Question 1

The end product of glycolysis is:

Accepted Answer

A) two pyruvate molecules. 
B) two citric acid molecules. 
C) one G3P molecule. 
D) one lactate molecule. 
E) two NAD+ molecules. 
A) two pyruvate molecules. 
B) two citric acid molecules. 
C) one G3P molecule. 
D) one lactate molecule. 
E) two NAD+ molecules.

Question 2

The products of the Krebs cycle include:

Accepted Answer

A) ATP only. 
B) carbon dioxide only. 
C) energy carriers only. 
D) carbon dioxide and energy carriers only. 
E) ATP, carbon dioxide, and energy carriers. 
A) ATP only. 
B) carbon dioxide only. 
C) energy carriers only. 
D) carbon dioxide and energy carriers only. 
E) ATP, carbon dioxide, and energy carriers.

Question 3

All of the following are true statements about ATP EXCEPT that it is:

Accepted Answer

A) a short-term energy-storage compound. 
B) the cell's principal compound for energy transfers. 
C) synthesized only within mitochondria. 
D) the molecule that all living cells rely on to do work. 
A) a short-term energy-storage compound. 
B) the cell's principal compound for energy transfers. 
C) synthesized only within mitochondria. 
D) the molecule that all living cells rely on to do work.

Question 4

During glycolysis, two ATP molecules are "spent" in order to convert glucose to the highly reactive molecule:

Accepted Answer

A) glyceraldehyde 3-phosphate. 
B) FADH2. 
C) NADH. 
D) fructose bisphosphate. 
E) pyruvate. 
A) glyceraldehyde 3-phosphate. 
B) FADH2. 
C) NADH. 
D) fructose bisphosphate. 
E) pyruvate.

Question 5

Which kind of metabolic poison would interfere with glycolysis?

Accepted Answer

A) an agent that reacts with oxygen and depletes its concentration in the cell 
B) an agent that binds to pyruvate and inactivates it 
C) an agent that closely mimics the structure of glucose but is not capable of being metabolized 
D) an agent that reacts with NADH and oxidizes it to NAD+ 
E) an agent that inhibits the formation of acetyl coenzyme A 
A) an agent that reacts with oxygen and depletes its concentration in the cell 
B) an agent that binds to pyruvate and inactivates it 
C) an agent that closely mimics the structure of glucose but is not capable of being metabolized 
D) an agent that reacts with NADH and oxidizes it to NAD+ 
E) an agent that inhibits the formation of acetyl coenzyme A

Question 6

During the fermentation of one molecule of glucose, the net production of ATP is:

Accepted Answer

A) one molecule. 
B) two molecules. 
C) three molecules. 
D) six molecules. 
E) eight molecules. 
A) one molecule. 
B) two molecules. 
C) three molecules. 
D) six molecules. 
E) eight molecules.

Question 7

Which of the following is an example of an electron-carrier molecule?

Accepted Answer

A) citric acid 
B) CO2 
C) acetyl CoA 
D) NADH 
E) ATP 
A) citric acid 
B) CO2 
C) acetyl CoA 
D) NADH 
E) ATP

Question 8

The electron transport chain receives electrons directly from:

Accepted Answer

A) NADH only. 
B) FADH2 only. 
C) ATP only. 
D) NADH and FADH2. 
E) NADH and ATP. 
A) NADH only. 
B) FADH2 only. 
C) ATP only. 
D) NADH and FADH2. 
E) NADH and ATP.

Question 9

Why is it important that NAD+ molecules are regenerated during fermentation?

Accepted Answer

Glycolysis would stop when all

Question 10

________ is the first stage in glucose metabolism and does not require oxygen.

Accepted Answer

The answer of ________ is the first stage in glucose...

Question 11

Which of the following processes requires oxygen?

Accepted Answer

A) glycolysis 
B) the Krebs cycle 
C) the electron transport chain 
D) fermentation 
A) glycolysis 
B) the Krebs cycle 
C) the electron transport chain 
D) fermentation

Question 12

Some people trying to lose weight have gone on the "Atkins diet," in which they eat mostly high-protein, low-carbohydrate foods such as meat, cheese, and eggs. The amino acids in these protein-rich diets, such as alanine, glycine, and serine, can be converted to pyruvate by deamination (removal of the amino group). Based on this scenario as well as your knowledge of cellular respiration, how many ATP, NADH, and FADH2 molecules will be generated from one molecule of alanine during the mitochondrial matrix reactions?

Accepted Answer

A) one FADH2, four NADH, and one ATP 
B) two FADH2, six NADH, and two ATP 
C) no FADH2, one NADH, and two ATP 
D) two FADH2, three NADH, and two ATP 
E) one FADH2, one NADH, and one ATP 
A) one FADH2, four NADH, and one ATP 
B) two FADH2, six NADH, and two ATP 
C) no FADH2, one NADH, and two ATP 
D) two FADH2, three NADH, and two ATP 
E) one FADH2, one NADH, and one ATP

Question 13

Which of the following processes occurs in the cytoplasm?

