Question 1

A bacterial culture grown in a glucose-peptide medium causes the pH to increase. The bacteria are most likely

Accepted Answer

A)   oxidizing the glucose.
B)   not growing.
C)   using the peptides.
D)   fermenting the glucose.

Question 2

Microorganisms that catabolize sugars into ethanol and hydrogen gas would most likely be categorized as

Accepted Answer

A)   anaerobic respirers.
B)   homolactic fermenters.
C)   alcohol fermenters.
D)   aerobic respirers.
E)   heterolactic fermenters.

Question 3

Catabolic reactions are generally degradative and hydrolytic.

Accepted Answer

A) True 
 B)False

Question 4

Figure 5.8
 
-In Figure 5.8, the path labeled ʺ2ʺ is the flow of

Accepted Answer

A)   energy.
B)   electrons.
C)   water.
D)   protons.
E)   glucose.

Question 5

Which of the following statements about substrate-level phosphorylation is FALSE?

Accepted Answer

A)   It occurs in glycolysis.
B)   It involves the direct transfer of a high-energy phosphate group from an intermediate metabolic compound to ADP.
C)   No final electron acceptor is required.
D)   It occurs to a lesser degree in the Krebs cycle than in glycolysis.
E)   The oxidation of intermediate metabolic compounds releases energy that is used to generate ATP.

Question 6

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

Accepted Answer

A)   Krebʹs cycle
B)   pentose phosphate pathway
C)   glycolysis
D)   Krebs cycle and glycolysis

Question 7

Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeasts are growing well on the maltose medium but are not producing alcohol. What is the most likely explanation?

Accepted Answer

A)   Not enough protein is provided.
B)   o2 is in the medium.
C)   The temperature is too low.
D)   The temperature is too high.
E)   The maltose is toxic.

Question 8

Which of the following compounds is NOT an enzyme?

Accepted Answer

A)   dehydrogenase
B)   sucrase
C)   cellulase
D)   β-galactosidase
E)   coenzyme A

Question 9

Figure 5.4  How is ATP generated in the reaction shown in Figure 5.4?

Accepted Answer

A)   glycolysis
B)   oxidative phosphorylation
C)   photophosphorylation
D)   fermentation
E)   substrate-level phosphorylation

Question 10

In general, ATP is generated in catabolic pathways and expended in anabolic pathways.

Accepted Answer

A) True 
 B)False

Question 11

Fatty acids are oxidized in

Accepted Answer

A)   the Krebs cycle.
B)   the Entner-Doudoroff pathway.
C)   the pentose phosphate pathway.
D)   the electron transport chain.
E)   glycolysis.

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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)   d

Question 14

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, 4, 5
D)   2, 3, 5
E)   All of the statements are true.

Question 15

Figure 5.8
 
-Refer to Figure 5.8. In aerobic respiration, where is water formed?

Accepted Answer

A)   a
B)   b
C)   c
D)   d
E)   e

Question 16

Figure 5.2  What type of reaction is in Figure 5.2?

Accepted Answer

A)   decarboxylation
B)   dehydrogenation
C)   oxidation
D)   reduction
E)   transamination

Question 17

Figure 5.1  Which compound is being reduced in the reaction shown in Figure 5.1?

Accepted Answer

A)   α-ketoglutaric acid and NAD+
B)   NADH and isocitric acid
C)   NADH
D)   isocitric acid and α-ketoglutaric acid
E)   NAD+

Question 18

Figure 5.6 2 and glucose consumption by a bacterial culture are shown in Figure 5.6. Assume a bacterial culture was grown in a glucose medium without o2. Then o2 was added at the time marked X. The data indicate that A)  these bacteria cannot grow anaerobically. B)  these bacteria get more energy anaerobically. C)  aerobic metabolism is more efficient than fermentation. D)  these bacteria donʹt use o2." class="answers-bank-image d-inline" rel="preload" > The rates of o2 and glucose consumption by a bacterial culture are shown in Figure 5.6. Assume a bacterial culture was grown in a glucose medium without o2. Then o2 was added at the time marked X. The data indicate that

Accepted Answer

A)   these bacteria cannot grow anaerobically.
B)   these bacteria get more energy anaerobically.
C)   aerobic metabolism is more efficient than fermentation.
D)   these bacteria donʹt use o2.

Question 19

You look in the refrigerator and find some orange drink you had forgotten was there. The drink now has an
ʺoffʺ taste and bubbles. What is the most likely explanation for the changes in the drink?

