Question 1

During cellular respiration, when glucose is fully disassembled to carbon dioxide and water, the other reactant (with glucose) in the chemical equation is ________.

Accepted Answer

The answer of During cellular respiration, when glucose is fully...

Question 2

Lactase is an enzyme that digests lactose.

Accepted Answer

A) True 
 B)False

Question 3

Lactose intolerance is caused by the lack of the enzyme lactase, which is normally found in the

Accepted Answer

A)   lumen of the stomach.
B)   inside of cells of the liver and gall bladder.
C)   membranes of cells in the small intestine.
D)   inside of cells in the large intestine.
E)   endothelium of capillaries in the large intestine.F) All of the above
G) C) and E)

Question 4

The electron transport chain

Accepted Answer

A)   does not require oxygen, and involves proteins in the outer membrane of mitochondria.
B)   does not require oxygen, and involves proteins in the cristae of mitochondria.
C)   requires oxygen, and involves proteins in the outer membrane of mitochondria.
D)   requires oxygen, and involves proteins in the cristae of mitochondria.E) A) and D)
F) B) and D)

Question 5

Both pepsin and trypsin are proteins that digest proteins.

Accepted Answer

A) True 
 B)False

Question 6

Pyruvate dehydrogenase is located in the

Accepted Answer

A)   cytosol.
B)   cell membrane.
C)   outer compartment of the mitochondrion.
D)   middle of the crista.
E)   matrix of the mitochondrion.F) All of the above
G) A) and D)

Question 7

When oxygen is low, pyruvate is converted to lactate, while

Accepted Answer

A)   NADH is converted to NAD+.
B)   ATP is converted to AMP.
C)   citrate is converted to pyruvate.
D)   FADH is converted to NADH.
E)   FADH2 is reduced to FAD+.F) None of the above
G) A) and E)

Question 8

The coenzymes that will provide the electrons needed for the electron transport system are

Accepted Answer

A)   NADH and FADH2.
B)   NAD and FAD+.
C)   acetyl CoA and citrate.
D)   pyruvate and NADH.
E)   FAD and decarboxylase.F) C) and E)
G) B) and C)

Question 9

A chemical reaction occurs when chemical bonds in an existing molecule are broken and new ones are formed.

Accepted Answer

A) True 
 B)False

Question 10

The propagation of an impulse along the axon of a neuron is considered electrical energy, a form of kinetic energy.

Accepted Answer

A) True 
 B)False

Question 11

In a chemical reaction where an electron is exchanged from one reactant to another, the structure that loses an electron is

Accepted Answer

A)   analyzed.
B)   catalyzed.
C)   oxidized.
D)   reduced.E) A) and C)
F) A) and B)

Question 12

When an enzyme's conformational change results in the enzyme hugging the substrate in its active site, the action is referred to as the ________ model of enzyme function.

Accepted Answer

induced-fi...

Question 13

When our inner ears convert sound energy into neural impulses or our retinas convert light into neural impulses,

Accepted Answer

A)   no heat is generated, and so it is an exception to the first law of thermodynamics.
B)   it is an exception to both laws of thermodynamics, because no usable energy is lost.
C)   it is consistent with the second law of thermodynamics, but an exception to the first.
D)   the conversion is consistent with both laws of thermodynamics.E) All of the above
F) A) and B)

Question 14

Generally, a cell stores enough ATP to meet the energy requirements of a few

Accepted Answer

A)   seconds.
B)   minutes.
C)   hours.
D)   days.E) All of the above
F) A) and B)

Question 15

An isomerase bonds two similar molecules together to form a larger one.

Accepted Answer

A) True 
 B)False

Question 16

When we shiver on a cold day, the heat produced by muscle tissue is a demonstration of

Accepted Answer

A)   radiant potential energy.
B)   the first law of thermodynamics.
C)   the second law of thermodynamics.
D)   the creation of energy.E) A) and B)
F) A) and C)

Question 17

The region of an enzyme into which the substrate fits is a

Accepted Answer

A)   one-size-fits-all active site.
B)   highly specific active site.
C)   highly specific antibody.
D)   one-size-fits-all antibody.E) C) and D)
F) A) and C)

Question 18

Chemical reactions that release energy are called ________ reactions.

Accepted Answer

The answer of Chemical reactions that release energy are called...

Question 19

The reaction by which lactate is formed from pyruvate is catalyzed by lactate ________.

Accepted Answer

The answer of The reaction by which lactate is formed...

Question 20

Enzyme regulation by negative feedback involves

Accepted Answer

A)   allosteric inhibition of an enzyme by a product of its metabolic pathway.
B)   allosteric facilitation of an enzyme by a substrate of its metabolic pathway.
C)   allosteric modification of a substrate by an enzyme of an alternate metabolic pathway.
D)   occupation of the active site of an enzyme so that it catalyzes less efficiently.
E)   enhancement of the active site by a negatively charged substrate.F) A) and B)
G) A) and C)

Exam 3: Energy, Chemical Reactions, and Cellular Respiration

Pyruvate dehydrogenase is located in the

Correct AnswerverifiedShow Answer

The reaction by which lactate is formed from pyruvate is catalyzed by lactate ________.

Correct AnswerverifiedShow Answer

Lactase is an enzyme that digests lactose.

Correct AnswerverifiedShow Answer

When an enzyme's conformational change results in the enzyme hugging the substrate in its active site, the action is referred to as the ________ model of enzyme function.

Correct Answerverifiedinduced-fi...View AnswerShow Answer

Both pepsin and trypsin are proteins that digest proteins.

Correct AnswerverifiedShow Answer

An isomerase bonds two similar molecules together to form a larger one.

Correct AnswerverifiedShow Answer

The coenzymes that will provide the electrons needed for the electron transport system are

Correct AnswerverifiedShow Answer

When our inner ears convert sound energy into neural impulses or our retinas convert light into neural impulses,

Correct AnswerverifiedShow Answer

When we shiver on a cold day, the heat produced by muscle tissue is a demonstration of

Correct AnswerverifiedShow Answer

The electron transport chain

Correct AnswerverifiedShow Answer

Enzyme regulation by negative feedback involves

Correct AnswerverifiedShow Answer

When oxygen is low, pyruvate is converted to lactate, while

Correct AnswerverifiedShow Answer

The region of an enzyme into which the substrate fits is a

Correct AnswerverifiedShow Answer

In a chemical reaction where an electron is exchanged from one reactant to another, the structure that loses an electron is

Correct AnswerverifiedShow Answer

The propagation of an impulse along the axon of a neuron is considered electrical energy, a form of kinetic energy.

Correct AnswerverifiedShow Answer

Generally, a cell stores enough ATP to meet the energy requirements of a few

Correct AnswerverifiedShow Answer

Chemical reactions that release energy are called ________ reactions.

Correct AnswerverifiedShow Answer

A chemical reaction occurs when chemical bonds in an existing molecule are broken and new ones are formed.

Correct AnswerverifiedShow Answer

Lactose intolerance is caused by the lack of the enzyme lactase, which is normally found in the

Correct AnswerverifiedShow Answer

During cellular respiration, when glucose is fully disassembled to carbon dioxide and water, the other reactant (with glucose) in the chemical equation is ________.

Correct AnswerverifiedShow Answer

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