Question 1

Which of the following statements is true concerning the electron transport chain?

Accepted Answer

A) The primary purpose of the electron transport chain is to complete the oxidation of carbohydrates. 
B) The primary purpose of the electron transport chain is to produce acetyl-CoA. 
C) The primary purpose of the electron transport chain is to harvest the energy from electrons moving down this pathway to produce ATP and water. 
D) The end-result of the electron transport chain is the formation of lactate. 
A) The primary purpose of the electron transport chain is to complete the oxidation of carbohydrates. 
B) The primary purpose of the electron transport chain is to produce acetyl-CoA. 
C) The primary purpose of the electron transport chain is to harvest the energy from electrons moving down this pathway to produce ATP and water. 
D) The end-result of the electron transport chain is the formation of lactate. C

Question 2

In general,the higher the intensity of the activity,the greater the contribution of

Accepted Answer

A) aerobic energy production. 
B) anaerobic energy production. 
C) the Krebs cycle to the production of ATP by substrate level phosphorylation. 
D) None of the above answers are correct. 
A) aerobic energy production. 
B) anaerobic energy production. 
C) the Krebs cycle to the production of ATP by substrate level phosphorylation. 
D) None of the above answers are correct. B

Question 3

The rate limiting enzyme in glycolysis is

Accepted Answer

A) lactate dehydrogenase. 
B) hexokinase. 
C) phosphofructokinase. 
D) pyruvate kinase. 
A) lactate dehydrogenase. 
B) hexokinase. 
C) phosphofructokinase. 
D) pyruvate kinase. C

Question 4

Body temperature increases slightly during exercise.A 1-2O C increase in muscle temperature during exercise would likely

Accepted Answer

A) increase enzyme activity. 
B) decrease enzyme activity. 
C) denatures enzymes. 
D) none of these answers are correct. 
A) increase enzyme activity. 
B) decrease enzyme activity. 
C) denatures enzymes. 
D) none of these answers are correct.

Question 5

Fats that are stored in muscle and adipose tissue and play an important role as an energy substrate are

Accepted Answer

A) phospholipids. 
B) cholesterol. 
C) triglycerides. 
D) lipoproteins. 
A) phospholipids. 
B) cholesterol. 
C) triglycerides. 
D) lipoproteins.

Question 6

The caloric (kcal)yield of one gram of protein is approximately

Accepted Answer

A) 4 kcal/g. 
B) 7 kcal/g. 
C) 9 kcal/g. 
D) the same as that of one gram of fat. 
A) 4 kcal/g. 
B) 7 kcal/g. 
C) 9 kcal/g. 
D) the same as that of one gram of fat.

Question 7

A high level of ________ in the muscle fiber would slow glycolysis by inhibiting its rate limiting enzyme.

Accepted Answer

A) ADP 
B) ATP 
C) Pi 
D) none of the above answers are correct. 
A) ADP 
B) ATP 
C) Pi 
D) none of the above answers are correct.

Question 8

The process of beta-oxidation involves

Accepted Answer

A) breaking down stored triglycerides to FFA. 
B) the addition of oxygen to a fatty acid. 
C) the breakdown of a fatty acid to acetyl-CoA. 
D) none of these. 
A) breaking down stored triglycerides to FFA. 
B) the addition of oxygen to a fatty acid. 
C) the breakdown of a fatty acid to acetyl-CoA. 
D) none of these.

Question 9

Rate limiting enzymes are often located

Accepted Answer

A) near the beginning of a metabolic pathway. 
B) near the end of a metabolic pathway. 
C) outside of the main metabolic pathway. 
D) None of the above answers are correct. 
A) near the beginning of a metabolic pathway. 
B) near the end of a metabolic pathway. 
C) outside of the main metabolic pathway. 
D) None of the above answers are correct.

Question 10

The metabolic process of converting foodstuffs into a biological usable form of energy is called

Accepted Answer

A) bioenergetics 
B) metabolism 
C) glycolysis 
D) coupled reactions 
A) bioenergetics 
B) metabolism 
C) glycolysis 
D) coupled reactions

Question 11

The conversion of pyruvate to lactate requires

Accepted Answer

A) the enzyme lactate dehydrogenase. 
B) NADH + H+. 
C) A and B are correct. 
D) None of the above answers are correct. 
A) the enzyme lactate dehydrogenase. 
B) NADH + H+. 
C) A and B are correct. 
D) None of the above answers are correct.

Question 12

Cellular reactions that give off energy are called exergonic reactions.

Accepted Answer

A) True 
 B)False

Question 13

The immediate source of energy for muscular contraction is

Accepted Answer

A) NAD. 
B) FAD. 
C) ATP. 
D) GTP. 
A) NAD. 
B) FAD. 
C) ATP. 
D) GTP.

Question 14

If muscle glycogen is the initial substrate,the net production ATP resulting during glycolysis is.

Accepted Answer

A) 2 molecules. 
B) 3 molecules. 
C) 32 molecules. 
D) 33 molecules. 
A) 2 molecules. 
B) 3 molecules. 
C) 32 molecules. 
D) 33 molecules.

