Question 1

Overall, one turn of the citric acid cycle produces

Accepted Answer

A) two FADH2 molecules. 
B) three NADH molecules. 
C) three CO2 molecules. 
D) 6 ATP. 
E) 2 GTP. 
A) two FADH2 molecules. 
B) three NADH molecules. 
C) three CO2 molecules. 
D) 6 ATP. 
E) 2 GTP.

Question 2

Another name for the citric acid cycle is

Accepted Answer

A) glucolysis. 
B) glycolysis. 
C) electron transport. 
D) the transamination pathway. 
E) the tricarboxylic acid (TC
A) cycle. 
A) glucolysis. 
B) glycolysis. 
C) electron transport. 
D) the transamination pathway. 
E) the tricarboxylic acid (TC
A) cycle.

Question 3

Uncouplers of ATP synthase

Accepted Answer

A)  transport   through the inner mitochondrial membrane. 
B)  allow   to bypass ATP synthase. 
C)  break down ATP synthase. 
D)  stop pumping   into the intermembrane space. 
E)  bypass CoQ 
A)  transport   through the inner mitochondrial membrane. 
B)  allow   to bypass ATP synthase. 
C)  break down ATP synthase. 
D)  stop pumping   into the intermembrane space. 
E)  bypass CoQ

Question 4

Which of the following compounds in the citric acid cycle undergoes oxidative decarboxylation?

Accepted Answer

A) succinate 
B) succinyl CoA 
C) fumarate 
D) citrate 
E) isocitrate 
A) succinate 
B) succinyl CoA 
C) fumarate 
D) citrate 
E) isocitrate

Question 5

Which is the best choice for the box labeled "Answer" in the illustration below?

Accepted Answer

A)  oxidized carrier B 
B)    
C)  energy 
D)  reduced carrier   
E)  carbon dioxide 
A)  oxidized carrier B 
B)    
C)  energy 
D)  reduced carrier   
E)  carbon dioxide

Question 6

The reduced coenzyme ________ provides 1.5 ATP via electron transport.

Accepted Answer

A) HS-CoA 
B) acetyl CoA 
C) FADH2 
D) NADH 
E) NADPH 
A) HS-CoA 
B) acetyl CoA 
C) FADH2 
D) NADH 
E) NADPH

Question 7

In the chemiosmotic model of oxidative phosphorylation, ATP is synthesized as

Accepted Answer

A)    flows through ATP synthase. 
B)  electrons flow through ATP synthase. 
C)    flows through ATP synthase. 
D)    flows through ATP synthase. 
E)    flows through ATP synthase. 
A)    flows through ATP synthase. 
B)  electrons flow through ATP synthase. 
C)    flows through ATP synthase. 
D)    flows through ATP synthase. 
E)    flows through ATP synthase.

Question 8

When oxygen is in plentiful supply in the cell, pyruvate is converted to

Accepted Answer

A) lactate. 
B) glucose. 
C) fructose. 
D) CoA. 
E) acetyl CoA. 
A) lactate. 
B) glucose. 
C) fructose. 
D) CoA. 
E) acetyl CoA.

Question 9

Cyanide ion and carbon monoxide inhibit

Accepted Answer

A) antibiotic activity. 
B) CoA formation. 
C) CoQ formation. 
D) electron flow between cytochrome c and complex IV. 
E) ATP production. 
A) antibiotic activity. 
B) CoA formation. 
C) CoQ formation. 
D) electron flow between cytochrome c and complex IV. 
E) ATP production.

Question 10

In electron transport, NADH and FADH2 are used to provide

Accepted Answer

A) thiol groups. 
B) oxygen. 
C) electrons and hydrogen ions. 
D) carbon atoms. 
E) water and carbon dioxide. 
A) thiol groups. 
B) oxygen. 
C) electrons and hydrogen ions. 
D) carbon atoms. 
E) water and carbon dioxide.

Question 11

The transformation of citrate to isocitrate in the citric acid cycle requires a(n)________ reaction.

