Question 1

The formation of acetyl coenzyme A is an example of a(an) ________ reaction.

Accepted Answer

A)  esterification
B)  redox
C)  addition
D)  acid/base
E)  eliminationF) B) and D)
G) A) and D)

Question 2

Match the following.
-catabolism

Accepted Answer

A)  the molecule produced from digestion products in the second stage of catabolism
B)  metabolic processes that consume energy in order to build molecules
C)  the stage of catabolism in which acetyl-CoA is oxidized to produce ATP,reduced coenzymes,and CO2
D)  metabolic processes that break down large molecules,thereby releasing energy
E)  the universal energy currency of the cell;a molecule used to transfer energyF) a molecule that can be phosphorylated as a means of temporarily storing energyG) the stage of catabolism in which complex food molecules are broken down into simpler substances for transport and/or further reactionH) the stage of catabolism in which the energy stored in reduced coenzymes is converted to ATPI) D) and E)
J) E) and G)

Question 3

Which reaction of the citric acid cycle generates the high energy molecule GTP?

Accepted Answer

A)  citrate to isocitrate
B)  isocitrate to α-ketoglutarate
C)  α-ketoglutarate to succinyl CoA
D)  succinyl CoA to succinate
E)  succinate to fumarateF) D) and E)
G) C) and D)

Question 4

All of the following are specific requirements for energy in biochemical processes except

Accepted Answer

A)  stored energy must be in a form that is chemically accessible.
B)  release of energy from storage must occur at a carefully controlled rate.
C)  release of energy from food must occur gradually.
D)  energy needed for unfavorable reactions must be available in the form of heat.
E)  the correct amount of heat must be released from biochemical reactions to maintain body temperature.F) A) and B)
G) A) and E)

Question 5

Which statement concerning coenzymes and redox reactions is incorrect?

Accepted Answer

A)  Oxidation can be considered as loss of hydrogen or gain of oxygen.
B)  Reduction can be considered as gain of hydrogen or loss of oxygen.
C)  NAD+ is the oxidized form of NADH.
D)  An oxidation reaction cannot occur unless a reduction reaction also occurs.
E)  FAD is the reduced form of FADH2.F) A) and B)
G) B) and E)

Question 6

All of the following chemicals are involved in the citric acid cycle except

Accepted Answer

A)  acetyl-CoA.
B)  isocitrate.
C)  succinate.
D)  malate.
E)  ascorbate.F) A) and C)
G) A) and B)

Question 7

How many ATP molecules are formed for each FADH2 molecule brought into complex II?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) A) and B)
G) B) and E)

Question 8

The hydrolysis of ATP to ADP ________ 7 kcal/mol of energy and is an ________ reaction.

Accepted Answer

A)  releases;endergonic
B)  consumes;exergonic
C)  releases;exergonic
D)  consumes;endergonic
E)  None of these are correct.F) B) and E)
G) D) and E)

Question 9

The purpose of coupling two biochemical reactions is to

Accepted Answer

A)  lower the activation energies of both reactions.
B)  convert an endergonic reaction to an exergonic one.
C)  convert an exergonic reaction to an endergonic one.
D)  use an endergonic reaction to drive an exergonic reaction.
E)  use an exergonic reaction to drive an endergonic reaction.F) A) and D)
G) A) and C)

Question 10

The abbreviation ATP stands for

Accepted Answer

A)  adenine + three phosphates.
B)  adenosine triphosphate.
C)  adenosine tetraphosphate.
D)  anabolic triple phosphate.
E)  alanine triphosphate.F) A) and E)
G) All of the above

Question 11

Which of the following reactions of the citric acid cycle is a decarboxylation occurring?

Accepted Answer

A)  conversion of succinyl CoA to sucicinyl
B)  conversion of isocitrate to α-ketoglutarate
C)  α-ketoglutarate to succinyl CoA
D)  All three reactions are decarboxylations.
E)  only B and CF) A) and D)
G) B) and C)

Question 12

Metabolism is composed of which process(es) ?

Accepted Answer

A)  anabolism
B)  catabolism
C)  oncologism
D)  both A and B
E)  both B and CF) All of the above
G) A) and C)

Question 13

In the first step of the citric acid cycle,acetyl-CoA reacts with ________ to produce ________,which is isomerized to ________ in the second step.