Accepted Answer

A) glycolysis 
B) the Krebs cycle 
C) the electron transport chain 
A) glycolysis 
B) the Krebs cycle 
C) the electron transport chain

Question 14

In the mitochondrial matrix, oxygen combines with ________ to form ________.

Accepted Answer

A) electrons only; water 
B) hydrogen ions only; water 
C) electrons and hydrogen ions; water 
D) carbon only; CO2 
E) electrons and carbon; CO2 
A) electrons only; water 
B) hydrogen ions only; water 
C) electrons and hydrogen ions; water 
D) carbon only; CO2 
E) electrons and carbon; CO2

Question 15

The inner membrane of the mitochondria can be compared functionally to the thylakoid membranes of the chloroplast because both contain a system for:

Accepted Answer

A) enzyme synthesis. 
B) pyruvate production. 
C) glucose synthesis. 
D) anaerobic respiration. 
E) electron transport. 
A) enzyme synthesis. 
B) pyruvate production. 
C) glucose synthesis. 
D) anaerobic respiration. 
E) electron transport.

Question 16

As a bicyclist pedals up a hill to the finish line of a race and "feels the burn" in his leg muscles, those muscle cells are most likely utilizing:

Accepted Answer

A) only cellular respiration for maximum ATP production. 
B) only oxygen for maximum ATP production. 
C) some lactate fermentation. 
D) both cellular respiration and oxygen for maximum ATP production. 
A) only cellular respiration for maximum ATP production. 
B) only oxygen for maximum ATP production. 
C) some lactate fermentation. 
D) both cellular respiration and oxygen for maximum ATP production.

Question 17

When oxygen is present:

Accepted Answer

A) most animal cells utilize aerobic cellular respiration. 
B) most animal cells carry on fermentation and produce lactate. 
C) most bacteria and yeasts carry on fermentation. 
D) two ATP molecules are produced for each glucose molecule. 
E) most animals convert CO2 to glucose. 
A) most animal cells utilize aerobic cellular respiration. 
B) most animal cells carry on fermentation and produce lactate. 
C) most bacteria and yeasts carry on fermentation. 
D) two ATP molecules are produced for each glucose molecule. 
E) most animals convert CO2 to glucose.

Question 18

In vertebrate animal cells, where does the synthesis of lactate occur?

Accepted Answer

A) fluid portion of the cytoplasm 
B) surface of ribosomes 
C) mitochondrial matrix 
D) mitochondrial inner membranes 
E) nucleus 
A) fluid portion of the cytoplasm 
B) surface of ribosomes 
C) mitochondrial matrix 
D) mitochondrial inner membranes 
E) nucleus

Question 19

If no oxygen is available to a cell, then the net ATP production resulting from the metabolism of a single glucose molecule is:

Accepted Answer

A) no ATP. 
B) one ATP molecule. 
C) two ATP molecules. 
D) 34 or 36 ATP molecules. 
E) 34 or 38 ATP molecules. 
A) no ATP. 
B) one ATP molecule. 
C) two ATP molecules. 
D) 34 or 36 ATP molecules. 
E) 34 or 38 ATP molecules.

Question 20

Chemiosmosis in mitochondria directly results in the synthesis of:

Accepted Answer

A) NADH. 
B) FADH2. 
C) H2O. 
D) acetyl CoA. 
E) ATP. 
A) NADH. 
B) FADH2. 
C) H2O. 
D) acetyl CoA. 
E) ATP.

Exam 8: Harvesting Energy: Glycolysis and Cellular Respiration

The end product of glycolysis is:

The products of the Krebs cycle include:

All of the following are true statements about ATP EXCEPT that it is:

During glycolysis, two ATP molecules are "spent" in order to convert glucose to the highly reactive molecule:

Which kind of metabolic poison would interfere with glycolysis?

During the fermentation of one molecule of glucose, the net production of ATP is:

Which of the following is an example of an electron-carrier molecule?

The electron transport chain receives electrons directly from:

Why is it important that NAD+ molecules are regenerated during fermentation?

________ is the first stage in glucose metabolism and does not require oxygen.

Which of the following processes requires oxygen?

Which of the following processes occurs in the cytoplasm?

In the mitochondrial matrix, oxygen combines with ________ to form ________.

The inner membrane of the mitochondria can be compared functionally to the thylakoid membranes of the chloroplast because both contain a system for:

As a bicyclist pedals up a hill to the finish line of a race and "feels the burn" in his leg muscles, those muscle cells are most likely utilizing:

When oxygen is present:

In vertebrate animal cells, where does the synthesis of lactate occur?

If no oxygen is available to a cell, then the net ATP production resulting from the metabolism of a single glucose molecule is:

Chemiosmosis in mitochondria directly results in the synthesis of:

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

The Continuity of Life: Cellular Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

How Do Ecosystems Work

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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