Question 1

In the reaction of methyl bromide and hydroxide the orientation of the C-H bonds flips. This is called ____________________.

Accepted Answer

inversion ...

Question 2

In the induced-fit model of the enzyme function, what is changing shape?

Accepted Answer

A)   the substrate only
B)   the enzyme only
C)   both the substrate and enzyme
D)   neither the substrate or enzymeE) A) and B)
F) None of the above

Question 3

The stages by which reactants are transformed into products is called ____________________.

Accepted Answer

the reacti...

Question 4

Activation energy refers to what energy in the reaction pathway?

Accepted Answer

A)   the energy of the reactants
B)   the difference in energy between the transition state and the products
C)   the difference in energy between products and reactants
D)   the difference in energy between the transition state and the reactants.E) None of the above
F) All of the above

Question 5

Activation energy is the energy input that is required to form the

Accepted Answer

A)   reactants.
B)   transition state.
C)   products.
D)   all of the aboveE) All of the above
F) A) and B)

Question 6

A reaction component with higher potential energy is more stable.

Accepted Answer

A) True 
 B)False

Question 7

Why are the transition metals good catalysts?

Accepted Answer

A)   They can form positive ions.
B)   They react readily with carbon monoxide.
C)   They can readily change oxidation state and absorb other substances on to their surface and activate them toward other reactions.
D)   They are good conductors of heat.E) B) and C)
F) None of the above

Question 8

Why would so few adults in East Asia be lactose tolerant?

Accepted Answer

Dairy farming was not common i...

Question 9

Describe the steps of a catalytic cycle.

Accepted Answer

(i) The enzyme and substrate bind to for...

Question 10

Milk contains the protein lactase.

Accepted Answer

A) True 
 B)False

Question 11

Two very similar molecules that differ only in being chiral, such as D- or L-, will always bind similarly to an enzyme.

Accepted Answer

A) True 
 B)False

Question 12

In the reaction CH3Br + OH-  CH3OH + Br-, what is the hypothesized shape of the transition state?

Accepted Answer

A)   tetrahedral
B)   trigonal planar
C)   trigonal bipyramidal
D)   octahedralE) A) and D)
F) B) and C)

Question 13

How does a catalyst lower the activation energy of a chemical reaction?

Accepted Answer

The catalysts binds ...

Question 14

Why are enzymes so highly selective in which substrates they bind?

Accepted Answer

The substrate and enzyme bind through co...

Question 15

The shape of the active site on the enzyme determines the binding of the substrate.

Accepted Answer

A) True 
 B)False

Question 16

The Inuit, indigenous people of the Arctic, rely on fish, sea mammals, and land animals for food. Would you expect them to be lactose tolerant or lactose intolerant?

Accepted Answer

Based upon the fact that they ...

Question 17

A transition metal catalyst speeds up reactions more than an enzyme.

Accepted Answer

A) True 
 B)False

Question 18

The purpose of an enzyme is to

Accepted Answer

A)   transport nutrients through the body.
B)   provide structure, such as hair or cell walls.
C)   speed the rate of a chemical reaction.
D)   transport oxygen throughout the body.E) A) and C)
F) B) and C)

Question 19

Explain how the induced-fit model of the enzyme allows the enzyme to catalyze reactions millions of times faster than a metal catalyst.

Accepted Answer

In the induced-fit model the enzyme and ...

Question 20

How is an enzyme capable of catalyzing more than one cycle of a reaction pathway?

Accepted Answer

Although the transition state in the rea...

Exam 14: Enzymes As Biological Catalysts

The stages by which reactants are transformed into products is called ____________________.

Correct Answerverifiedthe reacti...View AnswerShow Answer

The purpose of an enzyme is to

Correct AnswerverifiedShow Answer

In the induced-fit model of the enzyme function, what is changing shape?

Correct AnswerverifiedShow Answer

How is an enzyme capable of catalyzing more than one cycle of a reaction pathway?

Correct AnswerverifiedAlthough the transition state in the rea...View AnswerShow Answer

The Inuit, indigenous people of the Arctic, rely on fish, sea mammals, and land animals for food. Would you expect them to be lactose tolerant or lactose intolerant?

Correct AnswerverifiedBased upon the fact that they ...View AnswerShow Answer

Two very similar molecules that differ only in being chiral, such as D- or L-, will always bind similarly to an enzyme.

Correct AnswerverifiedShow Answer

Explain how the induced-fit model of the enzyme allows the enzyme to catalyze reactions millions of times faster than a metal catalyst.

Correct AnswerverifiedIn the induced-fit model the enzyme and ...View AnswerShow Answer

A transition metal catalyst speeds up reactions more than an enzyme.

Correct AnswerverifiedShow Answer

Why are enzymes so highly selective in which substrates they bind?

Correct AnswerverifiedThe substrate and enzyme bind through co...View AnswerShow Answer

In the reaction of methyl bromide and hydroxide the orientation of the C-H bonds flips. This is called ____________________.

Correct Answerverifiedinversion ...View AnswerShow Answer

In the reaction CH3Br + OH-  CH3OH + Br-, what is the hypothesized shape of the transition state?

Correct AnswerverifiedShow Answer

Why would so few adults in East Asia be lactose tolerant?

Correct AnswerverifiedDairy farming was not common i...View AnswerShow Answer

The shape of the active site on the enzyme determines the binding of the substrate.

Correct AnswerverifiedShow Answer

Activation energy is the energy input that is required to form the

Correct AnswerverifiedShow Answer

How does a catalyst lower the activation energy of a chemical reaction?

Correct AnswerverifiedThe catalysts binds ...View AnswerShow Answer

Describe the steps of a catalytic cycle.

Correct Answerverified(i) The enzyme and substrate bind to for...View AnswerShow Answer

A reaction component with higher potential energy is more stable.

Correct AnswerverifiedShow Answer

Milk contains the protein lactase.

Correct AnswerverifiedShow Answer

Activation energy refers to what energy in the reaction pathway?

Correct AnswerverifiedShow Answer

Why are the transition metals good catalysts?

Correct AnswerverifiedShow Answer

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the reacti...
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Although the transition state in the rea...
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Based upon the fact that they ...
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In the induced-fit model the enzyme and ...
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The substrate and enzyme bind through co...
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inversion ...
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In the reaction CH₃Br + OH^-  CH₃OH + Br^-, what is the hypothesized shape of the transition state?

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Dairy farming was not common i...
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The catalysts binds ...
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(i) The enzyme and substrate bind to for...
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Correct Answer
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