Accepted Answer

A)  succinate;fumarate;malate
B)  succinate;malate;fumarate
C)  oxaloacetate;isocitrate;citrate
D)  oxaloacetate;citrate;isocitrate
E)  aconitase;isocitrate;citrateF) None of the above
G) All of the above

Question 14

Match the following.
-citric acid cycle

Accepted Answer

A)  the molecule produced from digestion products in the second stage of catabolism
B)  metabolic processes that consume energy in order to build molecules
C)  the stage of catabolism in which acetyl-CoA is oxidized to produce ATP,reduced coenzymes,and CO2
D)  metabolic processes that break down large molecules,thereby releasing energy
E)  the universal energy currency of the cell;a molecule used to transfer energyF) a molecule that can be phosphorylated as a means of temporarily storing energyG) the stage of catabolism in which complex food molecules are broken down into simpler substances for transport and/or further reactionH) the stage of catabolism in which the energy stored in reduced coenzymes is converted to ATPI) A) and H)
J) C) and F)

Question 15

Which of the following organelles is involved in protein synthesis and transport?

Accepted Answer

A)  Golgi apparatus
B)  lysosome
C)  rough endoplasmic reticulum
D)  mitochondria
E)  smooth endoplasmic reticulumF) A) and B)
G) C) and E)

Question 16

Which of the following cofactors is used in fatty acid synthesis?

Accepted Answer

A)  NADH
B)  FAD
C)  NADPH
D)  FADH2
E)  NAD+F) B) and E)
G) A) and E)

Question 17

Harmful byproducts of biochemical oxidation include

Accepted Answer

A)  superoxide dismutase and catalase.
B)  vitamins A,C,and E.
C)  superoxide ions and hydroxyl free radicals.
D)  ATP.
E)  coenzyme Q.F) C) and D)
G) None of the above

Question 18

The metal that acts as an electron carrier in the cytochromes in the electron transport chain is

Accepted Answer

A)  magnesium.
B)  chromium.
C)  iron.
D)  cobalt.
E)  hydrogen.F) All of the above
G) C) and D)

Question 19

In addition to producing ATP,the citric acid cycle produces ________ as high energy molecules and ________ as its major chemical waste product.

Accepted Answer

A)  oxidized coenzymes;H2O
B)  oxidized coenzymes;CO2
C)  reduced coenzymes;H2O
D)  reduced coenzymes;CO2
E)  ADP;O2F) A) and D)
G) D) and E)

Question 20

The process of converting ADP to ATP in the mitochondrion takes place by a process known as

Accepted Answer

A)  oxidative phosphorylation.
B)  chemiosmosis.
C)  respiration.
D)  reductive phosphorylation.
E)  chemiosmotic phosphorylation.F) None of the above
G) A) and B)

Exam 21: The Generation of Biochemical Energy

Metabolism is composed of which process(es) ?

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All of the following are specific requirements for energy in biochemical processes except

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In addition to producing ATP,the citric acid cycle produces ________ as high energy molecules and ________ as its major chemical waste product.

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Which of the following organelles is involved in protein synthesis and transport?

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The purpose of coupling two biochemical reactions is to

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Which of the following cofactors is used in fatty acid synthesis?

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The process of converting ADP to ATP in the mitochondrion takes place by a process known as

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Which of the following reactions of the citric acid cycle is a decarboxylation occurring?

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The formation of acetyl coenzyme A is an example of a(an) ________ reaction.

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The hydrolysis of ATP to ADP ________ 7 kcal/mol of energy and is an ________ reaction.

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How many ATP molecules are formed for each FADH2 molecule brought into complex II?

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Match the following. -citric acid cycle

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The metal that acts as an electron carrier in the cytochromes in the electron transport chain is

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Which reaction of the citric acid cycle generates the high energy molecule GTP?

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All of the following chemicals are involved in the citric acid cycle except

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The abbreviation ATP stands for

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Match the following. -catabolism

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Which statement concerning coenzymes and redox reactions is incorrect?

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Harmful byproducts of biochemical oxidation include

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In the first step of the citric acid cycle,acetyl-CoA reacts with ________ to produce ________,which is isomerized to ________ in the second step.

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In addition to producing ATP,the citric acid cycle produces as high energy molecules and as its major chemical waste product.

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The hydrolysis of ATP to ADP 7 kcal/mol of energy and is an reaction.

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How many ATP molecules are formed for each FADH₂ molecule brought into complex II?

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In the first step of the citric acid cycle,acetyl-CoA reacts with to produce ,which is isomerized to in the second step.

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