Question 1

The breakdown of glycogen into glucose is called gluconeogenesis.

Accepted Answer

A) True 
 B)False

Question 2

Elevated blood levels of lactate dehydrogenase may assist in the diagnosis of which medical condition?

Accepted Answer

A)  Paget's disease
B)  pancreatitis
C)  muscular dystrophy
D)  myocardial infarction

Question 3

The activity of creatine kinase is increased by a rise in ____ levels in the muscle fiber.

Accepted Answer

A)  NAD.
B)  ATP.
C)  ADP.
D)  lactate.

Question 4

The simplest and most rapid method of producing ATP during exercise is through

Accepted Answer

A)  glycolysis.
B)  ATP-CP system.
C)  aerobic metabolism.
D)  glycogenolysis.

Question 5

The term lactate refers to

Accepted Answer

A)  a potential end-product of glycolysis.
B)  the conjugate base of lactic acid.
C)  the salt of lactic acid.
D)  all of the above answers are correct.

Question 6

By definition,an endergonic reaction is

Accepted Answer

A)  a chemical reaction that requires energy to be added to the reactants before the reaction will take place.
B)  a chemical reaction that gives off energy.
C)  an enzyme-catalyzed reaction.
D)  a chemical reaction that results in products that are identical in structure.

Question 7

The calculated efficiency for aerobic respiration is approximately

Accepted Answer

A)  0%.
B)  34%.
C)  100%.
D)  66%.

Question 8

The total ATP tally from the aerobic breakdown of glucose is

Accepted Answer

A)  32 ATP.
B)  36 ATP.
C)  38 ATP.
D)  39 ATP.

Question 9

Free radicals are molecules that contain an unpaired electron in their outer orbital.

Accepted Answer

A) True 
 B)False

Question 10

Aerobic production of ATP occurs in the

Accepted Answer

A)  mitochondria in a process called glycolysis.
B)  mitochondria in a process called oxidative phosphorylation.
C)  mitochondria in a process called beta oxidation.
D)  cytoplasm.

Question 11

Compounds that contain carbon are called inorganic compounds.
38.The field of molecular biology is concerned with understanding the regulation of proteins.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following statements about glycolysis is correct?

Accepted Answer

A)  glycolysis occurs in the mitochondrial matrix.
B)  glycolysis involves the breakdown of glucose or glycogen into two molecules of pyruvate or lactate
C)  glycolysis can start with the breakdown of fatty acids.
D)  glycolysis does NOT produce any ATP.

Question 13

The two most important hydrogen (electron) carriers in bioenergetic chemical reactions are

Accepted Answer

A)  NAD and ATP.
B)  FAD and ATP.
C)  NAD and FAD.
D)  NAD and LDH.

Question 14

The actual net ATP yield from aerobic metabolism of one molecule of glucose is different from the theoretical yield because

Accepted Answer

A)  the net production of ATP is higher than previously thought.
B)  it accounts for the fact that the energy provided by NADH and FADH is required not only for ATP production but also to transport ATP across the mitochondrial membrane.
C)  it eliminates the ATP derived from NADH.
D)  All of these answers are correct.

Question 15

The rate limiting enzyme in the Krebs cycle is

Accepted Answer

A)  isocitrate dehydrogenase.
B)  hexokinase.
C)  succinate dehydrogenase.
D)  cytochrome oxidase.

Question 16

Coupled reactions are defined as

Accepted Answer

A)  reactions that are linked together via the same enzyme.
B)  reactions that are linked together,with the liberation of free energy in one reaction being used to drive the second reaction.
C)  reactions that are not directly linked together but are require the same enzyme.
D)  reactions that are linked together because they act upon common substrates.

Question 17

Each pair of electrons passed through the electron transport chain from NADH to oxygen releases enough energy to form

Accepted Answer

A)  1.5 ATP.
B)  2.5 ATP.
C)  5.0 ATP.
D)  10.0 ATP.

Question 18

The primary purpose of the Krebs cycle is to

Accepted Answer

A)  complete the oxidation of foodstuffs using NAD and FAD as hydrogen (electron) carriers.
B)  catalyze the phosphorylation of ADP from creatine phosphate.
C)  oxidize foodstuffs and transfer those electrons to pyruvic acid.
D)  convert lactate to pyruvate.

Question 19

The rate-limiting enzyme in the electron transport chain is

Accepted Answer

A)  phosphofructokinase.
B)  isocitrate dehydrogenase.
C)  myosin ATPase.
D)  cytochrome oxidase.

Question 20

Stored polysaccharides in muscle and other tissues in animals are called

Accepted Answer

A)  glucose.
B)  fructose.
C)  glycogen.
D)  cellulose.

Exam 4: Bioenergetics

The rate limiting enzyme in the Krebs cycle is

Correct AnswerverifiedShow Answer

The breakdown of glycogen into glucose is called gluconeogenesis.

Correct AnswerverifiedShow Answer

Free radicals are molecules that contain an unpaired electron in their outer orbital.

Correct AnswerverifiedShow Answer

The actual net ATP yield from aerobic metabolism of one molecule of glucose is different from the theoretical yield because

Correct AnswerverifiedShow Answer

Each pair of electrons passed through the electron transport chain from NADH to oxygen releases enough energy to form

Correct AnswerverifiedShow Answer

The total ATP tally from the aerobic breakdown of glucose is

Correct AnswerverifiedShow Answer

The rate-limiting enzyme in the electron transport chain is

Correct AnswerverifiedShow Answer

The primary purpose of the Krebs cycle is to

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By definition,an endergonic reaction is

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Aerobic production of ATP occurs in the

Correct AnswerverifiedShow Answer

The calculated efficiency for aerobic respiration is approximately

Correct AnswerverifiedShow Answer

Elevated blood levels of lactate dehydrogenase may assist in the diagnosis of which medical condition?

Correct AnswerverifiedShow Answer

The activity of creatine kinase is increased by a rise in ____ levels in the muscle fiber.

Correct AnswerverifiedShow Answer

Which of the following statements about glycolysis is correct?

Correct AnswerverifiedShow Answer

The two most important hydrogen (electron) carriers in bioenergetic chemical reactions are

Correct AnswerverifiedShow Answer

Compounds that contain carbon are called inorganic compounds. 38.The field of molecular biology is concerned with understanding the regulation of proteins.

Correct AnswerverifiedShow Answer

Coupled reactions are defined as

Correct AnswerverifiedShow Answer

Stored polysaccharides in muscle and other tissues in animals are called

Correct AnswerverifiedShow Answer

The simplest and most rapid method of producing ATP during exercise is through

Correct AnswerverifiedShow Answer

The term lactate refers to

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