Question 1

The electron transport chain is a multistep process that relies on five enzyme systems as well as mobile electron carriers.

Accepted Answer

A) True 
 B)False  False

Question 2

Which is the major product of stage [2] of catabolism?

Accepted Answer

A) NADH 
B) Acetyl CoA 
C) GTP 
D) CO2 
A) NADH 
B) Acetyl CoA 
C) GTP 
D) CO2 B

Question 3

Acetyl CoA contains an acetyl group bonded to coenzyme A by a thioester bond.

Accepted Answer

A) True 
 B)False  True

Question 4

The conversion of Fe3+ to Fe2+ in the electron transport chain is an example of Fe3+ acting as an oxidizing agent.

Accepted Answer

A) True 
 B)False

Question 5

In which region of a mitochondrion would the pH be lower?

Accepted Answer

A) The matrix 
B) The intermembrane space 
C) The inner mitochondrial membrane 
D) All regions of a mitochondrion have the same pH 
A) The matrix 
B) The intermembrane space 
C) The inner mitochondrial membrane 
D) All regions of a mitochondrion have the same pH

Question 6

How many carbons enter into the citric acid cycle with each new Acetyl CoA?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6 
A) 1 
B) 2 
C) 4 
D) 6

Question 7

What is the classification of the reaction shown?

Accepted Answer

A) Oxidation 
B) Reduction 
C) Decarboxylation 
D) Hydrolysis 
E) Isomerization 
A) Oxidation 
B) Reduction 
C) Decarboxylation 
D) Hydrolysis 
E) Isomerization

Question 8

At which stage of metabolism is the most energy in the form of ATP produced?

Accepted Answer

A) Electron transport chain and oxidative phosphorylation 
B) Digestion 
C) Citric acid cycle 
D) Transcription 
A) Electron transport chain and oxidative phosphorylation 
B) Digestion 
C) Citric acid cycle 
D) Transcription

Question 9

GTP is a high energy compound.

Accepted Answer

A) True 
 B)False

Question 10

Where does the hydrolysis of carbohydrates to monosaccharides begin?

Accepted Answer

A) In the stomach 
B) In the saliva 
C) In the liver 
D) In the small intestines 
A) In the stomach 
B) In the saliva 
C) In the liver 
D) In the small intestines

Question 11

Which intermediate in the citric acid cycle is a secondary alcohol?

Accepted Answer

A)    
B)    
C)    
D)    
E) Two of the intermediates are secondary alcohols. 
A)    
B)    
C)    
D)    
E) Two of the intermediates are secondary alcohols.

Question 12

Step 7 of the citric acid cycle is shown. Which statement best describes what occurs in this step?

Accepted Answer

A) Fumarate undergoes hydrolysis with the aid of the enzyme fumarase. 
B) Fumarate undergoes reduction with the aid of the cofactor fumarase. 
C) Fumarate undergoes hydrogenation with hydrogens and electrons provided by the enzyme fumarase. 
D) Fumarate undergoes hydration with the aid of the enzyme fumarase. 
A) Fumarate undergoes hydrolysis with the aid of the enzyme fumarase. 
B) Fumarate undergoes reduction with the aid of the cofactor fumarase. 
C) Fumarate undergoes hydrogenation with hydrogens and electrons provided by the enzyme fumarase. 
D) Fumarate undergoes hydration with the aid of the enzyme fumarase.

Question 13

________ is a coenzyme synthesized in cells from vitamin B2,riboflavin.

Accepted Answer

Question 14

Coenzyme A is a biological oxidizing agent used to convert alcohols to carbonyl-containing compounds.

Accepted Answer

A) True 
 B)False

Question 15

Any process,such as walking,running,swallowing,or breathing,is fueled by the release of energy from the phosphorylation of ADP to ATP.

Accepted Answer

A) True 
 B)False

Question 16

Anabolism is an energy releasing process that involves the synthesis of large molecules from smaller ones.

Accepted Answer

A) True 
 B)False

Question 17

The hydrolysis of ATP is an energy-requiring reaction that cleaves one phosphate group,forming ADP and hydrogen phosphate,(HPO42-).

Accepted Answer

A) True 
 B)False

Question 18

Which product(s)of the citric acid cycle are funneled into the electron transport chain?

Accepted Answer

A) ATP 
B) NAD+ and FAD 
C) NADH,FADH2,and H+ 
D) NADH,FADH2,H+,and ATP 
A) ATP 
B) NAD+ and FAD 
C) NADH,FADH2,and H+ 
D) NADH,FADH2,H+,and ATP

Question 19

Two electrons are donated by each NADH in the electron transport chain.

Accepted Answer

A) True 
 B)False

Question 20

The citric acid cycle is also called the tricarboxylic acid cycle (TCA cycle).

Accepted Answer

A) True 
 B)False

Exam 23: Metabolism and Energy Production

The electron transport chain is a multistep process that relies on five enzyme systems as well as mobile electron carriers.

Which is the major product of stage [2] of catabolism?

Acetyl CoA contains an acetyl group bonded to coenzyme A by a thioester bond.

The conversion of Fe3+ to Fe2+ in the electron transport chain is an example of Fe3+ acting as an oxidizing agent.

In which region of a mitochondrion would the pH be lower?

How many carbons enter into the citric acid cycle with each new Acetyl CoA?

What is the classification of the reaction shown?

At which stage of metabolism is the most energy in the form of ATP produced?

GTP is a high energy compound.

Where does the hydrolysis of carbohydrates to monosaccharides begin?

Which intermediate in the citric acid cycle is a secondary alcohol?

Step 7 of the citric acid cycle is shown. Which statement best describes what occurs in this step?

________ is a coenzyme synthesized in cells from vitamin B2,riboflavin.

Coenzyme A is a biological oxidizing agent used to convert alcohols to carbonyl-containing compounds.

Any process,such as walking,running,swallowing,or breathing,is fueled by the release of energy from the phosphorylation of ADP to ATP.

Anabolism is an energy releasing process that involves the synthesis of large molecules from smaller ones.

The hydrolysis of ATP is an energy-requiring reaction that cleaves one phosphate group,forming ADP and hydrogen phosphate,(HPO42-).

Which product(s)of the citric acid cycle are funneled into the electron transport chain?

Two electrons are donated by each NADH in the electron transport chain.

The citric acid cycle is also called the tricarboxylic acid cycle (TCA cycle).

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Carbohydrate,lipid,and Protein Metabolism

Filters

The conversion of Fe³⁺ to Fe²⁺ in the electron transport chain is an example of Fe³⁺ acting as an oxidizing agent.

________ is a coenzyme synthesized in cells from vitamin B₂,riboflavin.

The hydrolysis of ATP is an energy-requiring reaction that cleaves one phosphate group,forming ADP and hydrogen phosphate,(HPO₄^2-).