Question 1

Enzymes ______________ the rate of a specific chemical reaction.

Accepted Answer

A) decrease 
B) increase 
C) have no effect on 
A) decrease 
B) increase 
C) have no effect on

Question 2

Endergonic reactions cause the amount of entropy in the products to be

Accepted Answer

A) increased. 
B) decreased. 
C) unchanged. 
A) increased. 
B) decreased. 
C) unchanged.

Question 3

An enzyme-catalyzed reaction in the body at 50F1F1F1S1F1F1F10C will proceed at a faster rate than at 37F1F1F1S1F1F1F10C.

Accepted Answer

A) True 
 B)False

Question 4

A defect in the enzyme that catalyzes the formation of melanin from DOPA results in

Accepted Answer

A) phenylketonuriA. 
B) albinism. 
C) lactose intolerance. 
D) maple-syrup disease. 
A) phenylketonuriA. 
B) albinism. 
C) lactose intolerance. 
D) maple-syrup disease.

Question 5

Free energy is ______________ when exergonic reactions proceed.

Accepted Answer

A) increased 
B) decreased 
C) unchanged 
A) increased 
B) decreased 
C) unchanged

Question 6

A reducing agent

Accepted Answer

A) donates protons to an atom or molecule. 
B) donates electrons to an atom or molecule. 
C) accepts protons from an atom or molecule. 
D) accepts electrons from an atom or molecule. 
E) Both donates electrons and donates protons are correct. 
A) donates protons to an atom or molecule. 
B) donates electrons to an atom or molecule. 
C) accepts protons from an atom or molecule. 
D) accepts electrons from an atom or molecule. 
E) Both donates electrons and donates protons are correct.

Question 7

The MM isoenzyme of creatine phosphokinase is found in diseased skeletal muscle.

Accepted Answer

A) True 
 B)False

Question 8

______________ are inactive forms of digestive enzymes.

Accepted Answer

A) Cofactors 
B) Coenzymes 
C) Zymogens 
D) Both cofactors and zymogens are correct. 
A) Cofactors 
B) Coenzymes 
C) Zymogens 
D) Both cofactors and zymogens are correct.

Question 9

NAD is derived from the vitamin

Accepted Answer

A) B-12,cobalamin. 
B) B-3,niacin. 
C) B-2,riboflavin. 
D) B-6,pyridoxine 
A) B-12,cobalamin. 
B) B-3,niacin. 
C) B-2,riboflavin. 
D) B-6,pyridoxine

Question 10

Biological catalysts

Accepted Answer

A) decrease reaction rates. 
B) alter a reaction product. 
C) remain unchanged at the end of the reaction. 
D) All apply. 
A) decrease reaction rates. 
B) alter a reaction product. 
C) remain unchanged at the end of the reaction. 
D) All apply.

Question 11

A molecule that gains a hydrogen is also oxidized.

Accepted Answer

A) True 
 B)False

Question 12

Elevated plasma aldolase could be indicative of

Accepted Answer

A) muscular dystrophy. 
B) pancreatitis. 
C) pernicious anemia. 
D) prostate cancer. 
A) muscular dystrophy. 
B) pancreatitis. 
C) pernicious anemia. 
D) prostate cancer.

Question 13

Most enzymes are lipids.

Accepted Answer

A) True 
 B)False

Question 14

Decreased phenylalanine metabolism causes

Accepted Answer

A) albinism. 
B) hypercholeteremia. 
C) lactose intolerance. 
D) Tay-Sachs disease. 
A) albinism. 
B) hypercholeteremia. 
C) lactose intolerance. 
D) Tay-Sachs disease.

Question 15

Oxidizing agents accept electrons from molecules undergoing reduction.

Accepted Answer

A) True 
 B)False

Question 16

Isoenzymes bind different substrates and catalyze different chemical reactions.

Accepted Answer

A) True 
 B)False

Question 17

During oxidation,a molecule or atom

Accepted Answer

A) gains protons. 
B) loses protons. 
C) gains electrons. 
D) loses electrons. 
A) gains protons. 
B) loses protons. 
C) gains electrons. 
D) loses electrons.

Question 18

The enzyme with the lowest pH optimum is

Accepted Answer

A) acid phosphatase. 
B) lipase. 
C) monoamine oxidase. 
D) pepsin. 
A) acid phosphatase. 
B) lipase. 
C) monoamine oxidase. 
D) pepsin.

Question 19

Enzymes in a metabolic pathway act antagonistically to produce a final product.

Accepted Answer

A) True 
 B)False

Question 20

An enzyme elevated in the plasma of men with prostate cancer is

Accepted Answer

A) alkaline phosphatase. 
B) catalase. 
C) creatine kinase. 
D) acid phosphatase. 
A) alkaline phosphatase. 
B) catalase. 
C) creatine kinase. 
D) acid phosphatase.

Enzymes ______________ the rate of a specific chemical reaction.

Endergonic reactions cause the amount of entropy in the products to be

An enzyme-catalyzed reaction in the body at 50C will proceed at a faster rate than at 37C.

A defect in the enzyme that catalyzes the formation of melanin from DOPA results in

Free energy is ______________ when exergonic reactions proceed.

A reducing agent

The MM isoenzyme of creatine phosphokinase is found in diseased skeletal muscle.

______________ are inactive forms of digestive enzymes.

NAD is derived from the vitamin

Biological catalysts

A molecule that gains a hydrogen is also oxidized.

Elevated plasma aldolase could be indicative of

Most enzymes are lipids.

Decreased phenylalanine metabolism causes

Oxidizing agents accept electrons from molecules undergoing reduction.

Isoenzymes bind different substrates and catalyze different chemical reactions.

During oxidation,a molecule or atom

The enzyme with the lowest pH optimum is

Enzymes in a metabolic pathway act antagonistically to produce a final product.

An enzyme elevated in the plasma of men with prostate cancer is

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Cell Respiration and Metabolism

Interactions Between Cells and the Extracellular Environment

The Nervous System: Neurons and Synapses

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Muscle: Mechanisms of Contraction and Neural Control

Blood,Heart and Circulation

Cardiac Output,Blood Flow,and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

The Digestive System

Regulation and Metabolism

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Exam 4: Enzymes and Energy

Enzymes ______________ the rate of a specific chemical reaction.

Endergonic reactions cause the amount of entropy in the products to be

An enzyme-catalyzed reaction in the body at 50C will proceed at a faster rate than at 37C.

A defect in the enzyme that catalyzes the formation of melanin from DOPA results in

Free energy is ______________ when exergonic reactions proceed.

A reducing agent

The MM isoenzyme of creatine phosphokinase is found in diseased skeletal muscle.

______________ are inactive forms of digestive enzymes.

NAD is derived from the vitamin

Biological catalysts

A molecule that gains a hydrogen is also oxidized.

Elevated plasma aldolase could be indicative of

Most enzymes are lipids.

Decreased phenylalanine metabolism causes

Oxidizing agents accept electrons from molecules undergoing reduction.

Isoenzymes bind different substrates and catalyze different chemical reactions.

During oxidation,a molecule or atom

The enzyme with the lowest pH optimum is

Enzymes in a metabolic pathway act antagonistically to produce a final product.

An enzyme elevated in the plasma of men with prostate cancer is

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Cell Respiration and Metabolism

Interactions Between Cells and the Extracellular Environment

The Nervous System: Neurons and Synapses

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Muscle: Mechanisms of Contraction and Neural Control

Blood,Heart and Circulation

Cardiac Output,Blood Flow,and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

The Digestive System

Regulation and Metabolism

Reproduction

Filters