Question 1

In living cells,the hydrolysis of ATP to ADP + P is the main supply of energy.ATP releases its energy in areas of the cell where some work is being carried out.If ATP underwent hydrolysis spontaneously,anywhere and at any time within a cell,would life as we know it be possible?

Accepted Answer

Answers may vary.Life as we know it woul...

Question 2

The sum of the chemical reactions in a cell constitute

Accepted Answer

A)  coupling reactions.
B)  free energy.
C)  endergonic reactions only.
D)  exergonic reactions only.
E)  metabolism.F) All of the above
G) A) and B)

Question 3

While we are sitting down to lunch,we are consuming ________ energy,which will then be converted into ________ energy as we work until dinner time.

Accepted Answer

A)  potential; kinetic
B)  kinetic; potential
C)  kinetic; free
D)  potential; storedE) B) and C)
F) A) and B)

Question 4

Which of the following labels is incorrectly identified?

Accepted Answer

A)  A refers to the products.
B)  B refers to the substrate-enzyme complex.
C)  C refers to the reactants.
D)  D refers to the product.E) A) and D)
F) All of the above

Question 5

Which form of energy is NOT correctly associated with the related example?

Accepted Answer

A)  kinetic energy: fat molecules
B)  kinetic energy: movement of muscles
C)  chemical energy: glucose
D)  potential energy: water held behind a dam
E)  potential energy: ATPF) D) and E)
G) B) and D)

Question 6

Which of the following is a true statement about enzyme inhibition?

Accepted Answer

A)  In competitive inhibition,the inhibitor binds to the active site of the enzyme.
B)  In noncompetitive inhibition,the inhibitor binds to the allosteric site of the enzyme.
C)  In irreversible inhibition,a poison binds to the enzyme so that it can never work again.
D)  Most inhibitors act in a reversible fashion.
E)  All of the statements are true.F) B) and D)
G) C) and D)

Question 7

If a change in pH alters an allosteric site where an inhibitor binds,it would be possible for an enzyme-controlled reaction to occur as normal.

Accepted Answer

A) True 
 B)False

Question 8

During the conversion of glucose into a free form of energy only some of the energy is converted into usable ATP.What happens to the rest of the energy?

Accepted Answer

A)  The energy is converted to heat.
B)  The energy is converted to CO2.
C)  The energy is released in H2O.
D)  The energy is converted into more glucose.E) C) and D)
F) All of the above

Question 9

________ represent(s) the first reactant(s) of this metabolic pathway and ________ represent(s) the end product(s) of this pathway. A → B → C → D → E

Accepted Answer

A)  A; E
B)  B; E
C)  A; D
D)  A and B; D and EE) None of the above
F) B) and C)

Question 10

In order to roll a rock down a hillside,you must first push it up the hill.Pushing the rock is analogous to the energy of activation of a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 11

All of the following would denature a protein except

Accepted Answer

A)  heating to temperatures above 100°C.
B)  addition of a strong acid.
C)  addition of a strong base.
D)  a missing coenzyme.E) None of the above
F) All of the above

Question 12

Analyze this figure to categorize the chemical reaction as a synthesis reaction or a degradation reaction.Cite evidence to support your answer.

Accepted Answer

The figure is a synthesis reac...

Question 13

In the reaction NAD → NADH,the NAD is ________,while the NADH is ________.

Accepted Answer

A)  reduced; oxidized
B)  oxidized; oxidized
C)  reduced; reduced
D)  oxidized; reducedE) B) and D)
F) None of the above

Question 14

ATP is considered to be

Accepted Answer

A)  an enzyme used widely in all kinds of cells.
B)  a coenzyme used to inhibit or activate different enzymes.
C)  a molecule that carries a great deal of chemical energy in a chemical bond.
D)  the precursor of a high-energy membrane-bounded protein.E) All of the above
F) A) and D)

Question 15

Coupling occurs when the energy released by an exergonic reaction is

Accepted Answer

A)  used to drive another exergonic reaction.
B)  used to drive an endergonic reaction.
C)  lost as nonusable heat to the environment.
D)  used to decrease the entropy of the universe.
E)  All of the choices are correct.F) None of the above
G) A) and B)

Question 16

Which of the following is an example of potential energy?

Accepted Answer

A)  a Snickers bar
B)  an apple
C)  a glass of milk
D)  All are examples of potential energy.E) A) and D)
F) A) and C)

Question 17

What does this graph reveal about the rate of reaction of the two different enzymes? What are the implications of this finding?

