Question 1

Glycolysis is utilized by cells in both respiration and fermentation.

Accepted Answer

A) True 
 B)False

Question 2

The pentose phosphate pathway can be characterized as an anabolic pathway.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following uses CO2 for carbon and H2 for energy?

Accepted Answer

A)   chemoheterotroph
B)   chemoautotroph
C)   photoheterotroph
D)   photoautotrophE) C) and D)
F) A) and C)

Question 4

In noncyclic photophosphorylation, O2 is released from

Accepted Answer

A)   H2O.
B)   chlorophyll.
C)   sunlight.
D)   CO2.
E)   C6H12O6.F) A) and D)
G) A) and C)

Question 5

Gallionella bacteria can get energy from the reaction Fe2+ -Fe3+. This reaction is an example of

Accepted Answer

A)   the Calvin- Benson cycle.
B)   reduction.
C)   fermentation.
D)   oxidation.
E)   photophosphorylation.F) A) and B)
G) B) and E)

Question 6

Carbon fixation occurs during the light- independent phase of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following statements are true? 1- Electron carriers are located at ribosomes. 2- ATP is a common intermediate between catabolic and anabolic pathways.
3- ATP is used for the long- term storage of energy and so is often found in storage granules. 4- Anaerobic organisms are capable of generating ATP via respiration.
5- ATP can be generated by the flow of protons across protein channels.

Accepted Answer

A)   1, 2, 3
B)   1, 3, 4
C)   2, 3, 5
D)   2, 4, 5
E)   All of the statements are true.F) C) and E)
G) B) and C)

Question 8

Which of the following statements regarding metabolism is FALSE?

Accepted Answer

A)   Heat may be released in both anabolic and catabolic reactions.
B)   ADP is formed in anabolic reactions.
C)   ATP is formed in catabolic reactions.
D)   Anabolic reactions are degradative.E) None of the above
F) A) and B)

Question 9

Which of the following is NOT necessary for respiration?

Accepted Answer

A)   quinones
B)   flavoproteins
C)   oxygen
D)   cytochromes
E)   a source of electronsF) All of the above
G) C) and D)

Question 10

A strictly fermentative bacterium produces energy

Accepted Answer

A)   by aerobic respiration only.
B)   only in the absence of oxygen.
C)   by glycolysis only.
D)   only in the presence of oxygen.
E)   by fermentation or aerobic respiration.F) C) and E)
G) C) and D)

Question 11

The use of enzymes is necessary to increase the activation energy requirements of a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 12

A urease test is used to identify Myobacterium tuberculosis because

Accepted Answer

A)   M. bovis can cause tuberculosis.
B)   some bacteria reduce nitrate ion.
C)   urea accumulates during tuberculosis.
D)   M. tuberculosis produces urease.
E)   urease is a sign of tuberculosis.F) B) and C)
G) C) and D)

Question 13

Figure 5.5
 
-Which of the graphs in Figure 5.5 best illustrates the activity of an enzyme that is saturated with substrate?

Accepted Answer

A)   a
B)   b
C)   c
D)   d
E)   eF) A) and E)
G) D) and E)

Question 14

An enzyme, citrate synthase, in the Krebs cycle is inhibited by ATP. This is an example of all of the following EXCEPT

Accepted Answer

A)   feedback inhibition.
B)   competitive inhibition.
C)   noncompetitive inhibition.
D)   allosteric inhibition.E) A) and B)
F) All of the above

Question 15

If a cell is starved for ATP, which of the following pathways would most likely be shut down?

Accepted Answer

A)   glycolysis
B)   Kreb's cycle
C)   pentose phosphate pathway
D)   Krebs cycle and glycolysisE) None of the above
F) B) and C)

Question 16

Which of the following is the best definition of oxidative phosphorylation?

Accepted Answer

A)   A proton gradient allows hydrogen ions to flow back into the cells through transmembrane protein channels, releasing energy that is used to generate ATP.
B)   Electrons are passed through a series of carriers to O2.
C)   Electrons are passed through a series of carriers to an organic compound.
D)   ATP is directly transferred from a substrate to ADP.E) None of the above
F) A) and B)

Question 17

Figure 5.7
 
-The graph at the left in Figure 5.7 shows the reaction rate for an enzyme at its optimum temperature. Which graph shows enzyme activity at a higher temperature?

Accepted Answer

A)   a
B)   b
C)   c
D)   dE) None of the above
F) C) and D)

Question 18

The advantage of the pentose phosphate pathway is that it produces all of the following EXCEPT

Accepted Answer

A)   precursors for the synthesis of glucose.
B)   NADPH.
C)   three ATPs.
D)   precursors for the synthesis of amino acids.
E)   precursors for nucleic acids.F) A) and B)
G) B) and E)

Question 19

Figure 5.2
 
-What type of reaction is in Figure 5.2?

