Question 1

Which of the following metabolic pathways can occur in the absence of oxygen?

Accepted Answer

A) electron transport 
B) oxidative phosphorylation 
C) citric acid cycle 
D) glycolysis 
E) β-oxidation 
A) electron transport 
B) oxidative phosphorylation 
C) citric acid cycle 
D) glycolysis 
E) β-oxidation D

Question 2

In the third major step of the citric acid cycle, NAD+ is converted to

Accepted Answer

A) NAS-. 
B) NAD2+. 
C) NADH2. 
D) NAD. 
E) NADH. 
A) NAS-. 
B) NAD2+. 
C) NADH2. 
D) NAD. 
E) NADH. E

Question 3

Citrate is one of the products of the citric acid cycle.

Accepted Answer

A) True 
 B)False  False

Question 4

NAD+ acts as a hydrogen acceptor in metabolic reactions.

Accepted Answer

A) True 
 B)False

Question 5

Which coenzyme is the electron acceptor in the following reaction?

Accepted Answer

A) FAD 
B) NAD+ 
C) FMN 
D) NADH 
E) FADH2 
A) FAD 
B) NAD+ 
C) FMN 
D) NADH 
E) FADH2

Question 6

In this figure, depicting part 1 of the Citric Acid Cycle, taken from your text, identify the substances numbered.  
-Substance 13

Accepted Answer

The answer of In this figure, depicting part 1 of...

Question 7

In the chemiosmotic model, protons circulate through a protein complex called

Accepted Answer

A) Cyt c. 
B) FMN. 
C) Complex III. 
D) CoQ. 
E) ATP synthase. 
A) Cyt c. 
B) FMN. 
C) Complex III. 
D) CoQ. 
E) ATP synthase.

Question 8

Overall, one turn of the citric acid cycle produces

Accepted Answer

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

Question 9

In this figure depicting the Stages of Metabolism taken from your text, identify the metabolic substance numbered.  
-Substance 1

Accepted Answer

The answer of In this figure depicting the Stages of...

Question 10

NAD+ participates in reactions that produce

Accepted Answer

A) a CH2 group. 
B) a C=O bond. 
C) phosphorylation. 
D) ADP from ATP. 
E) a C-C bond. 
A) a CH2 group. 
B) a C=O bond. 
C) phosphorylation. 
D) ADP from ATP. 
E) a C-C bond.

Question 11

In reaction 4 of the citric acid cycle, α-ketoglutarase, a five-carbon keto acid, is decarboxylated.

Accepted Answer

A) True 
 B)False

Question 12

The compounds in the respiratory chain that remove hydrogen ions and electrons from NADH are classified as

Accepted Answer

A) oxidative transporters. 
B) osmotic carriers. 
C) electron carriers. 
D) phosphorylators. 
E) citrates. 
A) oxidative transporters. 
B) osmotic carriers. 
C) electron carriers. 
D) phosphorylators. 
E) citrates.

Question 13

In this figure, depicting part 1 of the Citric Acid Cycle, taken from your text, identify the substances numbered.  
-Substance 18

Accepted Answer

The answer of In this figure, depicting part 1 of...

Question 14

Which coenzyme is the electron acceptor in the following reaction?

Accepted Answer

A) FAD 
B) NAD+ 
C) FMN 
D) NADH 
E) FADH2 
A) FAD 
B) NAD+ 
C) FMN 
D) NADH 
E) FADH2

Question 15

The oxidation of FADH2 yields 1.5 ATP.

Accepted Answer

A) True 
 B)False

Question 16

In electron transport, the synthesis of ATP from ADP + Pi is called

Accepted Answer

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

Question 17

The oxidation of NADH yields 2.5 ATP.

Accepted Answer

A) True 
 B)False

Question 18

In the hydrolysis of succinyl CoA in step 5 of the citric acid cycle, CoA is released as

Accepted Answer

A) HS-CoA. 
B) HO-CoA. 
C) CoA-O-. 
D) CoA-S-. 
E) CoA-COO-. 
A) HS-CoA. 
B) HO-CoA. 
C) CoA-O-. 
D) CoA-S-. 
E) CoA-COO-.

Question 19

Which of the three major stages of metabolism includes the citric acid cycle?

Accepted Answer

A) Stage one 
B) Stage two 
C) Stage three 
A) Stage one 
B) Stage two 
C) Stage three

Question 20

12 ATP are produced when glucose is oxidized to CO2 and H2O.

Accepted Answer

A) True 
 B)False

Exam 23: Metabolism and Energy Production

Which of the following metabolic pathways can occur in the absence of oxygen?

In the third major step of the citric acid cycle, NAD+ is converted to

Citrate is one of the products of the citric acid cycle.

NAD+ acts as a hydrogen acceptor in metabolic reactions.

Which coenzyme is the electron acceptor in the following reaction?

In this figure, depicting part 1 of the Citric Acid Cycle, taken from your text, identify the substances numbered. -Substance 13

In the chemiosmotic model, protons circulate through a protein complex called

Overall, one turn of the citric acid cycle produces

In this figure depicting the Stages of Metabolism taken from your text, identify the metabolic substance numbered. -Substance 1

NAD+ participates in reactions that produce

In reaction 4 of the citric acid cycle, α-ketoglutarase, a five-carbon keto acid, is decarboxylated.

The compounds in the respiratory chain that remove hydrogen ions and electrons from NADH are classified as

In this figure, depicting part 1 of the Citric Acid Cycle, taken from your text, identify the substances numbered. -Substance 18

Which coenzyme is the electron acceptor in the following reaction?

The oxidation of FADH2 yields 1.5 ATP.

In electron transport, the synthesis of ATP from ADP + Pi is called

The oxidation of NADH yields 2.5 ATP.

In the hydrolysis of succinyl CoA in step 5 of the citric acid cycle, CoA is released as

Which of the three major stages of metabolism includes the citric acid cycle?

12 ATP are produced when glucose is oxidized to CO2 and H2O.

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