Metabolism, Nutrition, And Energetics

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Question 1
Free
Multiple Choice

The sum of all of the biochemical processes going on within the human body at any given time is called

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A

glycolysis.

B

oxidative phosphorylation.

C

catabolism.

D

anabolism.

E

metabolism.

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Question 2
Free
Multiple Choice

Reactions within ________ provide most of the energy needed by a typical cell.

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A

cytoplasm

B

the plasma membrane

C

the mitochondria

D

the endoplasmic reticulum

E

nucleus

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Question 3
Free
Multiple Choice

The first steps of catabolism generally take place in the

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A

mitochondria.

B

plasma membrane.

C

nucleus.

D

endoplasmic reticulum.

E

cytosol.

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Question 4
Free
Multiple Choice

The study of the flow of energy and its transformations is called

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A

energetics.

B

glycolysis.

C

cellular respiration.

D

thermodynamics.

E

metabolism.

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Question 5
Free
Multiple Choice

What is the role of NADH in metabolism?

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A

convert pyruvic acid into acetyl-coA

B

produce bicarbonate ions for a pH buffer

C

transport hydrogen atoms to coenzymes

D

produce carbon dioxide

E

phosphorylate ADP into ATP

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Question 6
Multiple Choice

When NAD+ is ________ it becomes NADH. When NADH is ________ it becomes NAD+.

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A
phosphorylated; deaminated
B
reduced; oxidized
C
made; recycled
D
phosphorylated; dephosphorylated
E
oxidized; reduced
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Question 7
Multiple Choice

All the available nutrient molecules distributed in the blood form a

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A
nutrient storehouse.
B
nutrient reserve.
C
nutrient pool.
D
energy reserve.
E
organic storehouse.
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Question 8
Multiple Choice

Intermediary molecules that accept electrons and transfer them to another molecule are called

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A
nutrients.
B
organics.
C
ketones.
D
metabolites.
E
coenzymes.
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Question 9
Multiple Choice

The function of the citric acid cycle is to

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A
remove hydrogen atoms from organic molecules and transfer them to coenzymes.
B
transfer the acetyl group gained from glycolysis to molecules of pyruvate.
C
hydrolyze glucose in the presence of oxygen to obtain two pyruvate molecules.
D
produce carbon dioxide to balance the oxygen requirement for cellular respiration.
E
produce water.
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Question 10
Multiple Choice

In the ETS, ________ accepts electrons from one molecule and transfers them to another.

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A
a hydrogen ion
B
a coenzyme
C
the acetyl group
D
ADP
E
NAD
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Question 11
Multiple Choice

In order for glycolysis to proceed, which of the following need not be present?

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A
glucose
B
acetyl-CoA
C
ATP
D
NAD
E
ADP
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Question 12
Multiple Choice

The ________ of the mitochondrion contains large-diameter pores that are permeable to ions and small organic molecules such as pyruvic acid.

Choose correct answer/s
A
inner membrane
B
plasma membrane
C
outer membrane
D
matrix
E
cristae
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Question 13
Multiple Choice

All of the following occur during glycolysis, except

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A
a molecule of glucose is converted into two molecules of pyruvic acid.
B
four molecules of ATP are produced.
C
two molecules of ATP are consumed.
D
hydrogen atoms are removed from organic molecules.
E
a molecule of carbon dioxide is produced.
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Question 14
Multiple Choice

The citric acid cycle

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A
begins with the formation of a molecule of citric acid.
B
directly produces most of the ATP from the catabolism of glucose.
C
consumes two moles of carbon dioxide.
D
contains enzymes called cytochromes.
E
forms acetyl-CoA from glucose-6-phosphate.
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Question 15
Multiple Choice

The carbon dioxide of respiration is formed during

Choose correct answer/s
A
glycolysis.
B
the citric acid cycle.
C
electron transport.
D
the formation of pyruvic acid.
E
the formation of water.
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Question 16
Multiple Choice

In glycolysis, each molecule of glucose that is catabolized gives a net yield of how many molecules of ATP?

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A
2
B
4
C
30
D
36
E
38
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Question 17
Multiple Choice

The strategy of eating starchy foods for several days before an athletic event is known as

Choose correct answer/s
A
carbohydrate craving.
B
the Atkins diet.
C
carbohydrate loading.
D
glycolysis reaction.
E
overeating.
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Question 18
Multiple Choice

Although other nutrients can feed into the citric acid cycle, ________ yields energy the quickest.

Choose correct answer/s
A
glycogen
B
glucose
C
protein
D
fat
E
an amino acid
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Question 19
Multiple Choice

The major steps in oxidative phosphorylation include all of the following except

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A
removal of hydrogen atoms from a substrate molecule by coenzymes.
B
ionization of hydrogen atoms.
C
decreasing the energy level of electrons passing through the electron transport chain.
D
the breaking of carbon-carbon covalent bonds.
E
the acceptance of electrons by oxygen atoms.
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Question 20
Multiple Choice

In oxidative phosphorylation, energy for the synthesis of ATP is directly obtained from the

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A
splitting of oxygen molecules.
B
breaking of the covalent bonds in glucose.
C
movement of hydrogen ions through channels in the inner mitochondrial membrane.
D
combination of two atoms of hydrogen and one atom of oxygen to form water.
E
oxidation of acetyl-CoA.
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