Question 1

Your bacterium is growing on a type of medium called casein agar, which contains milk protein (casein) .There is a clear zone around the growth area of the bacterium, showing that it is synthesizing the enzymes needed to catalyze the breakdown of casein.These enzymes are considered ______.

Accepted Answer

A)  apoenzymes
B)  exoenzymes
C)  ribozymes
D)  endoenzymesE) C) and D)
F) A) and C)

Question 2

The process of forming glucose from various metabolic intermediates is called ______.

Accepted Answer

A)  glycolysis
B)  amphibolism
C)  phosphorylation
D)  amination
E)  gluconeogenesisF) C) and E)
G) None of the above

Question 3

In bacterial cells, when glucose is completely oxidized by all the pathways of aerobic cellular respiration, what is the maximum number of ATP generated?

Accepted Answer

A)  2
B)  3
C)  24
D)  36
E)  38F) B) and E)
G) A) and E)

Question 4

All of the following pertain to glycolysis except

Accepted Answer

A)  it occurs without oxygen.
B)  it ends with formation of pyruvic acid.
C)  it occurs during fermentation.
D)  it degrades glucose to CO2 and H2O.
E)  it involves reduction of NAD.F) A) and B)
G) A) and C) D

Question 5

Mixed acid fermentation

Accepted Answer

A)  produces butyric acid.
B)  occurs in all bacteria.
C)  produces several different acids plus CO2 and H2 gases.
D)  is seen in Streptococcus and Lactobacillus.
E)  also produces ethanol.F) B) and C)
G) A) and D)

Question 6

The step involving ATP, hexokinase, and the phosphorylation of glucose to glucose-6-phosphate is

Accepted Answer

A)  the final step of the Krebs cycle.
B)  the first redox reaction of the electron transport system.
C)  an example of oxidative phosphorylation.
D)  an example of substrate-level phosphorylation.
E)  an example of photophosphorylation.F) None of the above
G) A) and D)

Question 7

In which pathway is the most NADH generated?

Accepted Answer

A)  The electron transport system
B)  The Krebs cycle
C)  Glycolysis
D)  Alcoholic fermentation
E)  Mixed acid fermentationF) C) and D)
G) A) and E)

Question 8

Which of the following is not true of anaerobic respiration?

Accepted Answer

A)  It involves glycolysis.
B)  It generates some ATP.
C)  It utilizes an electron transport system.
D)  It uses the same final electron acceptor as aerobic respiration.E) A) and D)
F) All of the above

Question 9

One turn of the Calvin cycle fixes a molecule of CO2 gas and is driven by 3 molecules of ATP and 2 molecules of NADPH from the light reactions.Which of the following is true?

Accepted Answer

A)  It takes 3 turns of the cycle, 9 molecules of ATP, and 6 molecules of NADPH to make one molecule of glucose.
B)  It takes 6 turns of the cycle, 18 molecules of ATP, and 12 molecules of NADPH to make a glucose molecule.
C)  The cycle must be carried out in the dark.
D)  The cycle is exergonic.E) A) and B)
F) A) and C)

Question 10

An apoenzyme is ______.

Accepted Answer

A)  part of a simple enzyme
B)  also called a coenzyme
C)  the protein part of a holoenzyme
D)  often an inorganic metal ion
E)  an RNA moleculeF) B) and E)
G) B) and D)

Question 11

In addition to electrons, which of the following is also involved in electron transfer?

Accepted Answer

A)  ADP
B)  Glucose
C)  Carbon
D)  Hydrogen
E)  Carbon dioxideF) All of the above
G) A) and E)

Question 12

What process is described here? A concentration gradient of H+ ions is created in the periplasmic space by actively transporting the ions across the membrane using the energy liberated when carrier molecules are oxidized.When the H+ ions pass through ATPase, enough energy is generated to add phosphate groups onto ADP molecules.

Accepted Answer

A)  Fermentation
B)  The Calvin cycle
C)  Substrate-level phosphorylation
D)  Oxidative phosphorylation
E)  DeaminationF) None of the above
G) A) and C)

Question 13

Photosynthesis occurs in chloroplasts of prokaryotes.

Accepted Answer

A) True 
 B)False

Question 14

How many carbon dioxide molecules are produced by the complete aerobic breakdown of one glucose molecule?

Accepted Answer

A)  2
B)  3
C)  4
D)  5
E)  6F) None of the above
G) D) and E) E

Question 15

Noncompetitive inhibition is best described as

Accepted Answer

A)  the substrate binding to DNA, blocking enzyme transcription.
B)  the end product binding to DNA, blocking enzyme transcription.
C)  the substrate binding to enzyme in a regulatory site.
D)  the end product binding to enzyme in noncompetitive site.E ) an anabolic reaction.E) None of the above
F) C) and D) D

Question 16

Exoenzymes from pathogens are called virulence factors.

Accepted Answer

A) True 
 B)False

Question 17

All of the following are exoenzymes except ______.

Accepted Answer

A)  ATP synthase
B)  streptokinase
C)  penicillinase
D)  collagenaseE) None of the above
F) All of the above

Question 18

Which of the following is not a process that regenerates ATP?

