Question 1

Altering the three-dimensional structure of an enzyme might

Accepted Answer

A)  prevent the substrate from binding the enzyme's active site.
B)  change the type of substrate that binds the enzyme's active site.
C)  change the amount of energy needed for a reaction.
D)  change the type of product produced in the reaction.
E)  prevent the enzyme from adding energy to a reaction.F) C) and D)
G) A) and E)

Question 2

Bacteria that produce nitrite ( NO2- ) during anaerobic respiration would use this as their final electron acceptor.

Accepted Answer

A)  N2
B)  O2
C)  N2O
D)  NO3-E) B) and D)
F) B) and C)

Question 3

The amount of available energy that can be used to do work is called

Accepted Answer

A)  kinetic energy.
B)  entropy.
C)  enthalpy.
D)  free energy.
E)  heat.F) None of the above
G) A) and C)

Question 4

All of the following are a form of potential energy that can be used by a cell EXCEPT

Accepted Answer

A)  nitrogen.
B)  NADH.
C)  an electrical/ion gradient.
D)  ATP.
E)  concentration gradient.F) None of the above
G) A) and E) A

Question 5

A chemical reaction that has a positive  Δ\DeltaΔ G is correctly described as

Accepted Answer

A)  spontaneous
B)  endergonic.
C)  exothermiC.
D)  enthalpic.
E)  endothermic. F) B) and C)
G) All of the above

Question 6

Temperature,pH,and ionic concentrations each play an important role in the proper functioning of enzymes.

Accepted Answer

A) True 
 B)False

Question 7

Some bacteria can use sulfur instead of oxygen as a final electron acceptor.What would they produce during anaerobic respiration?

Accepted Answer

A)  S2
B)  H2O
C)  O2
D)  H2SE) B) and D)
F) A) and C)

Question 8

Cellular respiration produces the most energy in the form of ATP from

Accepted Answer

A)  the production of lactate
B)  glycolysis
C)  substrate-level phosphorylation
D)  oxidative phosphorylation
E)  the citric acid cycleF) A) and B)
G) A) and D)

Question 9

If one were to double the amount of enzyme in a reaction with an initial  Δ\DeltaΔ G of -5 kcal/mole,what would the  Δ\DeltaΔ G be?

Accepted Answer

A)  +5 kcal/mole
B)  -5 kcal/mole
C)  -20 kcal/mole
D)  -10 kcal/mole
E)  +10 kcal/mole F) C) and D)
G) A) and D)

Question 10

How can a living cell increase the rate of a chemical reaction?

Accepted Answer

A)  By raising the pH of the cytoplasm.
B)  By increasing the entropy of the reactants.
C)  By lowering the pH of the cytoplasm.
D)  By raising the temperature.
E)  By using a catalyst.F) C) and D)
G) A) and B)

Question 11

The primary function of an enzyme or any biological catalyst is to

Accepted Answer

A)  increase the rate of a reaction.
B)  reduce the energy of activation of a reaction.
C)  increase the rate of a reaction and change the direction of a reaction.
D)  change the direction of a reaction.
E)  reduce the energy of activation and increase the rate of a reaction.F) A) and B)
G) A) and C)

Question 12

A logical consequence of the second law of thermodynamics could be stated,

Accepted Answer

A)  every chemical reaction must increase the total entropy of the universe.
B)  if the entropy of a system increases,there must be a corresponding decrease in the entropy of the universe.
C)  every energy transfer requires activation energy from the environment.
D)  if there is an increase in the energy of a system,there must be a corresponding decrease in the energy of the rest of the universe.
E)  energy can be transferred or transformed,but it cannot be created or destroyed.F) A) and E)
G) None of the above

Question 13

During the cleavage stage of glycolysis,fructose-1,6 biphosphate is broken down into

Accepted Answer

A)  citric acid.
B)  two molecules of ATP.
C)  two molecules of pyruvate.
D)  two molecules of glyceraldehyde-3-phosphate.
E)  glucosE.F) A) and D)
G) C) and D)

Question 14

In addition to ATP,what are the end products of glycolysis?

Accepted Answer

A)  CO2 and NADH
B)  CO2 and pyruvate
C)  H2O,NADH,and citrate
D)  NADH and pyruvate
E)  CO2 and H2OF) B) and E)
G) A) and D) D

Question 15

In photosynthesis,carbon dioxide gas is reduced and combined to form glucose.This is an example of

Accepted Answer

A)  metabolism.
B)  hydrolysis.
C)  catabolism.
D)  exergonic.
E)  anabolism.F) C) and E)
G) B) and D)

Question 16

In the citric acid cycle,some intermediates are used in other metabolic reactions.Which of the following adaptations would need to be made by a cell in response to this?

