Question 1

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) D) and E)
G) A) and B)

Question 2

Hydrolysis reactions are catabolic reactions that use water to split the reactant into smaller subunits.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following are not photosynthetic pigments?

Accepted Answer

A)  carotenoids
B)  leukophylls
C)  phycobilins
D)  chlorophylls
E)  All of these choices are correct.F) C) and D)
G) A) and E)

Question 4

Which of the following is not true of anaerobic respiration? v: 05_22_2015_QC_CS-15256

Accepted Answer

A)  involves glycolysis
B)  generates some ATP
C)  utilizes an electron transport system
D)  uses the same final electron acceptors as aerobic respirationE) C) and D)
F) A) and B)

Question 5

Exergonic reactions

Accepted Answer

A)  include synthesis of large carbohydrates.
B)  only occur in heterotrophs.
C)  occur during aerobic cellular respiration.
D)  do not occur in anaerobic cellular respiration.
E)  occur when ADP binds to inorganic phosphate to form ATP.F) B) and D)
G) All of the above

Question 6

Which of the following is not involved in the step that occurs between glycolysis and the Krebs cycle?

Accepted Answer

A)  reduction of NAD
B)  decarboxylation of pyruvic acid
C)  Coenzyme A attaches to an acetyl group
D)  dehydrogenation of pyruvic acid
E)  pyruvic acid accepts electrons from NADHF) None of the above
G) A) and C)

Question 7

The best way to control a metabolic pathway is to control the fastest enzyme in the series.

Accepted Answer

A) True 
 B)False

Question 8

The cell's metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction.

Accepted Answer

A)  cofactors
B)  vitamins
C)  enzymes
D)  ATP
E)  CoenzymesF) A) and E)
G) A) and B)

Question 9

An oxidase detection test can be used to identify certain bacteria because they lack

Accepted Answer

A)  Cytochrome c oxidase.
B)  NAD.
C)  mitochondria.
D)  ATP synthase.
E)  Coenzyme Q.F) C) and D)
G) B) and E)

Question 10

Enzymes that are always present, regardless of the amount of substrate are

Accepted Answer

A)  apoenzymes.
B)  axoenzymes.
C)  constitutive enzymes.
D)  regulated enzymes.
E)  endoenzymes.F) B) and E)
G) B) and C)

Question 11

Only yeast produces alcohol as a fermentation product.

Accepted Answer

A) True 
 B)False

Question 12

FAD, NADP, and NAD are all _____ carriers.

Accepted Answer

A)  hydrogen
B)  electron
C)  ATP
D)  both hydrogen and electronE) A) and D)
F) A) and C)

Question 13

All of the following pertain to glycolysis EXCEPT

Accepted Answer

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

Question 14

In which stage of aerobic respiration is water produced?

Accepted Answer

A)  glycolysis
B)  Krebs cycle
C)  electron transport systemD) All of the above
E) A) and B)

Question 15

Most electron carriers are

Accepted Answer

A)  coenzymes.
B)  enzymes.
C)  hydrogens.
D)  inorganic phosphate.
E)  All of these choices are correct.F) None of the above
G) A) and E)

Question 16

Reactants are converted to products by

Accepted Answer

A)  enzymes releasing energy.
B)  breaking and forming bonds.
C)  enzymes binding to reactants.
D)  reactants releasing energy.E) A) and B)
F) All of the above

Question 17

As the electron transport carriers shuttle electrons, they actively pump _____ into the outer membrane compartment setting up a concentration gradient called the proton motive force.

Accepted Answer

A)  ATP
B)  phosphate
C)  hydrogen ions
D)  oxygen
E)  NADHF) B) and D)
G) A) and E)

Question 18

What chemical causes death in many eukaryotes because it blocks Cytochrome c oxidase?

Accepted Answer

A)  copper
B)  iron
C)  cyanide
D)  oxygen
E)  carbon monoxideF) C) and E)
G) B) and D)

Question 19

Enzymes that are only produced when substrate is present are termed

Accepted Answer

A)  exoenzymes.
B)  endoenzymes.
C)  constitutive enzymes.
D)  induced enzymes.
E)  conjugated enzymes.F) A) and C)
G) A) and E)

Question 20

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) D) and E)
G) A) and B)

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

Which of the following are not photosynthetic pigments?

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Exergonic reactions

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Only yeast produces alcohol as a fermentation product.

Correct AnswerverifiedShow Answer

Enzymes that are always present, regardless of the amount of substrate are

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Most electron carriers are

Correct AnswerverifiedShow Answer

All of the following pertain to glycolysis EXCEPT

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Enzymes that are only produced when substrate is present are termed

Correct AnswerverifiedShow Answer

What chemical causes death in many eukaryotes because it blocks Cytochrome c oxidase?

Correct AnswerverifiedShow Answer

Which of the following is not involved in the step that occurs between glycolysis and the Krebs cycle?

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As the electron transport carriers shuttle electrons, they actively pump _____ into the outer membrane compartment setting up a concentration gradient called the proton motive force.

Correct AnswerverifiedShow Answer

Hydrolysis reactions are catabolic reactions that use water to split the reactant into smaller subunits.

Correct AnswerverifiedShow Answer

Mixed acid fermentation

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In which stage of aerobic respiration is water produced?

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An oxidase detection test can be used to identify certain bacteria because they lack

Correct AnswerverifiedShow Answer

FAD, NADP, and NAD are all _____ carriers.

Correct AnswerverifiedShow Answer

The best way to control a metabolic pathway is to control the fastest enzyme in the series.

Correct AnswerverifiedShow Answer

Reactants are converted to products by

Correct AnswerverifiedShow Answer

The cell's metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction.

Correct AnswerverifiedShow Answer

Which of the following is not true of anaerobic respiration? v: 05_22_2015_QC_CS-15256

Correct AnswerverifiedShow Answer

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