Question 1

In glycolysis, ATP is consumed in some reactions and produced in others.

Accepted Answer

A) True 
 B)False

Question 2

In the citric acid cycle, carbon dioxide is produced in some reactions, but it is not consumed.

Accepted Answer

A) True 
 B)False

Question 3

For each pair of electrons that passes from NADH to oxygen, three molecules of ATP are formed during oxidative phosphorylation.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following processes occurs in both lactate fermentation and alcohol fermentation?

Accepted Answer

A)  formation of acetyl CoA 
B)  release of carbon dioxide 
C)  pumping of protons 
D)  oxidation of NADH 
E)  activation of ATP synthase 
A)  formation of acetyl CoA 
B)  release of carbon dioxide 
C)  pumping of protons 
D)  oxidation of NADH 
E)  activation of ATP synthase

Question 5

Most of the carriers of the electron transport chain are:

Accepted Answer

A)  in the cytosol. 
B)  in the mitochondrial matrix. 
C)  contained between the outer and inner mitochondrial membranes. 
D)  embedded in the inner mitochondrial membrane. 
E)  embedded in the outer mitochondrial membrane. 
A)  in the cytosol. 
B)  in the mitochondrial matrix. 
C)  contained between the outer and inner mitochondrial membranes. 
D)  embedded in the inner mitochondrial membrane. 
E)  embedded in the outer mitochondrial membrane.

Question 6

Where in the cell does glycolysis occur?

Accepted Answer

A)  the cytosol 
B)  mitochondria 
C)  the nucleus 
D)  the endoplasmic reticulum 
E)  chloroplasts 
A)  the cytosol 
B)  mitochondria 
C)  the nucleus 
D)  the endoplasmic reticulum 
E)  chloroplasts

Question 7

Under anaerobic conditions, yeasts and most plant cells convert pyruvate to:

Accepted Answer

A)  acetyl CoA. 
B)  lactate. 
C)  ethanol and carbon dioxide. 
D)  ATP. 
E)  glucose. 
A)  acetyl CoA. 
B)  lactate. 
C)  ethanol and carbon dioxide. 
D)  ATP. 
E)  glucose.

Question 8

Most of the ATP formed in respiration is produced by reactions associated with:

Accepted Answer

A)  the electron transport chain. 
B)  the citric acid cycle. 
C)  glycolysis. 
D)  fermentation. 
E)  the conversion of pyruvate to acetyl CoA. 
A)  the electron transport chain. 
B)  the citric acid cycle. 
C)  glycolysis. 
D)  fermentation. 
E)  the conversion of pyruvate to acetyl CoA.

Question 9

Which of the following statements about the reactions of glucose oxidation is FALSE?

Accepted Answer

A)  The glucose molecule is hydrolyzed. 
B)  Hydrogen atoms are removed. 
C)  Oxygen is oxidized. 
D)  Energy is released. 
E)  Electrons go from higher to lower energy levels. 
A)  The glucose molecule is hydrolyzed. 
B)  Hydrogen atoms are removed. 
C)  Oxygen is oxidized. 
D)  Energy is released. 
E)  Electrons go from higher to lower energy levels.

Question 10

The number of ATP molecules generated from each NADH produced in the conversion of pyruvate to acetyl CoA is _______.

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 11

The complete oxidation of one molecule of glucose requires two turns around the citric acid cycle.

Accepted Answer

A) True 
 B)False

Question 12

For each molecule of glucose that completes glycolysis, how many NAD+ molecules are reduced?

Accepted Answer

A)  1 
B)  0 
C)  1. 
D)  2 
E)  3 
A)  1 
B)  0 
C)  1. 
D)  2 
E)  3

Question 13

For every molecule of glucose that begins glycolysis, how many molecules of acetyl CoA are produced?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 14

For each pair of electrons passing from NADH to oxygen, how many ATP molecules can be generated?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 15

The number of ATP molecules generated from each NADH produced in glycolysis is _______.

