Question 1

Part of the complete enzyme;nonprotein,organic component.

Accepted Answer

A)  active site
B)  substrate
C)  coenzyme
D)  non-catalytic binding siteE) None of the above
F) A) and C)

Question 2

A new antibiotic has been developed that will use competitive inhibitor enzyme inhibition.This means that the

Accepted Answer

A)  antibiotic will compete for substrate binding sites on the enzyme.
B)  antibiotic will compete for binding sites on the substrate.
C)  antibiotic will compete for binding sites on the enzyme-substrate complex.
D)  antibiotic will compete for binding sites on the product that is being produceD.
E)  antibiotic will only compete for binding sites on the receptor proteins embedded in the phospholipid bilayer.F) A) and D)
G) A) and E)

Question 3

The chemistry of living systems representing all chemical reactions is called

Accepted Answer

A)  catabolism.
B)  anabolism.
C)  metabolism.
D)  enzymology.
E)  thermodynamics.F) B) and E)
G) C) and D)

Question 4

If you were an enzyme and needed to perform the energetically unfavorable conversion of X to Y,you would

Accepted Answer

A)  couple it to a second reaction associated with a large decrease in free energy.
B)  couple it to a second reaction associated with a large increase in free energy.
C)  couple it to the formation of ATP from ADP and Pi.
D)  couple it to an endergonic reaction.E) A) and D)
F) B) and C)

Question 5

Hemoglobin is a protein composed of four subunits,each with a binding site for oxygen.When a molecule of O2 binds to any one of the subunits,the affinity of the other three subunits for O2 is increased.What role is oxygen playing in this process?

Accepted Answer

A)  enzyme
B)  allosteric activator
C)  allosteric inhibitor
D)  substrateE) A) and C)
F) None of the above

Question 6

A ribozyme catalyzes a reaction on itself and actually changes shape.This is an example of

Accepted Answer

A)  intra-enzyme reactions
B)  inter-enzyme reactions
C)  intramolecular catalysis
D)  intermolecular catalysisE) None of the above
F) A) and D)

Question 7

The organic non-protein components that aid in enzyme functioning are called

Accepted Answer

A)  reactants.
B)  cofactors.
C)  coenzymes.
D)  substrates.
E)  products.F) None of the above
G) C) and E)

Question 8

A chemical reaction which requires energy is called an ________________ reaction.

Accepted Answer

A)  exergonic
B)  endergonic
C)  explosive
D)  heatingE) A) and B)
F) A) and C)

Question 9

One type of biochemical pathway regulation is referred to as feedback inhibition.This means that as the

Accepted Answer

A)  cell produces more quantity of product through a biochemical pathway,the build up of that product will inhibit the activity of that product's production.
B)  cell produces more quantity of product through a biochemical pathway,the activity will be increased or stimulated by the build up of that product.
C)  cell produces less quantity of product through a biochemical pathway,the activity will be inhibited by not having enough of that product.
D)  cell produces less quantity of product through a biochemical pathway,the activity of the substrate will be increased and that it will exceed capacity of the pathway.E) A) and B)
F) A) and C)

Question 10

After getting off the ski lift,you choose a trail that requires you to ski up a small incline before beginning the downward section of the trail.In this scenario,the hill is analogous to

Accepted Answer

A)  free energy.
B)  potential energy.
C)  kinetic energy.
D)  activation energy.E) A) and B)
F) A) and C)

Question 11

When an atom or molecule gains one or more electrons,it is said to be

Accepted Answer

A)  energized.
B)  oxidized.
C)  polarized.
D)  activateD.
E)  reduced.F) A) and E)
G) D) and E)

Question 12

Enzymes catalyze chemical reactions by lowering the

Accepted Answer

A)  entropy.
B)  free energy.
C)  activation energy.
D)  enthalpy.
E)  calories.F) D) and E)
G) C) and D)

Question 13

A new antibiotic has been developed that will use noncompetitive inhibitor enzyme inhibition.This means that the

Accepted Answer

A)  antibiotic will bind to the enzyme and alter the shape of the enzyme.
B)  antibiotic will bind to the substrate and alter the shape of the substrate.
C)  antibiotic will bind to the enzyme-substrate complex and alter its shape.
D)  antibiotic will bind to the product that is being produced and alter its shape.
E)  antibiotic will bind to the receptor proteins embedded in the phospholipid bilayer,which will in turn close the channels.F) C) and D)
G) D) and E)