Accepted Answer

The answer of You look in the refrigerator and find...

Question 20

An apoenzyme that loses its coenzyme subunit will be non -functional.

Accepted Answer

A) True 
 B)False

Exam 5: Microbial Metabolism

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

Correct Answer
verified

Microorganisms that catabolize sugars into ethanol and hydrogen gas would most likely be categorized as

Correct Answer
verified

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

Correct Answer
verified

You look in the refrigerator and find some orange drink you had forgotten was there. The drink now has an ʺoffʺ taste and bubbles. What is the most likely explanation for the changes in the drink?

Correct Answer
verified

In general, ATP is generated in catabolic pathways and expended in anabolic pathways.

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

Which of the following compounds is NOT an enzyme?

Correct Answer
verified

An apoenzyme that loses its coenzyme subunit will be non -functional.

Correct Answer
verified

Fatty acids are oxidized in

Correct Answer
verified

Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeasts are growing well on the maltose medium but are not producing alcohol. What is the most likely explanation?

Correct Answer
verified

Figure 5.4 How is ATP generated in the reaction shown in Figure 5.4?

Correct Answer
verified

Figure 5.1 Which compound is being reduced in the reaction shown in Figure 5.1?

Correct Answer
verified

Figure 5.8 -In Figure 5.8, the path labeled ʺ2ʺ is the flow of

Correct Answer
verified

Which of the following statements about substrate-level phosphorylation is FALSE?

Correct Answer
verified

A bacterial culture grown in a glucose-peptide medium causes the pH to increase. The bacteria are most likely

Correct Answer
verified

Catabolic reactions are generally degradative and hydrolytic.

Correct Answer
verified

Correct Answer
verified

Figure 5.6 The rates of o₂ and glucose consumption by a bacterial culture are shown in Figure 5.6. Assume a bacterial culture was grown in a glucose medium without o₂. Then o₂ was added at the time marked X. The data indicate that

Correct Answer
verified

Figure 5.8 -Refer to Figure 5.8. In aerobic respiration, where is water formed?

Correct Answer
verified

Exam 5: Microbial Metabolism

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

Correct AnswerverifiedShow Answer

Microorganisms that catabolize sugars into ethanol and hydrogen gas would most likely be categorized as

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

You look in the refrigerator and find some orange drink you had forgotten was there. The drink now has an ʺoffʺ taste and bubbles. What is the most likely explanation for the changes in the drink?

Correct AnswerverifiedShow Answer

In general, ATP is generated in catabolic pathways and expended in anabolic pathways.

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

Which of the following compounds is NOT an enzyme?

Correct AnswerverifiedShow Answer

An apoenzyme that loses its coenzyme subunit will be non -functional.

Correct AnswerverifiedShow Answer

Fatty acids are oxidized in

Correct AnswerverifiedShow Answer

Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeasts are growing well on the maltose medium but are not producing alcohol. What is the most likely explanation?

Correct AnswerverifiedShow Answer

Figure 5.4 How is ATP generated in the reaction shown in Figure 5.4?

Correct AnswerverifiedShow Answer

Figure 5.1 Which compound is being reduced in the reaction shown in Figure 5.1?

Correct AnswerverifiedShow Answer

Figure 5.8 -In Figure 5.8, the path labeled ʺ2ʺ is the flow of

Correct AnswerverifiedShow Answer

Which of the following statements about substrate-level phosphorylation is FALSE?

Correct AnswerverifiedShow Answer

A bacterial culture grown in a glucose-peptide medium causes the pH to increase. The bacteria are most likely

Correct AnswerverifiedShow Answer

Catabolic reactions are generally degradative and hydrolytic.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Figure 5.6 The rates of o2 and glucose consumption by a bacterial culture are shown in Figure 5.6. Assume a bacterial culture was grown in a glucose medium without o2. Then o2 was added at the time marked X. The data indicate that

Correct AnswerverifiedShow Answer

Figure 5.8 -Refer to Figure 5.8. In aerobic respiration, where is water formed?

Correct AnswerverifiedShow Answer

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Figure 5.6 The rates of o₂ and glucose consumption by a bacterial culture are shown in Figure 5.6. Assume a bacterial culture was grown in a glucose medium without o₂. Then o₂ was added at the time marked X. The data indicate that

Correct Answer
verified

Correct Answer
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