Question 1

The amount of energy required for a reaction to occur is its activation energy.

Accepted Answer

A) True 
 B)False

Question 2

When a noncompetitive inhibitor molecule binds to a(n) (active/allosteric/substrate) site on an enzyme, the shape of the active site changes so that the substrate molecules can no longer bind.

Accepted Answer

allosteric

Question 3

Hydrolases are generally involved in ________ reactions.

Accepted Answer

A)   anabolic
B)   catabolic
C)   both anabolic and catabolic
D)   neither anabolic nor catabolic
E)   oxidation-reductionF) B) and E)
G) B) and C)

Question 4

Which of the following produces NADPH?

Accepted Answer

A)   the pentose phosphate pathway only
B)   the Calvin-Benson cycle only
C)   the Embden-Meyerhof pathway only
D)   both the Embden-Meyerhof and Calvin-Benson cycle pathways
E)   both the pentose phosphate and Entner-Doudoroff pathwaysF) B) and E)
G) B) and D)

Question 5

How many ATP molecules can theoretically be produced from the NADH generated by the catabolism of a molecule of glucose during aerobic respiration?

Accepted Answer

A)   34
B)   30
C)   38
D)   36
E)   4F) B) and D)
G) A) and C) B

Question 6

Some bacteria use (acetyl-CoA/DHAP/TMAO) as a final electron receptor, resulting in a detectable odor.

Accepted Answer

The answer of Some bacteria use (acetyl-CoA/DHAP/TMAO) as a final...

Question 7

Which of the following is the CORRECT sequence of stages in glycolysis?

Accepted Answer

A)   energy-conservation, energy-investment, lysis
B)   lysis, energy-investment, energy-conservation
C)   energy-investment, lysis, energy-conservation
D)   lysis,energy-conservation, energy-investment
E)   energy-investment, energy-conservation, lysisF) A) and B)
G) None of the above

Question 8

Essential amino acids are amino acids that cannot be synthesized by an organism and so must be provided as nutrients.

Accepted Answer

A) True 
 B)False

Question 9

Compare and contrast cyclic and noncyclic photophosphorylation.

Accepted Answer

Both cyclic photophosphorylation and non...

Question 10

As the concentration of substrate increases, the activity of the enzyme decreases.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is a by-product of the catabolism of proteins?

Accepted Answer

A)   lactic acid
B)   acetyl-CoA
C)   proteases
D)   ammonia
E)   carbon dioxideF) B) and D)
G) A) and B)

Question 12

During the synthesis of acetyl-CoA from pyruvic acid, ________ is produced.

Accepted Answer

A)   ATP
B)   NADH
C)   FADH₂
D)   H₂O
E)   acetic acidF) A) and B)
G) B) and D)

Question 13

Bacteriochlorophyll a absorbs ________ light.

Accepted Answer

A)   350 nm, ultraviolet
B)   425 nm, violet
C)   660 nm, red
D)   both 425 & 660 nm (violet and red) 
E)   all visibleF) A) and E)
G) C) and E) A

Question 14

When a cell forms an amino acid by adding an amine group derived from ammonia to a precursor metabolite, this process is called

Accepted Answer

A)   amination.
B)   transamination.
C)   reduction.
D)   polymerization.
E)   deamination.F) A) and E)
G) C) and E)

Question 15

The production of NADH takes place during the ________ stage(s)  of glycolysis.

Accepted Answer

A)   energy-conservation
B)   energy-investment
C)   lysis
D)   lysis and energy-investment
E)   energy-investment and energy-conservationF) A) and C)
G) B) and E)

Question 16

Laboratory fermentation tests often include a pH indicator because many bacteria produce (O₂/bases/acids) as they ferment carbohydrates.

Accepted Answer

The answer of Laboratory fermentation tests often include a pH...

Question 17

Electrons are transferred in the Krebs cycle in the form of (oxygen/hydrogen) atoms to NAD+ and FAD.

Accepted Answer

The answer of Electrons are transferred in the Krebs cycle...

Question 18

Where is the majority of ATP generated in prokaryotic cells?

Accepted Answer

A)   in the cytoplasmic membrane
B)   in the cytosol
C)   in the thylakoids
D)   in the inner mitochondrial membrane
E)   on ribosomesF) B) and E)
G) None of the above

Question 19

During reactions catalyzed by oxidoreductases an electron donor is

Accepted Answer

A)   oxidized.
B)   reduced.
C)   synthesized.
D)   degraded.
E)   unaltered.F) A) and C)
G) A) and E)

Question 20

Which of the following statements concerning glycolysis is TRUE?

Accepted Answer

A)   The first step of glycolysis involves oxidative phosphorylation.
B)   The glycolytic pathway is cyclical.
C)   Glucose is activated by substrate-level phosphorylation.
D)   Ribulose 5-phosphate is an intermediate of glycolysis.
E)   Two NADH molecules are reduced during glycolysis.F) A) and B)
G) B) and E)

Exam 5: Microbial Metabolism

The amount of energy required for a reaction to occur is its activation energy.

Correct AnswerverifiedShow Answer

When a noncompetitive inhibitor molecule binds to a(n) (active/allosteric/substrate) site on an enzyme, the shape of the active site changes so that the substrate molecules can no longer bind.

Correct Answerverifiedallosteric

Hydrolases are generally involved in ________ reactions.

Correct AnswerverifiedShow Answer

Which of the following produces NADPH?

Correct AnswerverifiedShow Answer

How many ATP molecules can theoretically be produced from the NADH generated by the catabolism of a molecule of glucose during aerobic respiration?

Correct AnswerverifiedB

Some bacteria use (acetyl-CoA/DHAP/TMAO) as a final electron receptor, resulting in a detectable odor.

Correct AnswerverifiedShow Answer

Which of the following is the CORRECT sequence of stages in glycolysis?

Correct AnswerverifiedShow Answer

Essential amino acids are amino acids that cannot be synthesized by an organism and so must be provided as nutrients.

Correct AnswerverifiedShow Answer

Compare and contrast cyclic and noncyclic photophosphorylation.

Correct AnswerverifiedBoth cyclic photophosphorylation and non...View AnswerShow Answer

As the concentration of substrate increases, the activity of the enzyme decreases.

Correct AnswerverifiedShow Answer

Which of the following is a by-product of the catabolism of proteins?

Correct AnswerverifiedShow Answer

During the synthesis of acetyl-CoA from pyruvic acid, ________ is produced.

Correct AnswerverifiedShow Answer

Bacteriochlorophyll a absorbs ________ light.

Correct AnswerverifiedA

When a cell forms an amino acid by adding an amine group derived from ammonia to a precursor metabolite, this process is called

Correct AnswerverifiedShow Answer

The production of NADH takes place during the ________ stage(s) of glycolysis.

Correct AnswerverifiedShow Answer

Laboratory fermentation tests often include a pH indicator because many bacteria produce (O₂/bases/acids) as they ferment carbohydrates.

Correct AnswerverifiedShow Answer

Electrons are transferred in the Krebs cycle in the form of (oxygen/hydrogen) atoms to NAD+ and FAD.

Correct AnswerverifiedShow Answer

Where is the majority of ATP generated in prokaryotic cells?

Correct AnswerverifiedShow Answer

During reactions catalyzed by oxidoreductases an electron donor is

Correct AnswerverifiedShow Answer

Which of the following statements concerning glycolysis is TRUE?

Correct AnswerverifiedShow Answer

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allosteric

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B

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Both cyclic photophosphorylation and non...
View Answer

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A

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