Question 14

Reactions that do not proceed spontaneously because they require energy from an outside source are called

Accepted Answer

A)  exergonic.
B)  xerogonic.
C)  metaboliC.
D)  endergonic.
E)  endocytic.F) C) and E)
G) B) and C)

Question 15

A series of sequential chemical reactions which are maintained in the cell are called:

Accepted Answer

A)  chemical reactions
B)  biochemical pathways
C)  energy steps
D)  second messenger cascadesE) A) and B)
F) A) and C)

Question 16

The substance on which the enzyme works;the raw material of the reaction.

Accepted Answer

A)  active site
B)  substrate
C)  coenzyme
D)  non-catalytic binding siteE) B) and C)
F) C) and D)

Question 17

The sites where molecules other than substrates bind in an enzyme to alter its activity are called ____________ sites.

Accepted Answer

A)  catalytic
B)  allosteric
C)  metabolic
D)  amino acid
E)  activityF) A) and D)
G) D) and E)

Question 18

In the hypothetical biochemical pathway,P  →\rarr→ Q + R  →\rarr→  S  →\rarr→ T,which step is likely to have evolved first?

Accepted Answer

A)  P  →\rarr→  Q
B)  Q + R
C)  R  →\rarr→  S
D)  S  →\rarr→  T E) All of the above
F) None of the above

Question 19

Oxidation and reduction reactions are chemical processes that result in a gain or loss in

Accepted Answer

A)  atoms.
B)  neutrons.
C)  electrons.
D)  molecules.
E)  protons.F) D) and E)
G) C) and D)

Question 20

Energy is defined as:

Accepted Answer

A)  heat
B)  the capacity to do work
C)  change
D)  movementE) A) and B)
F) None of the above

Exam 6: Energy and Metabolism

A ribozyme catalyzes a reaction on itself and actually changes shape.This is an example of

Correct AnswerverifiedShow Answer

The substance on which the enzyme works;the raw material of the reaction.

Correct AnswerverifiedShow Answer

The organic non-protein components that aid in enzyme functioning are called

Correct AnswerverifiedShow Answer

A new antibiotic has been developed that will use competitive inhibitor enzyme inhibition.This means that the

Correct AnswerverifiedShow Answer

A new antibiotic has been developed that will use noncompetitive inhibitor enzyme inhibition.This means that the

Correct AnswerverifiedShow Answer

If you were an enzyme and needed to perform the energetically unfavorable conversion of X to Y,you would

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When an atom or molecule gains one or more electrons,it is said to be

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After getting off the ski lift,you choose a trail that requires you to ski up a small incline before beginning the downward section of the trail.In this scenario,the hill is analogous to

Correct AnswerverifiedShow Answer

A series of sequential chemical reactions which are maintained in the cell are called:

Correct AnswerverifiedShow Answer

In the hypothetical biochemical pathway,P →\rarr→ Q + R →\rarr→ S →\rarr→ T,which step is likely to have evolved first?

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The chemistry of living systems representing all chemical reactions is called

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Part of the complete enzyme;nonprotein,organic component.

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The sites where molecules other than substrates bind in an enzyme to alter its activity are called ____________ sites.

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Hemoglobin is a protein composed of four subunits,each with a binding site for oxygen.When a molecule of O2 binds to any one of the subunits,the affinity of the other three subunits for O2 is increased.What role is oxygen playing in this process?

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Oxidation and reduction reactions are chemical processes that result in a gain or loss in

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A chemical reaction which requires energy is called an ________________ reaction.

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Energy is defined as:

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Enzymes catalyze chemical reactions by lowering the

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Reactions that do not proceed spontaneously because they require energy from an outside source are called

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One type of biochemical pathway regulation is referred to as feedback inhibition.This means that as the

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In the hypothetical biochemical pathway,P $\rarr$ Q + R $\rarr$ S $\rarr$ T,which step is likely to have evolved first?

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Hemoglobin is a protein composed of four subunits,each with a binding site for oxygen.When a molecule of O₂ binds to any one of the subunits,the affinity of the other three subunits for O₂ is increased.What role is oxygen playing in this process?

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