Metabolism, Nutrition, And Energetics

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Question 1

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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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glycolysis.

oxidative phosphorylation.

catabolism.

anabolism.

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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cytoplasm

the plasma membrane

the mitochondria

the endoplasmic reticulum

nucleus

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Question 3

Free

Multiple Choice

The first steps of catabolism generally take place in the

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mitochondria.

plasma membrane.

nucleus.

endoplasmic reticulum.

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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energetics.

glycolysis.

cellular respiration.

thermodynamics.

metabolism.

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Question 5

Free

Multiple Choice

What is the role of NADH in metabolism?

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convert pyruvic acid into acetyl-coA

produce bicarbonate ions for a pH buffer

transport hydrogen atoms to coenzymes

produce carbon dioxide

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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phosphorylated; deaminated

reduced; oxidized

made; recycled

phosphorylated; dephosphorylated

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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nutrient storehouse.

nutrient reserve.

nutrient pool.

energy reserve.

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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nutrients.

organics.

ketones.

metabolites.

coenzymes.

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Question 9

Multiple Choice

The function of the citric acid cycle is to

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remove hydrogen atoms from organic molecules and transfer them to coenzymes.

transfer the acetyl group gained from glycolysis to molecules of pyruvate.

hydrolyze glucose in the presence of oxygen to obtain two pyruvate molecules.

produce carbon dioxide to balance the oxygen requirement for cellular respiration.

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 hydrogen ion

a coenzyme

the acetyl group

ADP

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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glucose

acetyl-CoA

ATP

NAD

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.

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inner membrane

plasma membrane

outer membrane

matrix

cristae

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Question 13

Multiple Choice

All of the following occur during glycolysis, except

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a molecule of glucose is converted into two molecules of pyruvic acid.

four molecules of ATP are produced.

two molecules of ATP are consumed.

hydrogen atoms are removed from organic molecules.

a molecule of carbon dioxide is produced.

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Question 14

Multiple Choice

The citric acid cycle

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begins with the formation of a molecule of citric acid.

directly produces most of the ATP from the catabolism of glucose.

consumes two moles of carbon dioxide.

contains enzymes called cytochromes.

forms acetyl-CoA from glucose-6-phosphate.

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Question 15

Multiple Choice

The carbon dioxide of respiration is formed during

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glycolysis.

the citric acid cycle.

electron transport.

the formation of pyruvic acid.

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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Question 17

Multiple Choice

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

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carbohydrate craving.

the Atkins diet.

carbohydrate loading.

glycolysis reaction.

overeating.

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Question 18

Multiple Choice

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

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glycogen

glucose

protein

fat

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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removal of hydrogen atoms from a substrate molecule by coenzymes.

ionization of hydrogen atoms.

decreasing the energy level of electrons passing through the electron transport chain.

the breaking of carbon-carbon covalent bonds.

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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splitting of oxygen molecules.

breaking of the covalent bonds in glucose.

movement of hydrogen ions through channels in the inner mitochondrial membrane.

combination of two atoms of hydrogen and one atom of oxygen to form water.

oxidation of acetyl-CoA.

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Metabolism, Nutrition, And Energetics

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

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

The first steps of catabolism generally take place in the

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

What is the role of NADH in metabolism?

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

All the available nutrient molecules distributed in the blood form a

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

The function of the citric acid cycle is to

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

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

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

All of the following occur during glycolysis, except

The citric acid cycle

The carbon dioxide of respiration is formed during

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

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

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

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

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

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