Accepted Answer

A)  Cells would have to use energy sources other than glucose for metabolism.
B)  Some oxaloacetate would need to be produced through an alternative pathway to combine with acetyl CoA.
C)  Some citrate would need to be produced through an alternative pathway to combine with acetyl CoA.
D)  The citric acid cycle would eventually shut down when it ran out of intermediates and the cell would switch to glycolysis.E) B) and C)
F) A) and B) B

Question 17

Energy released by the electron transport chain is used to pump H+ ions into which location?

Accepted Answer

A)  mitochondrial matrix
B)  mitochondrial outer membrane
C)  cytosol
D)  mitochondrial inner membrane
E)  mitochondrial intermembrane spaceF) A) and B)
G) A) and C)

Question 18

What is produced during the citric acid cycle?

Accepted Answer

A)  Pyruvate,ATP and NADH.
B)  ATP and NAD+.
C)  ATP,NADH,and FADH2.
D)  Oxygen.
E)  A proton gradient.F) A) and D)
G) None of the above

Question 19

During glycolysis,glucose is broken down into

Accepted Answer

A)  pyruvate.
B)  ATP.
C)  oxygen.
D)  acetyl CoA.
E)  NADH.F) C) and D)
G) B) and E)

Question 20

Catabolic and anabolic reactions in living cells involve the transfer of electrons from one molecule to another in reduction-oxidation reactions.

Accepted Answer

A) True 
 B)False

Exam 6: Energy, Enzymes, and Cellular Respiration

Altering the three-dimensional structure of an enzyme might

Correct AnswerverifiedShow Answer

Bacteria that produce nitrite ( NO2- ) during anaerobic respiration would use this as their final electron acceptor.

Correct AnswerverifiedShow Answer

The amount of available energy that can be used to do work is called

Correct AnswerverifiedShow Answer

All of the following are a form of potential energy that can be used by a cell EXCEPT

Correct AnswerverifiedA

A chemical reaction that has a positive Δ\DeltaΔ G is correctly described as

Correct AnswerverifiedShow Answer

Temperature,pH,and ionic concentrations each play an important role in the proper functioning of enzymes.

Correct AnswerverifiedShow Answer

Some bacteria can use sulfur instead of oxygen as a final electron acceptor.What would they produce during anaerobic respiration?

Correct AnswerverifiedShow Answer

Cellular respiration produces the most energy in the form of ATP from

Correct AnswerverifiedShow Answer

If one were to double the amount of enzyme in a reaction with an initial Δ\DeltaΔ G of -5 kcal/mole,what would the Δ\DeltaΔ G be?

Correct AnswerverifiedShow Answer

How can a living cell increase the rate of a chemical reaction?

Correct AnswerverifiedShow Answer

The primary function of an enzyme or any biological catalyst is to

Correct AnswerverifiedShow Answer

A logical consequence of the second law of thermodynamics could be stated,

Correct AnswerverifiedShow Answer

During the cleavage stage of glycolysis,fructose-1,6 biphosphate is broken down into

Correct AnswerverifiedShow Answer

In addition to ATP,what are the end products of glycolysis?

Correct AnswerverifiedD

In photosynthesis,carbon dioxide gas is reduced and combined to form glucose.This is an example of

Correct AnswerverifiedShow Answer

In the citric acid cycle,some intermediates are used in other metabolic reactions.Which of the following adaptations would need to be made by a cell in response to this?

Correct AnswerverifiedB

Energy released by the electron transport chain is used to pump H+ ions into which location?

Correct AnswerverifiedShow Answer

What is produced during the citric acid cycle?

Correct AnswerverifiedShow Answer

During glycolysis,glucose is broken down into

Correct AnswerverifiedShow Answer

Catabolic and anabolic reactions in living cells involve the transfer of electrons from one molecule to another in reduction-oxidation reactions.

Correct AnswerverifiedShow Answer

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Bacteria that produce nitrite ( NO₂^- ) during anaerobic respiration would use this as their final electron acceptor.

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A

A chemical reaction that has a positive $\Delta$ G is correctly described as

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If one were to double the amount of enzyme in a reaction with an initial $\Delta$ G of -5 kcal/mole,what would the $\Delta$ G be?

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D

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B

Energy released by the electron transport chain is used to pump H⁺ ions into which location?

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