Question 1

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

Accepted Answer

A)  iron-sulfur clusters. 
B)  FMA. 
C)  CoA. 
D)  CoQ. 
E)  ATP synthase. 
A)  iron-sulfur clusters. 
B)  FMA. 
C)  CoA. 
D)  CoQ. 
E)  ATP synthase. E

Question 2

The complete oxidation of glucose produces __________ ATP molecules.

Accepted Answer

A)  2 
B)  8 
C)  12 
D)  24 
E)  36 
A)  2 
B)  8 
C)  12 
D)  24 
E)  36 E

Question 3

The citric acid cycle is used in the oxidation of

Accepted Answer

A)  glucose only. 
B)  glucose and fatty acids only. 
C)  fatty acids only. 
D)  glucose, fatty acids, and proteins. 
E)  proteins only. 
A)  glucose only. 
B)  glucose and fatty acids only. 
C)  fatty acids only. 
D)  glucose, fatty acids, and proteins. 
E)  proteins only. D

Question 4

In this figure depicting the Stages of Metabolism taken from your text, identify the metabolic substance numbered.  
-substance 2

Accepted Answer

carbohydra

Question 5

Identify each of the following metabolic pathways.
-the conversion of glucose to pyruvic acid

Accepted Answer

A) glycolysis 
B) electron transport 
C) citric acid cycle 
A) glycolysis 
B) electron transport 
C) citric acid cycle

Question 6

The citric acid cycle takes place in the

Accepted Answer

A)  mitochondria. 
B)  cytosol. 
C)  cytoplasm. 
D)  Golgi apparatus. 
E)  endoplasmic reticulum. 
A)  mitochondria. 
B)  cytosol. 
C)  cytoplasm. 
D)  Golgi apparatus. 
E)  endoplasmic reticulum.

Question 7

Another name for the citric acid cycle is

Accepted Answer

A)  the Krebs cycle. 
B)  gluconeogenesis. 
C)  glucose hydrolysis. 
D)  oxidative phosphorylation. 
E)  the chemiosmotic pump. 
A)  the Krebs cycle. 
B)  gluconeogenesis. 
C)  glucose hydrolysis. 
D)  oxidative phosphorylation. 
E)  the chemiosmotic pump.

Question 8

Electron transport is also called

Accepted Answer

A)  the citric acid cycle. 
B)  β-oxidation. 
C)  transamination. 
D)  the respiratory chain. 
E)  fermentation. 
A)  the citric acid cycle. 
B)  β-oxidation. 
C)  transamination. 
D)  the respiratory chain. 
E)  fermentation.

Question 9

FAD is a coenzyme which usually participates in

Accepted Answer

A)  oxidation of alcohols to aldehydes. 
B)  formation of carbon-carbon double bonds. 
C)  decarboxylation reactions. 
D)  phosphorylation reactions. 
E)  β-oxidation reactions. 
A)  oxidation of alcohols to aldehydes. 
B)  formation of carbon-carbon double bonds. 
C)  decarboxylation reactions. 
D)  phosphorylation reactions. 
E)  β-oxidation reactions.

Question 10

The citric acid cycle operates only under aerobic conditions because

Accepted Answer

A)  oxygen is a reactant in the citric acid cycle. 
B)  oxygen is a product of the citric acid cycle. 
C)  CO₂ is a product of the citric acid cycle. 
D)  the NADH and FADH₂ produced by the citric acid cycle can only be reoxidized by the electron transport chain. 
E)  the NAD+ and FAD produced by the citric acid cycle can only be reduced by the electron transport chain. 
A)  oxygen is a reactant in the citric acid cycle. 
B)  oxygen is a product of the citric acid cycle. 
C)  CO₂ is a product of the citric acid cycle. 
D)  the NADH and FADH₂ produced by the citric acid cycle can only be reoxidized by the electron transport chain. 
E)  the NAD+ and FAD produced by the citric acid cycle can only be reduced by the electron transport chain.

Question 11

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

Accepted Answer

A)  CoA-SH. 
B)  CoA-OH. 
C)  CoA-O-. 
D)  CoA- S- 
E)  CoA- COO-. 
A)  CoA-SH. 
B)  CoA-OH. 
C)  CoA-O-. 
D)  CoA- S- 
E)  CoA- COO-.

Question 12

The process which requires oxygen to produce carbon dioxide and water is called

Accepted Answer

A)  fermentation. 
B)  reduction. 
C)  decomposition. 
D)  oxidation. 
E)  respiration. 
A)  fermentation. 
B)  reduction. 
C)  decomposition. 
D)  oxidation. 
E)  respiration.

Question 13

In glycolysis, glucose produces 2 pyruvate ions and a total of __________ ATP molecules.

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
E)  12 
A)  2 
B)  4 
C)  6 
D)  8 
E)  12

Question 14

One method of regulation of the citric acid cycle is

Accepted Answer

A)  allosteric control. 
B)  osmosis. 
C)  temperature control. 
D)  carbon dioxide production. 
E)  water concentration. 
A)  allosteric control. 
B)  osmosis. 
C)  temperature control. 
D)  carbon dioxide production. 
E)  water concentration.

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

In electron transport, the three protein complexes (I, III, and IV)

Accepted Answer

A)  act as proton pumps, which generate a proton gradient. 
B)  transfer electrons from NAD+ to O₂. 
C)  transfer electrons from FAD to O₂. 
D)  act as electron pumps, which generate an electron gradient. 
E)  act as Ca2+ pumps, which generate a Ca2+ gradient. 
A)  act as proton pumps, which generate a proton gradient. 
B)  transfer electrons from NAD+ to O₂. 
C)  transfer electrons from FAD to O₂. 
D)  act as electron pumps, which generate an electron gradient. 
E)  act as Ca2+ pumps, which generate a Ca2+ gradient.

Question 18

In this figure, depicting part 1 of the Citric Acid Cycle, taken from your text, identify the substances numbered.  
-substance 17

Accepted Answer

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

Question 19

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

Accepted Answer

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

Question 20

In this figure depicting the Stages of Metabolism taken from your text, identify the metabolic substance numbered.  
-substance 8

Accepted Answer

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

Exam 23: Metabolism and Energy Production

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

The complete oxidation of glucose produces __________ ATP molecules.

The citric acid cycle is used in the oxidation of

In this figure depicting the Stages of Metabolism taken from your text, identify the metabolic substance numbered. -substance 2

Identify each of the following metabolic pathways. -the conversion of glucose to pyruvic acid

The citric acid cycle takes place in the

Another name for the citric acid cycle is

Electron transport is also called

FAD is a coenzyme which usually participates in

The citric acid cycle operates only under aerobic conditions because

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

The process which requires oxygen to produce carbon dioxide and water is called

In glycolysis, glucose produces 2 pyruvate ions and a total of __________ ATP molecules.

One method of regulation of the citric acid cycle is

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

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

In electron transport, the three protein complexes (I, III, and IV)

In this figure, depicting part 1 of the Citric Acid Cycle, taken from your text, identify the substances numbered. -substance 17

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

In this figure depicting the Stages of Metabolism taken from your text, identify the metabolic substance numbered. -substance 8

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