Question 1

The majority of reduced NAD is produced in

Accepted Answer

A)  glycolysis.
B)  Krebs cycle.
C)  the electron transport chain.
D)  photosynthesis.E) C) and D)
F) A) and B)

Question 2

All aerobic bacterial species have identical electron acceptors in their electron transport systems.

Accepted Answer

A) True 
 B)False

Question 3

When enzyme action stops due to a buildup of end product, this control is called

Accepted Answer

A)  competitive inhibition.
B)  enzyme induction.
C)  enzyme repression.
D)  feedback inhibition.E) None of the above
F) A) and D)

Question 4

Feedback inhibition is best described as

Accepted Answer

A)  substrate binding to DNA, blocking enzyme transcription.
B)  product binding to DNA, blocking enzyme transcription.
C)  substrate binding to enzyme in noncompetitive site.
D)  product binding to enzyme in noncompetitive site.E) All of the above
F) B) and C)

Question 5

The energy released by _________ reactions is used to regenerate _______ which can then provide energy for __________ reactions.

Accepted Answer

A)  anabolic, ATP, catabolic
B)  anabolic, NADH, catabolic
C)  catabolic, ATP, anabolic
D)  catabolic, glucose, anabolicE) A) and D)
F) B) and C)

Question 6

Which of the following are characteristics of the Calvin cycle?

Accepted Answer

A)  The Calvin cycle requires light.
B)  Nitrogen is fixed into an organic form during the Calvin cycle.
C)  The Calvin cycle produces glucose as an end product.
D)  The Calvin cycle produces carbon dioxide and water.
E)  All of these choices are correct.F) C) and D)
G) A) and C)

Question 7

In most instances, anabolic pathways are nearly the exact reverse of catbolic pathways.

Accepted Answer

A) True 
 B)False

Question 8

Ribozymes are

Accepted Answer

A)  ribosomes which catalyze reactions.
B)  unique to prokaryotes.
C)  unique to eukaryotes.
D)  catalysts for RNA editing.
E)  catalysts for DNA splicing.F) A) and B)
G) B) and C)

Question 9

Each FADH2 from the Krebs cycle enters the electron transport system and gives rise to _____ ATPs.

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) C) and D)
G) B) and E)

Question 10

In which pathway is the most NADH generated?

Accepted Answer

A)  electron transport system
B)  Krebs cycle
C)  glycolysis
D)  alcoholic fermentation
E)  mixed acid fermentationF) A) and D)
G) A) and C)

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) A) and D)
G) A) and C)

Question 12

Substrate-level phosphorylation occurs in

Accepted Answer

A)  glycolysis and electron transport chain.
B)  photosynthesis and glycolysis.
C)  glycolysis and Krebs cycle.
D)  Krebs cycle and electron transport chain.
E)  All of these choices are correct.F) None of the above
G) C) and D)

Question 13

ATP synthase is a complex enzyme needed for oxidative phosphorylation.

Accepted Answer

A) True 
 B)False

Question 14

The process in which organisms integrate catabolic and anabolic pathways to improve cell efficiency is called

Accepted Answer

A)  metabolism.
B)  amphibolism.
C)  anabolism.
D)  catabolism.
E)  biosynthesis.F) A) and D)
G) A) and C)

Question 15

_____ reactions are anabolic reactions involving ligases for synthesis and the release of one water molecule for each bond formed.

Accepted Answer

A)  Reduction
B)  Condensation
C)  Oxidation
D)  TransferE) None of the above
F) All of the above

Question 16

Fermentation

Accepted Answer

A)  requires an organic electron acceptor.
B)  requires oxygen.
C)  only occurs in aerobic organisms.
D)  is equivalent to aerobic respiration in ATP production.E) A) and B)
F) B) and C)

Question 17

Glycolysis

Accepted Answer

A)  uses 2 ATP, produces 2 ATP and requires oxygen.
B)  uses 2 ATP, produces 4 ATP and requires oxygen.
C)  uses 2 ATP, produces 4 ATP, does not require oxygen.
D)  uses 2 ATP, produces 2 ATP, does not require oxygen.E) B) and D)
F) B) and C)

Question 18

Reduction of nitrogen-oxygen ions and compounds by some bacteria is called

Accepted Answer

A)  aerobic respiration.
B)  denitrification.
C)  nitrification.
D)  fermentation.
E)  deamination.F) B) and C)
G) A) and B)

Question 19

Which term refers to all of the chemical reactions of the cell?

Accepted Answer

A)  catabolism
B)  redox reactions
C)  phosphorylation
D)  metabolism
E)  cellular respirationF) B) and D)
G) A) and E)

Question 20

Amination is the addition of a(n)  _____ group to a carbon skeleton.

Accepted Answer

A)  carboxyl
B)  amino
C)  phosphate
D)  hydroxylE) None of the above
F) All of the above

Exam 8: An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

In which pathway is the most NADH generated?

Correct AnswerverifiedShow Answer

The majority of reduced NAD is produced in

Correct AnswerverifiedShow Answer

Reduction of nitrogen-oxygen ions and compounds by some bacteria is called

Correct AnswerverifiedShow Answer

In most instances, anabolic pathways are nearly the exact reverse of catbolic pathways.

Correct AnswerverifiedShow Answer

When enzyme action stops due to a buildup of end product, this control is called

Correct AnswerverifiedShow Answer

Feedback inhibition is best described as

Correct AnswerverifiedShow Answer

Each FADH2 from the Krebs cycle enters the electron transport system and gives rise to _____ ATPs.

Correct AnswerverifiedShow Answer

The energy released by _________ reactions is used to regenerate _______ which can then provide energy for __________ reactions.

Correct AnswerverifiedShow Answer

The process in which organisms integrate catabolic and anabolic pathways to improve cell efficiency is called

Correct AnswerverifiedShow Answer

Fermentation

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

_____ reactions are anabolic reactions involving ligases for synthesis and the release of one water molecule for each bond formed.

Correct AnswerverifiedShow Answer

Ribozymes are

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Which of the following are characteristics of the Calvin cycle?

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Amination is the addition of a(n) _____ group to a carbon skeleton.

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Which term refers to all of the chemical reactions of the cell?

Correct AnswerverifiedShow Answer

All aerobic bacterial species have identical electron acceptors in their electron transport systems.

Correct AnswerverifiedShow Answer

ATP synthase is a complex enzyme needed for oxidative phosphorylation.

Correct AnswerverifiedShow Answer

Substrate-level phosphorylation occurs in

Correct AnswerverifiedShow Answer

Glycolysis

Correct AnswerverifiedShow Answer

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Each FADH₂ from the Krebs cycle enters the electron transport system and gives rise to _____ ATPs.

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The energy released by _____ reactions is used to regenerate _ which can then provide energy for ________ reactions.

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