Question 1

Cells can use (active/allosteric/substrate) sites to regulate enzyme activity and thereby control their metabolism.

Accepted Answer

The answer of Cells can use (active/allosteric/substrate) sites to regulate...

Question 2

The conversion of amino acids to carbohydrates is an example of

Accepted Answer

A)   amination.
B)   gluconeogenesis.
C)   substrate-level phosphorylation.
D)   beta-oxidation.
E)   electron transport.F) All of the above
G) A) and E)

Question 3

Discuss the interrelationships between anabolic and catabolic pathways. Provide specific examples in your answer.

Accepted Answer

Catabolic pathways generate the energy r...

Question 4

Amino acids are converted to substrates of the Krebs cycle by (beta-oxidation/deamination/transamination).

Accepted Answer

The answer of Amino acids are converted to substrates of...

Question 5

All substrates for ribozymes are RNA molecules.

Accepted Answer

A) True 
 B)False

Question 6

Noncyclic photophosphorylation produces

Accepted Answer

A)   ATP only.
B)   oxygen.
C)   NADPH only.
D)   ATP and NADPH.
E)   water and ATP.F) A) and B)
G) A) and C)

Question 7

If a cell reverses the process of beta-oxidation, which of the following molecules will it make?

Accepted Answer

A)   glycerol
B)   amino acids
C)   fatty acids
D)   nucleotides
E)   starchF) All of the above
G) D) and E)

Question 8

Which of the following is TRUE concerning the structure and function of enzymes?

Accepted Answer

A)   All enzymes bind cofactors necessary for their function.
B)   An apoenzyme is a combination of a cofactor bound to a holoenzyme.
C)   Enzymes can function at a wide range of pH.
D)   Competitive inhibition of an enzyme occurs when an inhibitor binds to an allosteric site on the enzyme.
E)   After an enzyme has catalyzed a reaction, it resumes its original shape and can interact with a new substrate molecule.F) A) and B)
G) A) and C)

Question 9

The conversion of pyruvic acid to acetyl-CoA can be described as ________, because a molecule of CO₂ is produced as a by-product.

Accepted Answer

A)   decarboxylation
B)   amination
C)   respiration
D)   oxidation
E)   phosphorylationF) A) and B)
G) C) and D)

Question 10

The process illustrated in the figure above is an example of a(n)  ________ reaction.

Accepted Answer

A)   amination
B)   reduction
C)   oxidation
D)   transamination
E)   transferaseF) C) and D)
G) A) and C)

Question 11

Another term for a protein catalyst is a(n) (enzyme/ribozyme).

Accepted Answer

The answer of Another term for a protein catalyst is...

Question 12

The purpose of electron transport is to create a proton (concentration/gradient/pump) across a membrane that can then be used to make ATP.

Accepted Answer

The answer of The purpose of electron transport is to...

Question 13

During chemiosmosis, electrons are pumped across a membrane to produce ATP.

Accepted Answer

A) True 
 B)False

Question 14

Substrate-level phosphorylation occurs during which of the following stage(s)  of glucose catabolism?

Accepted Answer

A)   formation of acetyl-CoA
B)   lysis stage of glycolysis
C)   energy-conservation stage of glycolysis
D)   Krebs cycle
E)   formation of acetyl-CoA and the Krebs cycleF) B) and E)
G) A) and C)

Question 15

The molecule that an enzyme acts upon is known as its

Accepted Answer

A)   substrate.
B)   coenzyme.
C)   apoenzyme.
D)   product.
E)   catalyst.F) All of the above
G) None of the above

Question 16

Chemical reactions that can proceed toward either anabolism or catabolism are called

Accepted Answer

A)   glycolytic.
B)   light-independent.
C)   synthetic.
D)   cyclic.
E)   amphibolic.F) All of the above
G) B) and D)

Question 17

The various types of chlorophyll differ in the

Accepted Answer

A)   amount of light they can absorb.
B)   amount of ATP they produce.
C)   number of electrons they release.
D)   amount of oxygen they utilize.
E)   wavelengths of light they absorb.F) A) and C)
G) All of the above

Question 18

An organic compound gains an electron from another molecule. The organic compound

Accepted Answer

A)   has been oxidized.
B)   is an electron donor.
C)   has been reduced.
D)   has become more positively charged.
E)   has lost a hydrogen atom.F) D) and E)
G) A) and B)

Question 19

Which of the following is associated with the Calvin-Benson cycle?

Accepted Answer

A)   acetyl-CoA
B)   TMAO
C)   RuBP
D)   FADH₂
E)   PABAF) A) and C)
G) A) and D)

Question 20

The reactions of photosynthesis take place in the ________ of prokaryotes.

Accepted Answer

A)   thylakoids
B)   cytoplasm
C)   nucleoid
D)   cristae
E)   outer membraneF) A) and D)
G) B) and E)

Exam 5: Microbial Metabolism

Discuss the interrelationships between anabolic and catabolic pathways. Provide specific examples in your answer.

Correct AnswerverifiedCatabolic pathways generate the energy r...View AnswerShow Answer

Cells can use (active/allosteric/substrate) sites to regulate enzyme activity and thereby control their metabolism.

Correct AnswerverifiedShow Answer

The reactions of photosynthesis take place in the ________ of prokaryotes.

Correct AnswerverifiedShow Answer

Another term for a protein catalyst is a(n) (enzyme/ribozyme).

Correct AnswerverifiedShow Answer

The molecule that an enzyme acts upon is known as its

Correct AnswerverifiedShow Answer

If a cell reverses the process of beta-oxidation, which of the following molecules will it make?

Correct AnswerverifiedShow Answer

The process illustrated in the figure above is an example of a(n) ________ reaction.

Correct AnswerverifiedShow Answer

The conversion of amino acids to carbohydrates is an example of

Correct AnswerverifiedShow Answer

During chemiosmosis, electrons are pumped across a membrane to produce ATP.

Correct AnswerverifiedShow Answer

The purpose of electron transport is to create a proton (concentration/gradient/pump) across a membrane that can then be used to make ATP.

Correct AnswerverifiedShow Answer

Which of the following is TRUE concerning the structure and function of enzymes?

Correct AnswerverifiedShow Answer

Which of the following is associated with the Calvin-Benson cycle?

Correct AnswerverifiedShow Answer

The various types of chlorophyll differ in the

Correct AnswerverifiedShow Answer

An organic compound gains an electron from another molecule. The organic compound

Correct AnswerverifiedShow Answer

Noncyclic photophosphorylation produces

Correct AnswerverifiedShow Answer

Substrate-level phosphorylation occurs during which of the following stage(s) of glucose catabolism?

Correct AnswerverifiedShow Answer

The conversion of pyruvic acid to acetyl-CoA can be described as ________, because a molecule of CO₂ is produced as a by-product.

Correct AnswerverifiedShow Answer

All substrates for ribozymes are RNA molecules.

Correct AnswerverifiedShow Answer

Amino acids are converted to substrates of the Krebs cycle by (beta-oxidation/deamination/transamination).

Correct AnswerverifiedShow Answer

Chemical reactions that can proceed toward either anabolism or catabolism are called

Correct AnswerverifiedShow Answer

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Catabolic pathways generate the energy r...
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