Accepted Answer

This graph shows that different enzymes ...

Question 18

An automobile engine is about 20 to 30% efficient in converting chemical energy to mechanical energy.Cells are about 39% efficient in the transformation of glucose to ATP.The rest of the energy is lost as heat.This is illustrative of the

Accepted Answer

A)  first law of thermodynamics.
B)  second law of thermodynamics.
C)  third law of thermodynamics.
D)  the cell theory.E) B) and C)
F) All of the above

Question 19

Analyze the graph.Label the following.  A.The energy of activation of the reaction with an enzyme.
B.The energy of activation of the reaction without an enzyme.
C.The energy of the reactants.
D.The energy of the products.

Accepted Answer

The answer of Analyze the graph.Label the following.  A.The...

Question 20

A living organism represents stored energy in the form of chemical compounds.When an organism dies,what happens to this stored energy?

Accepted Answer

A)  All chemicals immediately lose their high-energy bonds.
B)  All molecules immediately degrade into basic elements.
C)  All energy immediately leaves,and that is one manifestation that the organism is dead.
D)  The chemical compounds in cells lose their organization over time because there is no longer an input of energy to maintain the organized state.
E)  The chemical compounds remain exactly intact and ready to start up again unless digested by a consumer or decay organism.F) All of the above
G) C) and D)

Exam 6: Metabolism: Energy and Enzymes

Which form of energy is NOT correctly associated with the related example?

Correct AnswerverifiedShow Answer

An automobile engine is about 20 to 30% efficient in converting chemical energy to mechanical energy.Cells are about 39% efficient in the transformation of glucose to ATP.The rest of the energy is lost as heat.This is illustrative of the

Correct AnswerverifiedShow Answer

What does this graph reveal about the rate of reaction of the two different enzymes? What are the implications of this finding?

Correct AnswerverifiedThis graph shows that different enzymes ...View AnswerShow Answer

The sum of the chemical reactions in a cell constitute

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In the reaction NAD → NADH,the NAD is ________,while the NADH is ________.

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Analyze this figure to categorize the chemical reaction as a synthesis reaction or a degradation reaction.Cite evidence to support your answer.

Correct AnswerverifiedThe figure is a synthesis reac...View AnswerShow Answer

ATP is considered to be

Correct AnswerverifiedShow Answer

If a change in pH alters an allosteric site where an inhibitor binds,it would be possible for an enzyme-controlled reaction to occur as normal.

Correct AnswerverifiedShow Answer

In order to roll a rock down a hillside,you must first push it up the hill.Pushing the rock is analogous to the energy of activation of a chemical reaction.

Correct AnswerverifiedShow Answer

Which of the following is a true statement about enzyme inhibition?

Correct AnswerverifiedShow Answer

Analyze the graph.Label the following. A.The energy of activation of the reaction with an enzyme. B.The energy of activation of the reaction without an enzyme. C.The energy of the reactants. D.The energy of the products.

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All of the following would denature a protein except

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________ represent(s) the first reactant(s) of this metabolic pathway and ________ represent(s) the end product(s) of this pathway. A → B → C → D → E

Correct AnswerverifiedShow Answer

While we are sitting down to lunch,we are consuming ________ energy,which will then be converted into ________ energy as we work until dinner time.

Correct AnswerverifiedShow Answer

Which of the following labels is incorrectly identified?

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Coupling occurs when the energy released by an exergonic reaction is

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In living cells,the hydrolysis of ATP to ADP + P is the main supply of energy.ATP releases its energy in areas of the cell where some work is being carried out.If ATP underwent hydrolysis spontaneously,anywhere and at any time within a cell,would life as we know it be possible?

Correct AnswerverifiedAnswers may vary.Life as we know it woul...View AnswerShow Answer

Which of the following is an example of potential energy?

Correct AnswerverifiedShow Answer

A living organism represents stored energy in the form of chemical compounds.When an organism dies,what happens to this stored energy?

Correct AnswerverifiedShow Answer

During the conversion of glucose into a free form of energy only some of the energy is converted into usable ATP.What happens to the rest of the energy?

Correct AnswerverifiedShow Answer

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This graph shows that different enzymes ...
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In the reaction NAD → NADH,the NAD is ,while the NADH is .

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The figure is a synthesis reac...
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represent(s) the first reactant(s) of this metabolic pathway and represent(s) the end product(s) of this pathway. A → B → C → D → E

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While we are sitting down to lunch,we are consuming energy,which will then be converted into energy as we work until dinner time.

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Answers may vary.Life as we know it woul...
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