesis
b. Glycolysis, pyruvate oxidation, TCA (tricarboxylic acid) cycle, electron transfer, ATP
synthesis
c. Glycolysis , TCA (tricarboxylic acid) cycle, pyruvate oxidation, electron transfer, ATP
synthesis
, d. Glycolysis, electron transfer, TCA (tricarboxylic acid) cycle, pyruvate oxidation, ATP
synthesis
e. TCA (tricarboxylic acid) cycle, glycolysis, electron transfer, pyruvate oxidation, ATP
synthesis - CORRECT ANSWER✔✔- b. Glycolysis, pyruvate oxidation, TCA (tricarboxylic
acid) cycle, electron transfer, ATP synthesis
Which of the following statements is correct for simple diffusion and facilitated diffusion?
a. Both processes have directionality.
b. Both processes can be inhibited by competitive inhibitors.
c. Both processes are membrane-protein mediated.
d. In both processes, solutes move from higher concentration to lower concentration.
e. In both processes, solutes move from low concentration to higher concentration -
CORRECT ANSWER✔✔- d. In both processes, solutes move from higher concentration to
lower concentration.
The central function of the TCA (tricarboxylic acid) cycle is to
a. use the proton gradient to synthesize ATP.
b. transfer electrons from the reduced coenzymes to oxygen.
c. reduce pyruvate to lactate, and conserve free energy as reduced coenzymes and ATP.
d. oxidize acetyl CoA to CO2, and conserve free energy as reduced coenzymes and ATP
e. oxidize glucose to pyruvate, and conserve free energy as reduced coenzymes and ATP. -
CORRECT ANSWER✔✔- d. oxidize acetyl CoA to CO2, and conserve free energy as
reduced coenzymes and ATP
Biosynthesis of starch occurs in the ___________
a. intermembrane space. d. mitochondria.
b. cytosol. e. nucleus.
c. chloroplast. - CORRECT ANSWER✔✔- Chloroplast
Which of the following statements accurately describes the function of the Calvin cycle?
Exam Questions and CORRECT Answers
Which of the following can readily cross the cell plasma membrane without the aid of a
transport protein?
a. K+ d.O2
b. Na+ e. amino acids
c. RNA - CORRECT ANSWER✔✔- D. Oxygen
Transport of glucose by Na+/glucose symport is an example of
a. simple diffusion. d. indirect active transport.
b. facilitated diffusion. e. none of the above.
c. direct active transport. - CORRECT ANSWER✔✔- D. Indirect active transport
A major difference between active transport and facilitated diffusion is that in facilitated
diffusion
a. no proteins are involved.
b. solutes move from high concentration to low concentration.
c. solutes move from low concentration to high concentration.
d. the energy is provided by GTP instead of ATP.
e. none of the above. - CORRECT ANSWER✔✔- B. Solutes move from high concentration
to low concentration
The net outputs of ATP and NADH from fermentation of one molecule of glucose to two
molecules of lactate are _____, and _____, respectively. - CORRECT ANSWER✔✔- 2; 0
The Na+/K+ pump located in the plasma membrane of animal cells actively moves -
CORRECT ANSWER✔✔- Na+ out of and K+ into a cell.
In the aerobic respiration, the position of each electron carrier in the electron transport system
is determined by - CORRECT ANSWER✔✔- Its standard reduction potential
,During aerobic respiration, the TCA cycle occurs:
a. in the cytosol.
b. in the mitochondrial outer membrane.
c. in the mitochondrial matrix.
d. in the intermembrane space.
e. in the mitochondrial inner membrane. - CORRECT ANSWER✔✔- C. In the mitochondrial
matrix
Which of the following is a feature of the Fluid Mosaic Model of membrane structures?
a. Membranes consist of lipid bilayers that are coated on one side with a thin sheet of proteins
b. Membranes consist of lipid bilayers that are coated on both sides with thin sheets of
proteins.
c. Membranes are in fluid state.
d. All of the above.
e. None of the above. - CORRECT ANSWER✔✔- C. Membranes are in fluid state
Biological membrane asymmetry (the two monolayers are different) can be manifested
by________.
a. the types of lipids present in each monolayer
b. the degree of unsaturation of the fatty acids in the phospholipid molecules
c. movement of each monolayer
d. a and b
e. a and c - CORRECT ANSWER✔✔- D. A and B
Which of the following is NOT a product of the TCA cycle?
a. CO2
d.ATP
,b. FADH2
e. pyruvate
c. NADH - CORRECT ANSWER✔✔- Pyruvate
Protein X can be extracted from biological membranes only if the extract buffer contains
detergent. Based on this result, it is highly likely that protein X is a(n) - CORRECT
ANSWER✔✔- integral membrane protein
Na+ may cross biological membranes via
a. active transport.
b. simple diffusion.
c. facilitated diffusion.
d. a and b.
e. a and c. - CORRECT ANSWER✔✔- E. A and C
In the biological systems, hydrogenation reaction
a. is an oxidative reaction.
b. involves removal of electrons.
c. involves removal of protons.
d. all of the above
e. none of the above - CORRECT ANSWER✔✔- e. None of the above
Aerobic respiration involves five stages, and the order of the five stages is
a. Glycolysis , pyruvate oxidation, electron transfer, TCA (tricarboxylic acid) cycle , ATP
synthesis
b. Glycolysis, pyruvate oxidation, TCA (tricarboxylic acid) cycle, electron transfer, ATP
synthesis
c. Glycolysis , TCA (tricarboxylic acid) cycle, pyruvate oxidation, electron transfer, ATP
synthesis
, d. Glycolysis, electron transfer, TCA (tricarboxylic acid) cycle, pyruvate oxidation, ATP
synthesis
e. TCA (tricarboxylic acid) cycle, glycolysis, electron transfer, pyruvate oxidation, ATP
synthesis - CORRECT ANSWER✔✔- b. Glycolysis, pyruvate oxidation, TCA (tricarboxylic
acid) cycle, electron transfer, ATP synthesis
Which of the following statements is correct for simple diffusion and facilitated diffusion?
a. Both processes have directionality.
b. Both processes can be inhibited by competitive inhibitors.
c. Both processes are membrane-protein mediated.
d. In both processes, solutes move from higher concentration to lower concentration.
e. In both processes, solutes move from low concentration to higher concentration -
CORRECT ANSWER✔✔- d. In both processes, solutes move from higher concentration to
lower concentration.
The central function of the TCA (tricarboxylic acid) cycle is to
a. use the proton gradient to synthesize ATP.
b. transfer electrons from the reduced coenzymes to oxygen.
c. reduce pyruvate to lactate, and conserve free energy as reduced coenzymes and ATP.
d. oxidize acetyl CoA to CO2, and conserve free energy as reduced coenzymes and ATP
e. oxidize glucose to pyruvate, and conserve free energy as reduced coenzymes and ATP. -
CORRECT ANSWER✔✔- d. oxidize acetyl CoA to CO2, and conserve free energy as
reduced coenzymes and ATP
Biosynthesis of starch occurs in the ___________
a. intermembrane space. d. mitochondria.
b. cytosol. e. nucleus.
c. chloroplast. - CORRECT ANSWER✔✔- Chloroplast
Which of the following statements accurately describes the function of the Calvin cycle?
