Question 1

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

Accepted Answer

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.

Question 2

Cyanide gas is lethal because it

Accepted Answer

A)   inhibits the kinase that phosphorylates ATP.
B)   inhibits the ATP synthase.
C)   blocks substrate-level phosphorylation.
D)   blocks the final electron acceptor in the ETS.
E)   binds NAD preventing it from being reduced.

Question 3

What is the role of NADH in metabolism?

Accepted Answer

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

Question 4

The major anion in body fluids is

Accepted Answer

A)   chloride.
B)   bicarbonate.
C)   sulfate.
D)   iodide.
E)   phosphate.

Question 5

The citric acid cycle is an aerobic process because

Accepted Answer

A)   ADP is phosphorylated.
B)   FADH2 is produced.
C)   citric acid molecules have oxygen atoms.
D)   oxygen is needed to remove carbon atoms as carbon dioxide.
E)   NAH+ is converted into NADH.

Question 6

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

Accepted Answer

A)   nutrients.
B)   organics.
C)   ketones.
D)   metabolites.
E)   coenzymes.

Question 7

The citric acid cycle

Accepted Answer

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.

Question 8

________ carry excess cholesterol from peripheral tissues to the liver.

Accepted Answer

A)   Very-low-density lipoproteins (VLDLs) 
B)   Low-density lipoproteins (LDLs) 
C)   Micelles
D)   High-density lipoproteins (HDLs) 
E)   Very-high-density lipoproteins (VHDLs)

Question 9

When the body is relying on internal energy reserves to continue meeting its energy demands, it is in the ________ state.

Accepted Answer

A)   postabsorptive
B)   absorptive
C)   starvation
D)   deprivation
E)   preabsorptive

Question 10

Define gluconeogenesis. What organs can it occur in? What precursors can be used? What is the outcome?

Accepted Answer

Gluconeogenesis is the synthesis of gluc...

Question 11

Metabolism of amino acids in the citric acid cycle yields

Accepted Answer

A)   more energy than lipid metabolism.
B)   more energy than carbohydrate metabolism.
C)   approximately the same energy as lipid metabolism.
D)   approximately the same energy as carbohydrate metabolism.
E)   more energy than lipid and carbohydrate metabolism combined.

Question 12

The vitamin that is part of the coenzyme NAD is

Accepted Answer

A)   thiamine.
B)   riboflavin.
C)   niacin.
D)   folic acid (folate) .
E)   cobalamin.

Question 13

Lipids

Accepted Answer

A)   deliver somewhat less energy than an equivalent mass of glucose.
B)   are difficult to store since they are not water soluble.
C)   yield quick bursts of energy.
D)   provide energy for cells with modest energy demands.
E)   are the primary nutrient metabolized in cells.

Question 14

Fat-soluble vitamin overdoses primarily affect which organ?

Accepted Answer

A)   heart
B)   brain
C)   skeletal muscles
D)   liver
E)   lungs

Question 15

Catabolism of protein is not a practical source of quick energy because of all of the following except that

Accepted Answer

A)   proteins are more difficult to break apart than lipids or carbohydrates.
B)   the energy yield from protein is less than the yield from lipids.
C)   one of the by-products of protein catabolism is ammonia.
D)   most individuals have little protein to spare before harming vital organs.
E)   extensive catabolism of protein threatens homeostasis.

Question 16

A vitamin obtained that is a coenzyme in amino acid and lipid metabolism is

Accepted Answer

A)   pyridoxine (B6) .
B)   thiamine.
C)   riboflavin.
D)   folic acid (folate) .
E)   niacin.

Question 17

An ion that is a necessary component of high-energy compounds and nucleic acids and a structural componentof bone is the ________ ion.

Accepted Answer

A)   chloride
B)   sulfate
C)   phosphate
D)   bicarbonate
E)   iodide

Question 18

All of the following occur during glycolysis, except

Accepted Answer

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.

Question 19

The vitamin that prevents breakdown of vitamin A and fatty acids is vitamin

Accepted Answer

A)   A.
B)   B.
C)   C.
D)   D.
E)   E.

Question 20

The first steps of catabolism generally take place in the

Accepted Answer

A)   mitochondria.
B)   plasma membrane.
C)   nucleus.
D)   endoplasmic reticulum.
E)   cytosol.

Exam 25: Metabolism, Nutrition, and Energetics

The vitamin that is part of the coenzyme NAD is

Correct AnswerverifiedShow Answer

The vitamin that prevents breakdown of vitamin A and fatty acids is vitamin

Correct AnswerverifiedShow Answer

Cyanide gas is lethal because it

Correct AnswerverifiedShow Answer

What is the role of NADH in metabolism?

Correct AnswerverifiedShow Answer

Metabolism of amino acids in the citric acid cycle yields

Correct AnswerverifiedShow Answer

The citric acid cycle

Correct AnswerverifiedShow Answer

All of the following occur during glycolysis, except

Correct AnswerverifiedShow Answer

Catabolism of protein is not a practical source of quick energy because of all of the following except that

Correct AnswerverifiedShow Answer

A vitamin obtained that is a coenzyme in amino acid and lipid metabolism is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When the body is relying on internal energy reserves to continue meeting its energy demands, it is in the ________ state.

Correct AnswerverifiedShow Answer

The major anion in body fluids is

Correct AnswerverifiedShow Answer

The first steps of catabolism generally take place in the

Correct AnswerverifiedShow Answer

The citric acid cycle is an aerobic process because

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Lipids

Correct AnswerverifiedShow Answer

An ion that is a necessary component of high-energy compounds and nucleic acids and a structural componentof bone is the ________ ion.

Correct AnswerverifiedShow Answer

Fat-soluble vitamin overdoses primarily affect which organ?

Correct AnswerverifiedShow Answer

________ carry excess cholesterol from peripheral tissues to the liver.

Correct AnswerverifiedShow Answer

Define gluconeogenesis. What organs can it occur in? What precursors can be used? What is the outcome?

Correct AnswerverifiedGluconeogenesis is the synthesis of gluc...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Gluconeogenesis is the synthesis of gluc...
View Answer