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 16

Cytochromes are unique electron carriers in that they can accept protons as well as electrons.

Accepted Answer

A) True 
 B)False

Question 17

In the citric acid cycle, NADH is produced in some reactions, but it is not consumed.

Accepted Answer

A) True 
 B)False

Question 18

The energy released by the flow of electrons along the electron transport chain is used directly to:

Accepted Answer

A)  form ATP from ADP and phosphate. 
B)  oxidize NADH. 
C)  reduce FAD. 
D)  decarboxylate citrate. 
E)  pump protons. 
A)  form ATP from ADP and phosphate. 
B)  oxidize NADH. 
C)  reduce FAD. 
D)  decarboxylate citrate. 
E)  pump protons.

Question 19

After acetyl CoA enters the citric acid cycle, the coenzyme A portion of the molecule:

Accepted Answer

A)  combines with oxaloacetate. 
B)  combines with citrate. 
C)  is oxidized. 
D)  is reduced. 
E)  is released. 
A)  combines with oxaloacetate. 
B)  combines with citrate. 
C)  is oxidized. 
D)  is reduced. 
E)  is released.

Question 20

As part of the cleavage step in glycolysis, glucose is:

Accepted Answer

A)  converted to glyceraldehyde 3-phosphate and dihydroxyacetone phosphate. 
B)  phosphorylated to glucose 6-phosphate. 
C)  oxidized to 1,3-bisphosphoglycerate. 
D)  reduced to phosphoenolpyruvate. 
E)  converted by the enzyme isomerase to fructose. 
A)  converted to glyceraldehyde 3-phosphate and dihydroxyacetone phosphate. 
B)  phosphorylated to glucose 6-phosphate. 
C)  oxidized to 1,3-bisphosphoglycerate. 
D)  reduced to phosphoenolpyruvate. 
E)  converted by the enzyme isomerase to fructose.

Exam 6: Respiration

In glycolysis, ATP is consumed in some reactions and produced in others.

In the citric acid cycle, carbon dioxide is produced in some reactions, but it is not consumed.

For each pair of electrons that passes from NADH to oxygen, three molecules of ATP are formed during oxidative phosphorylation.

Which of the following processes occurs in both lactate fermentation and alcohol fermentation?

Most of the carriers of the electron transport chain are:

Where in the cell does glycolysis occur?

Under anaerobic conditions, yeasts and most plant cells convert pyruvate to:

Most of the ATP formed in respiration is produced by reactions associated with:

Which of the following statements about the reactions of glucose oxidation is FALSE?

The number of ATP molecules generated from each NADH produced in the conversion of pyruvate to acetyl CoA is _______.

The complete oxidation of one molecule of glucose requires two turns around the citric acid cycle.

For each molecule of glucose that completes glycolysis, how many NAD+ molecules are reduced?

For every molecule of glucose that begins glycolysis, how many molecules of acetyl CoA are produced?

For each pair of electrons passing from NADH to oxygen, how many ATP molecules can be generated?

The number of ATP molecules generated from each NADH produced in glycolysis is _______.

Cytochromes are unique electron carriers in that they can accept protons as well as electrons.

In the citric acid cycle, NADH is produced in some reactions, but it is not consumed.

The energy released by the flow of electrons along the electron transport chain is used directly to:

After acetyl CoA enters the citric acid cycle, the coenzyme A portion of the molecule:

As part of the cleavage step in glycolysis, glucose is:

Botany: an Introduction

The Molecular Composition of Plant Cells

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Photosynthesis, Light, and Life

Sexual Reproduction and Heredity

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

The Process of Evolution

Systematics: the Science of Biological Diversity

Prokaryotes and Viruses

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Gymnosperms

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

Regulating Growth and Development: the Plant Hormones

External Factors and Plant Growth

Plant Nutrition and Soils

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

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For each molecule of glucose that completes glycolysis, how many NAD⁺ molecules are reduced?