Question 1

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

Accepted Answer

A)   Reduction of NAD+
B)   Coenzyme A attaches to an acetyl group
C)   Oxidation of pyruvic acid
D)   Pyruvic acid accepts electrons from NADHE) All of the above
F) None of the above

Question 2

In the cell, energy released by electrons is often used to phosphorylate ______.

Accepted Answer

A)   ATP
B)   ADP
C)   pyruvic acid
D)   oxygen
E)   NADF) B) and C)
G) A) and C)

Question 3

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 enzymesF) All of the above
G) C) and E)

Question 4

Cells generate ATP from the release of chemical energy from nutrients, whereas chlorophyll- containing organisms generate ATP via the light-dependent reactions of photosynthesis as well as from the oxidation of nutrients.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

The unknown bacterium that you are testing makes the enzyme phenyalanine deaminase, as indicated by the results of a phenylalanine test. This enzyme facilitates the removal of a/an ______ group from the organic compound so it can be converted into an intermediate compound for the krebs cycle.

Accepted Answer

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

Question 7

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)   is the same as anaerobic respirationF) C) and E)
G) A) and D)

Question 8

Oxidoreductase apoenzymes utilize a coenzyme to function. The NAD+ and FAD coenzymes _______.

Accepted Answer

A)   are reduced when they remove electrons from the substrate
B)   are reduced when they add electrons to the substrate
C)   carry only electrons between molecules
D)   are oxidized when they remove electrons from the substrateE) A) and C)
F) B) and C)

Question 9

When comparing fermentation and anaerobic respiration, which statement would be true?

Accepted Answer

A)   Fermentation and anaerobic respiration are the same.
B)   Fermentation produces carbon dioxide, whereas anaerobic respiration does not.
C)   Anaerobic respiration and fermentation both employ the electron transport system.
D)   Both anaerobic respiration and fermentation use phosphorylation to make ATP.E) A) and B)
F) All of the above

Question 10

The space between the cell membrane and the cell wall is important during aerobic respiration. Why?

Accepted Answer

A)   Hydrogen ions are transported out into the space to set up a hydrogen gradient.
B)   Cytochrome electron carriers are located in the space.
C)   Oxygen combines with electrons in that space to form water.
D)   Pyruvate is transported into the space to be converted into acetyl coenzyme A to enter the Krebs cycle.E) A) and B)
F) None of the above

Question 11

Building block molecules for biosynthetic pathways come from the cell's catabolic pathways and from the environment.

Accepted Answer

A) True 
 B)False

Question 12

Enzymes that catalyze the removal of a a functional group and its subsequent attachment to a new substrate are called ______.

Accepted Answer

A)   transferases
B)   oxidoreductases
C)   isomerases
D)   lyases
E)   ligasesF) A) and B)
G) A) and E)

Question 13

The property of organisms to integrate catabolic and anabolic pathways to improve cell eﬃciency is called ______.

Accepted Answer

A)   metabolism
B)   amphibolism
C)   anabolism
D)   catabolism
E)   biosynthesisF) A) and E)
G) C) and E)

Question 14

Glyceraldehyde-3-phosphate is an intermediary of glycolysis that can also be utilized in biosynthetic pathways.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A)   glycolysis
B)   amphibolism
C)   phosphorylation
D)   amination
E)   gluconeogenesisF) A) and B)
G) All of the above

Question 16

Each of the following are denaturing agents except ______.

Accepted Answer

A)   high temperature
B)   low temperature
C)   high pH
D)   low pHE) A) and B)
F) A) and C)

Question 17

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) B) and D)
F) B) and C)

Question 18

FAD, NADP, NAD, and coenzyme A are all carriers of ________.

Accepted Answer

A)   hydrogens
B)   electrons
C)   ATP
D)   Both hydrogens and electrons are correct.E) B) and C)
F) A) and B)

Question 19

The principle sites of amphibolic interaction occur during ______.

Accepted Answer

A)   glycolysis and photosynthesis
B)   the Krebs cycle and the electron transport system
C)   glycolysis and the Krebs cycle
D)   fermentation and the Krebs cycle
E)   fermentation and glycolysisF) B) and E)
G) All of the above

Question 20

Enzymes that function inside a cell are ______.

Accepted Answer

A)   apoenzymes
B)   exoenzymes
C)   constitutive enzymes
D)   regulated enzymes
E)   endoenzymesF) A) and B)
G) A) and C)

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

The space between the cell membrane and the cell wall is important during aerobic respiration. Why?

Correct AnswerverifiedShow Answer

Enzymes that catalyze the removal of a a functional group and its subsequent attachment to a new substrate are called ______.

Correct AnswerverifiedShow Answer

Oxidoreductase apoenzymes utilize a coenzyme to function. The NAD+ and FAD coenzymes _______.

Correct AnswerverifiedShow Answer

Enzymes that function inside a cell are ______.

Correct AnswerverifiedShow Answer

The unknown bacterium that you are testing makes the enzyme phenyalanine deaminase, as indicated by the results of a phenylalanine test. This enzyme facilitates the removal of a/an ______ group from the organic compound so it can be converted into an intermediate compound for the krebs cycle.

Correct AnswerverifiedShow Answer

Glyceraldehyde-3-phosphate is an intermediary of glycolysis that can also be utilized in biosynthetic pathways.

Correct AnswerverifiedShow Answer

Fermentation ______.

Correct AnswerverifiedShow Answer

Building block molecules for biosynthetic pathways come from the cell's catabolic pathways and from the environment.

Correct AnswerverifiedShow Answer

When comparing fermentation and anaerobic respiration, which statement would be true?

Correct AnswerverifiedShow Answer

In the cell, energy released by electrons is often used to phosphorylate ______.

Correct AnswerverifiedShow Answer

The property of organisms to integrate catabolic and anabolic pathways to improve cell eﬃciency is called ______.

Correct AnswerverifiedShow Answer

FAD, NADP, NAD, and coenzyme A are all carriers of ________.

Correct AnswerverifiedShow Answer

The principle sites of amphibolic interaction occur during ______.

Correct AnswerverifiedShow Answer

Which of the following is not true of anaerobic respiration?

Correct AnswerverifiedShow Answer

Enzymes that are only produced when substrate is present are termed ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cells generate ATP from the release of chemical energy from nutrients, whereas chlorophyll- containing organisms generate ATP via the light-dependent reactions of photosynthesis as well as from the oxidation of nutrients.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Each of the following are denaturing agents except ______.

Correct AnswerverifiedShow Answer

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