Question 15

The primary function of the Krebs cycle is to

Accepted Answer

A) complete the oxidation of carbohydrates,fats,and proteins (i.e. ,form NADH and FADH). 
B) produce ATP via substrate-level phosphorylation. 
C) prime glycolysis for the production of ATP. 
D) produce H2O and ATP. 
A) complete the oxidation of carbohydrates,fats,and proteins (i.e. ,form NADH and FADH). 
B) produce ATP via substrate-level phosphorylation. 
C) prime glycolysis for the production of ATP. 
D) produce H2O and ATP.

Question 16

Enzymes called kinases are responsible for

Accepted Answer

A) removing electrons from substrates 
B) adding hydrogens to substrates 
C) adding phosphate groups (i.e. ,phosphorylation of substrates) 
D) enzymes that catalyze the transfer of protons from one molecule to another 
A) removing electrons from substrates 
B) adding hydrogens to substrates 
C) adding phosphate groups (i.e. ,phosphorylation of substrates) 
D) enzymes that catalyze the transfer of protons from one molecule to another

Question 17

Compared to NADH,FADH produces less ATP because

Accepted Answer

A) FADH has a lower molecular mass than NADH 
B) FADH enters the electron transport chain before NADH 
C) the electrons from FADH are donated later in the electron transport chain than those by NADH 
D) None of the above answers are correct 
A) FADH has a lower molecular mass than NADH 
B) FADH enters the electron transport chain before NADH 
C) the electrons from FADH are donated later in the electron transport chain than those by NADH 
D) None of the above answers are correct

Question 18

Enzymes are catalysts that increase the rate of reactions by

Accepted Answer

A) pulling two substrates together. 
B) lowering the energy of activation. 
C) binding to a substrate and producing energy. 
D) binding to a substrate and releasing protons. 
A) pulling two substrates together. 
B) lowering the energy of activation. 
C) binding to a substrate and producing energy. 
D) binding to a substrate and releasing protons.

Question 19

In order to be oxidized for the eventual formation of ATP,amino acids must first be converted to Acetyl-CoA or Krebs cycle intermediates.

Accepted Answer

A) True 
 B)False

Question 20

Three molecules of NADH are produced during one turn of the citric acid cycle.How many total ATP molecules can be produced from these three NADH molecules?

Accepted Answer

A) 1.5 ATP 
B) 2.5 ATP 
C) 5.0 ATP 
D) 7.5 ATP 
A) 1.5 ATP 
B) 2.5 ATP 
C) 5.0 ATP 
D) 7.5 ATP

Exam 4: Bioenergetics

Which of the following statements is true concerning the electron transport chain?

In general,the higher the intensity of the activity,the greater the contribution of

The rate limiting enzyme in glycolysis is

Body temperature increases slightly during exercise.A 1-2O C increase in muscle temperature during exercise would likely

Fats that are stored in muscle and adipose tissue and play an important role as an energy substrate are

The caloric (kcal)yield of one gram of protein is approximately

A high level of ________ in the muscle fiber would slow glycolysis by inhibiting its rate limiting enzyme.

The process of beta-oxidation involves

Rate limiting enzymes are often located

The metabolic process of converting foodstuffs into a biological usable form of energy is called

The conversion of pyruvate to lactate requires

Cellular reactions that give off energy are called exergonic reactions.

The immediate source of energy for muscular contraction is

If muscle glycogen is the initial substrate,the net production ATP resulting during glycolysis is.

The primary function of the Krebs cycle is to

Enzymes called kinases are responsible for

Compared to NADH,FADH produces less ATP because

Enzymes are catalysts that increase the rate of reactions by

In order to be oxidized for the eventual formation of ATP,amino acids must first be converted to Acetyl-CoA or Krebs cycle intermediates.

Three molecules of NADH are produced during one turn of the citric acid cycle.How many total ATP molecules can be produced from these three NADH molecules?

Introduction to Exercise Physiology

A: Common Measurements in Exercise Physiology

B: Common Measurements in Exercise Physiology

Control of the Internal Environment

Exercise Metabolism

Cell Signaling and Hormonal Response to Exercise

Exercise and the Immune System

The Nervous System: Structure and Control of Movement

Skeletal Muscle: Structure and Function

Circulatory Responses to Exercise

Respiration During Exercise

Acid-Base Balance

Temperature Regulation

Physiology of Training: Effect on Vo2 Max, Performance, and Strength

Preventing Chronic Disease: Physical Activity and Healthy Eating

Work Tests to Evaluate Cardiorespiratory Fitness

Exercise Prescriptions for Health and Fitness

Exercise Prescriptions for Health and Fitness

Nutrition and Body Composition for Health

Factors Affecting Performance

Laboratory Assessment of Human Performance

Training for Performance

Training for the Female Athlete, Children, Special Populations, and the Masters Athlete

Nutrition, Body Composition, and Performance

Exercise and the Environment

Ergogenic Aids

Filters

Body temperature increases slightly during exercise.A 1-2^O C increase in muscle temperature during exercise would likely