Accepted Answer

A) hydrolysis 
B) decarboxylation 
C) reduction 
D) oxidation 
E) dehydration-hydration 
A) hydrolysis 
B) decarboxylation 
C) reduction 
D) oxidation 
E) dehydration-hydration

Question 12

The energy released during electron transport is used to produce

Accepted Answer

A) glucose. 
B) citric acid. 
C) NADH. 
D) carbon dioxide. 
E) ATP. 
A) glucose. 
B) citric acid. 
C) NADH. 
D) carbon dioxide. 
E) ATP.

Question 13

What coenzyme(s) is(are) used in the citric acid cycle?

Accepted Answer

A)  FMN 
B)  FAD only 
C)    
D)    
E)    
A)  FMN 
B)  FAD only 
C)    
D)    
E)

Question 14

In the oxidation of succinate to fumarate in the citric acid cycle, the coenzyme is

Accepted Answer

A)  CoA. 
B)   NADH 
C)    
D)  FAD. 
E)  acetyl CoA. 
A)  CoA. 
B)   NADH 
C)    
D)  FAD. 
E)  acetyl CoA.

Question 15

In electron transport, the synthesis of ATP from  
is called

Accepted Answer

A)  glycolysis. 
B)  hydrolysis. 
C)  isomerization. 
D)  oxidative phosphorylation. 
E)  fermentation. 
A)  glycolysis. 
B)  hydrolysis. 
C)  isomerization. 
D)  oxidative phosphorylation. 
E)  fermentation.

Question 16

The citric acid cycle reaction that removes the first   molecule is a(n)

Accepted Answer

A) combination. 
B) reduction. 
C) hydrolysis. 
D) oxidative decarboxylation. 
E) carbonylation. 
A) combination. 
B) reduction. 
C) hydrolysis. 
D) oxidative decarboxylation. 
E) carbonylation.

Question 17

In reaction 7 of the citric acid cycle, fumarate is converted to malate by a ________ reaction.

Accepted Answer

A) dehydrogenation 
B) dehydration 
C) hydration 
D) hydrolysis 
E) hydrogenation 
A) dehydrogenation 
B) dehydration 
C) hydration 
D) hydrolysis 
E) hydrogenation

Question 18

participates in reactions that produce

Accepted Answer

A)  ADP from ATP. 
B)  a C-C bond. 
C)  a   group. 
D)  phosphorylation. 
E)  a   bond. 
A)  ADP from ATP. 
B)  a C-C bond. 
C)  a   group. 
D)  phosphorylation. 
E)  a   bond.

Question 19

During the first reaction in the citric acid cycle,

Accepted Answer

A) ATP is synthesized. 
B) HS- CoA is released. 
C) a decomposition occurs. 
D) a decarboxylation occurs. 
E) acetyl CoA is made. 
A) ATP is synthesized. 
B) HS- CoA is released. 
C) a decomposition occurs. 
D) a decarboxylation occurs. 
E) acetyl CoA is made.

Question 20

The complete oxidation of glucose produces ________ ATP molecules.

Accepted Answer

A) 2 
B) 8 
C) 12 
D) 24 
E) 32 
A) 2 
B) 8 
C) 12 
D) 24 
E) 32

Exam 23: Metabolism and Energy Production

Overall, one turn of the citric acid cycle produces

Another name for the citric acid cycle is

Uncouplers of ATP synthase

Which of the following compounds in the citric acid cycle undergoes oxidative decarboxylation?

Which is the best choice for the box labeled "Answer" in the illustration below?

The reduced coenzyme ________ provides 1.5 ATP via electron transport.

In the chemiosmotic model of oxidative phosphorylation, ATP is synthesized as

When oxygen is in plentiful supply in the cell, pyruvate is converted to

Cyanide ion and carbon monoxide inhibit

In electron transport, NADH and FADH2 are used to provide

The transformation of citrate to isocitrate in the citric acid cycle requires a(n)________ reaction.

The energy released during electron transport is used to produce

What coenzyme(s) is(are) used in the citric acid cycle?

In the oxidation of succinate to fumarate in the citric acid cycle, the coenzyme is

In electron transport, the synthesis of ATP from is called

The citric acid cycle reaction that removes the first molecule is a(n)

In reaction 7 of the citric acid cycle, fumarate is converted to malate by a ________ reaction.

participates in reactions that produce

During the first reaction in the citric acid cycle,

The complete oxidation of glucose produces ________ ATP molecules.

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