Question 1

Exoenzymes from pathogens are called virulence factors.

Accepted Answer

A) True 
 B)False  True

Question 2

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

Question 3

Metabolic pathways that regenerate their starting molecule are called ______ pathways.

Accepted Answer

A)   linear
B)   bidirectional
C)   convergent
D)   cyclic
E)   divergentF) B) and D)
G) A) and B)

Question 4

When glucose is broken down by glycolysis during bacterial fermentation, what is the usual net production of ATP?

Accepted Answer

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

Question 5

The formation of citric acid from oxaloacetic acid and an acetyl group begins ______.

Accepted Answer

A)   glycolysis
B)   the electron transport system
C)   the Krebs cycle
D)   fermentation
E)   oxidative phosphorylationF) A) and E)
G) C) and E)

Question 6

The bacterial genus Bacillus can utilize starch as a nutrient by splitting the starch molecule into smaller molecules of glucose with the addition of water. The enzymes to do this would be classi?ed as ______.

Accepted Answer

A)   transferases
B)   oxidoreductases
C)   ligases
D)   hydrolases
E)   isomerasesF) B) and D)
G) A) and E)

Question 7

The most likely place where an exoenzyme participates in a chemical reaction is ______.

Accepted Answer

A)   in mitochondria
B)   within the cell membrane
C)   in lysosomes
D)   in cytoplasm
E)   outside of the cellF) B) and C)
G) A) and D)

Question 8

Each NADH that enters the electron transport system results in the production of _____ ATPs.

Accepted Answer

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

Question 9

Each FADH2 from the Krebs cycle that enters the electron transport system results in the production of _____ ATP(s) .

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) None of the above
G) B) and C) B

Question 10

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 NADF) A) and E)
G) A) and C)

Question 11

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 B)
G) A) and C)

Question 12

Most electron carriers are ______.

Accepted Answer

A)   coenzymes
B)   enzymes
C)   hydrogen
D)   inorganic phosphateE) A) and D)
F) A) and C)

Question 13

The term used to describe all of the chemical reactions within a cell is ______.

Accepted Answer

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

Question 14

All of the following are exoenzymes except ______.

Accepted Answer

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

Question 15

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 D)
G) None of the above

Question 16

ATP molecules are catalysts that lower the activation energy needed to initiate a reaction.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is not a photosynthetic pigment?

Accepted Answer

A)   Carotenoid
B)   Leukophyll
C)   Phycobilin
D)   ChlorophyllE) B) and C)
F) A) and D)

Question 18

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 photophosphorylationF) B) and E)
G) D) and E)

Question 19

Only yeast produce alcohol as a fermentation product.

Accepted Answer

A) True 
 B)False

Question 20

Sulfa drugs like Bactrim, given for bacterial infections, inhibit bacteria by blocking folic acid synthesis. The precursor molecule of folic acid is para-amino benzoic acid (PABA) . Interestingly, PABA has a structure very similar to a sulfa drug. If a sulfa drug is present, the bacterial enzyme will
Bind the sulfa drug because of structural similarity. This is an example of ______.

Accepted Answer

A)   enzyme induction
B)   enzyme repression
C)   noncompetitive inhibition
D)   competitive inhibition
E)   catabolite repressionF) D) and E)
G) B) and E) D

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

Exoenzymes from pathogens are called virulence factors.

Correct Answer
verified
True

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

Metabolic pathways that regenerate their starting molecule are called ______ pathways.

Correct Answer
verified

When glucose is broken down by glycolysis during bacterial fermentation, what is the usual net production of ATP?

Correct Answer
verified

The formation of citric acid from oxaloacetic acid and an acetyl group begins ______.

Correct Answer
verified

The bacterial genus Bacillus can utilize starch as a nutrient by splitting the starch molecule into smaller molecules of glucose with the addition of water. The enzymes to do this would be classi?ed as ______.

Correct Answer
verified

The most likely place where an exoenzyme participates in a chemical reaction is ______.

Correct Answer
verified

Each NADH that enters the electron transport system results in the production of _____ ATPs.

Correct Answer
verified

Each FADH2 from the Krebs cycle that enters the electron transport system results in the production of _____ ATP(s) .

Correct Answer
verified
B

All of the following pertain to glycolysis except _______.

Correct Answer
verified

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

Correct Answer
verified

Most electron carriers are ______.

Correct Answer
verified

The term used to describe all of the chemical reactions within a cell is ______.

Correct Answer
verified

All of the following are exoenzymes except ______.

Correct Answer
verified

An apoenzyme is ______.

Correct Answer
verified

ATP molecules are catalysts that lower the activation energy needed to initiate a reaction.

Correct Answer
verified

Which of the following is not a photosynthetic pigment?

Correct Answer
verified

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

Correct Answer
verified

Only yeast produce alcohol as a fermentation product.

Correct Answer
verified

Correct Answer
verified
D

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

Exoenzymes from pathogens are called virulence factors.

Correct AnswerverifiedTrue

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

Metabolic pathways that regenerate their starting molecule are called ______ pathways.

Correct AnswerverifiedShow Answer

When glucose is broken down by glycolysis during bacterial fermentation, what is the usual net production of ATP?

Correct AnswerverifiedShow Answer

The formation of citric acid from oxaloacetic acid and an acetyl group begins ______.

Correct AnswerverifiedShow Answer

The bacterial genus Bacillus can utilize starch as a nutrient by splitting the starch molecule into smaller molecules of glucose with the addition of water. The enzymes to do this would be classi?ed as ______.

Correct AnswerverifiedShow Answer

The most likely place where an exoenzyme participates in a chemical reaction is ______.

Correct AnswerverifiedShow Answer

Each NADH that enters the electron transport system results in the production of _____ ATPs.

Correct AnswerverifiedShow Answer

Each FADH2 from the Krebs cycle that enters the electron transport system results in the production of _____ ATP(s) .

Correct AnswerverifiedB

All of the following pertain to glycolysis except _______.

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

Most electron carriers are ______.

Correct AnswerverifiedShow Answer

The term used to describe all of the chemical reactions within a cell is ______.

Correct AnswerverifiedShow Answer

All of the following are exoenzymes except ______.

Correct AnswerverifiedShow Answer

An apoenzyme is ______.

Correct AnswerverifiedShow Answer

ATP molecules are catalysts that lower the activation energy needed to initiate a reaction.

Correct AnswerverifiedShow Answer

Which of the following is not a photosynthetic pigment?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Only yeast produce alcohol as a fermentation product.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedD

Correct Answer
verified
True

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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B

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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D