Accepted Answer

A)  Oxidative phosphorylation
B)  Reductive phosphorylation
C)  Substrate-level phosphorylation
D)  PhotophosphorylationE) C) and D)
F) B) and D)

Question 19

Recently discovered bacteria that inhabit the ocean floor undergo photosynthesis using light from chemical reactions, the breaking of mineral crystals, or from bubble formation.

Accepted Answer

A) True 
 B)False

Question 20

Each of the following are electron carriers except ______.

Accepted Answer

A)  NAD
B)  FAD
C)  NADP
D)  FADPE) None of the above
F) A) and D)

Exam 8: Microbial Metabolism: The Chemical Crossroads of Life

Your bacterium is growing on a type of medium called casein agar, which contains milk protein (casein) .There is a clear zone around the growth area of the bacterium, showing that it is synthesizing the enzymes needed to catalyze the breakdown of casein.These enzymes are considered ______.

Correct Answer
verified

The process of forming glucose from various metabolic intermediates is called ______.

Correct Answer
verified

In bacterial cells, when glucose is completely oxidized by all the pathways of aerobic cellular respiration, what is the maximum number of ATP generated?

Correct Answer
verified

All of the following pertain to glycolysis except

Correct Answer
verified
D

Mixed acid fermentation

Correct Answer
verified

The step involving ATP, hexokinase, and the phosphorylation of glucose to glucose-6-phosphate is

Correct Answer
verified

In which pathway is the most NADH generated?

Correct Answer
verified

Which of the following is not true of anaerobic respiration?

Correct Answer
verified

One turn of the Calvin cycle fixes a molecule of CO₂ gas and is driven by 3 molecules of ATP and 2 molecules of NADPH from the light reactions.Which of the following is true?

Correct Answer
verified

An apoenzyme is ______.

Correct Answer
verified

In addition to electrons, which of the following is also involved in electron transfer?

Correct Answer
verified

Correct Answer
verified

Photosynthesis occurs in chloroplasts of prokaryotes.

Correct Answer
verified

How many carbon dioxide molecules are produced by the complete aerobic breakdown of one glucose molecule?

Correct Answer
verified
E

Noncompetitive inhibition is best described as

Correct Answer
verified
D

Exoenzymes from pathogens are called virulence factors.

Correct Answer
verified

All of the following are exoenzymes except ______.

Correct Answer
verified

Which of the following is not a process that regenerates ATP?

Correct Answer
verified

Recently discovered bacteria that inhabit the ocean floor undergo photosynthesis using light from chemical reactions, the breaking of mineral crystals, or from bubble formation.

Correct Answer
verified

Each of the following are electron carriers except ______.

Correct Answer
verified

Exam 8: Microbial Metabolism: The Chemical Crossroads of Life

Your bacterium is growing on a type of medium called casein agar, which contains milk protein (casein) .There is a clear zone around the growth area of the bacterium, showing that it is synthesizing the enzymes needed to catalyze the breakdown of casein.These enzymes are considered ______.

Correct AnswerverifiedShow Answer

The process of forming glucose from various metabolic intermediates is called ______.

Correct AnswerverifiedShow Answer

In bacterial cells, when glucose is completely oxidized by all the pathways of aerobic cellular respiration, what is the maximum number of ATP generated?

Correct AnswerverifiedShow Answer

All of the following pertain to glycolysis except

Correct AnswerverifiedD

Mixed acid fermentation

Correct AnswerverifiedShow Answer

The step involving ATP, hexokinase, and the phosphorylation of glucose to glucose-6-phosphate is

Correct AnswerverifiedShow Answer

In which pathway is the most NADH generated?

Correct AnswerverifiedShow Answer

Which of the following is not true of anaerobic respiration?

Correct AnswerverifiedShow Answer

One turn of the Calvin cycle fixes a molecule of CO2 gas and is driven by 3 molecules of ATP and 2 molecules of NADPH from the light reactions.Which of the following is true?

Correct AnswerverifiedShow Answer

An apoenzyme is ______.

Correct AnswerverifiedShow Answer

In addition to electrons, which of the following is also involved in electron transfer?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Photosynthesis occurs in chloroplasts of prokaryotes.

Correct AnswerverifiedShow Answer

How many carbon dioxide molecules are produced by the complete aerobic breakdown of one glucose molecule?

Correct AnswerverifiedE

Noncompetitive inhibition is best described as

Correct AnswerverifiedD

Exoenzymes from pathogens are called virulence factors.

Correct AnswerverifiedShow Answer

All of the following are exoenzymes except ______.

Correct AnswerverifiedShow Answer

Which of the following is not a process that regenerates ATP?

Correct AnswerverifiedShow Answer

Recently discovered bacteria that inhabit the ocean floor undergo photosynthesis using light from chemical reactions, the breaking of mineral crystals, or from bubble formation.

Correct AnswerverifiedShow Answer

Each of the following are electron carriers except ______.

Correct AnswerverifiedShow Answer

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D

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One turn of the Calvin cycle fixes a molecule of CO₂ gas and is driven by 3 molecules of ATP and 2 molecules of NADPH from the light reactions.Which of the following is true?

Correct Answer
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Correct Answer
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E

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D

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