Accepted Answer

A)   reduction
B)   transamination
C)   dehydrogenation
D)   decarboxylation
E)   oxidationF) A) and E)
G) A) and D)

Question 20

Which organism is NOT correctly matched to its energy source?

Accepted Answer

A)   chemoautotroph - Fe2+
B)   chemoheterotroph - glucose
C)   chemoautotroph- NH3
D)   photoheterotroph - light
E)   photoautotroph - CO2F) C) and E)
G) All of the above

Exam 5: Microbial Metabolism

Glycolysis is utilized by cells in both respiration and fermentation.

Correct Answer
verified

The advantage of the pentose phosphate pathway is that it produces all of the following EXCEPT

Correct Answer
verified

Which of the following uses CO₂for carbon and H₂for energy?

Correct Answer
verified

Figure 5.7 -The graph at the left in Figure 5.7 shows the reaction rate for an enzyme at its optimum temperature. Which graph shows enzyme activity at a higher temperature?

Correct Answer
verified

Figure 5.2 -What type of reaction is in Figure 5.2?

Correct Answer
verified

If a cell is starved for ATP, which of the following pathways would most likely be shut down?

Correct Answer
verified

Which of the following is the best definition of oxidative phosphorylation?

Correct Answer
verified

A urease test is used to identify Myobacterium tuberculosis because

Correct Answer
verified

Which of the following is NOT necessary for respiration?

Correct Answer
verified

Carbon fixation occurs during the light- independent phase of photosynthesis.

Correct Answer
verified

Gallionella bacteria can get energy from the reaction Fe²⁺-Fe³⁺. This reaction is an example of

Correct Answer
verified

Which organism is NOT correctly matched to its energy source?

Correct Answer
verified

Figure 5.5 -Which of the graphs in Figure 5.5 best illustrates the activity of an enzyme that is saturated with substrate?

Correct Answer
verified

An enzyme, citrate synthase, in the Krebs cycle is inhibited by ATP. This is an example of all of the following EXCEPT

Correct Answer
verified

Which of the following statements regarding metabolism is FALSE?

Correct Answer
verified

The pentose phosphate pathway can be characterized as an anabolic pathway.

Correct Answer
verified

The use of enzymes is necessary to increase the activation energy requirements of a chemical reaction.

Correct Answer
verified

Correct Answer
verified

In noncyclic photophosphorylation, O₂is released from

Correct Answer
verified

A strictly fermentative bacterium produces energy

Correct Answer
verified

Exam 5: Microbial Metabolism

Glycolysis is utilized by cells in both respiration and fermentation.

Correct AnswerverifiedShow Answer

The advantage of the pentose phosphate pathway is that it produces all of the following EXCEPT

Correct AnswerverifiedShow Answer

Which of the following uses CO2 for carbon and H2 for energy?

Correct AnswerverifiedShow Answer

Figure 5.7 -The graph at the left in Figure 5.7 shows the reaction rate for an enzyme at its optimum temperature. Which graph shows enzyme activity at a higher temperature?

Correct AnswerverifiedShow Answer

Figure 5.2 -What type of reaction is in Figure 5.2?

Correct AnswerverifiedShow Answer

If a cell is starved for ATP, which of the following pathways would most likely be shut down?

Correct AnswerverifiedShow Answer

Which of the following is the best definition of oxidative phosphorylation?

Correct AnswerverifiedShow Answer

A urease test is used to identify Myobacterium tuberculosis because

Correct AnswerverifiedShow Answer

Which of the following is NOT necessary for respiration?

Correct AnswerverifiedShow Answer

Carbon fixation occurs during the light- independent phase of photosynthesis.

Correct AnswerverifiedShow Answer

Gallionella bacteria can get energy from the reaction Fe2+ -Fe3+. This reaction is an example of

Correct AnswerverifiedShow Answer

Which organism is NOT correctly matched to its energy source?

Correct AnswerverifiedShow Answer

Figure 5.5 -Which of the graphs in Figure 5.5 best illustrates the activity of an enzyme that is saturated with substrate?

Correct AnswerverifiedShow Answer

An enzyme, citrate synthase, in the Krebs cycle is inhibited by ATP. This is an example of all of the following EXCEPT

Correct AnswerverifiedShow Answer

Which of the following statements regarding metabolism is FALSE?

Correct AnswerverifiedShow Answer

The pentose phosphate pathway can be characterized as an anabolic pathway.

Correct AnswerverifiedShow Answer

The use of enzymes is necessary to increase the activation energy requirements of a chemical reaction.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In noncyclic photophosphorylation, O2 is released from

Correct AnswerverifiedShow Answer

A strictly fermentative bacterium produces energy

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Which of the following uses CO₂for carbon and H₂for energy?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Gallionella bacteria can get energy from the reaction Fe²⁺-Fe³⁺. This reaction is an example of

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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In noncyclic photophosphorylation, O₂is released from

Correct Answer
verified

Correct Answer
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