Question 1

The redox carriers of the electron transport system that have a tightly bound metal atom responsible for accepting and donating electrons are

Accepted Answer

A)  NAD
B)  FAD
C)  NADP
D)  the cytochromes.
E)  the flavoproteins.F) None of the above
G) A) and B)

Question 2

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) B) and D)
G) C) and D)

Question 3

All organisms that are photosynthetic are oxygenic.

Accepted Answer

A) True 
 B)False

Question 4

Formation of peptide bonds between amino acids to build a polypeptide would be called

Accepted Answer

A)  anabolism.
B)  phosphorylation.
C)  fermentation.
D)  catabolism.
E)  glycolysis.F) A) and C)
G) None of the above

Question 5

The process of forming glucose from various metabolic intermediates is called

Accepted Answer

A)  glycolysis.
B)  amphibolism.
C)  phosphorylation.
D)  amination.
E)  gluconeogenesis.F) C) and E)
G) A) and E) E

Question 6

Most electron carriers are

Accepted Answer

A)  coenzymes.
B)  enzymes.
C)  hydrogen.
D)  inorganic phosphate.E) All of the above
F) None of the above

Question 7

Ribozymes are

Accepted Answer

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

Question 8

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)  ligases.F) D) and E)
G) B) and C)

Question 9

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 molecule.F) A) and B)
G) D) and E)

Question 10

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

Accepted Answer

A)  ATP.
B)  ADP.
C)  pyruvic acid.
D)  oxygen.
E)  NAD.F) C) and D)
G) A) and B)

Question 11

Metabolic pathways that regenerate their starting point are called _____ pathways.

Accepted Answer

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

Question 12

You have a tube of nutrient broth,in which

Accepted Answer

A)  fermentation
B)  aerobic respiration
C)  anaerobic respiration
D)  photosynthesis
E)  coli is growing.Upon analyzing the broth chemistry,you find:· oxygen content has dropped a bit,but carbon dioxide has gone up a lot· formic,acetic,and lactic acids are presentWhat kind of metabolism has most likely occurred?F) B) and D)
G) A) and C)

Question 13

Which of the following is not true of the light-dependent reactions of photosynthesis?

Accepted Answer

A)  occurs in thylakoid membranes
B)  generates NADPH
C)  generates glucose from CO2 and H2O
D)  photons cause magnesium to release electrons
E)  ATP is generated by a chemiosmotic mechanismF) C) and D)
G) A) and B)

Question 14

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 glycolysis.F) B) and C)
G) C) and D)

Question 15

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) A) and B)
F) A) and C)

Question 16

Which of the following is not true of anaerobic respiration?

Accepted Answer

A)  is also called fermentation
B)  involves glycolysis
C)  generates some ATP
D)  utilizes an electron transport system
E)  uses the same final electron acceptors as aerobic respirationF) A) and C)
G) C) and E)

Question 17

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,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 D)
F) None of the above D

Question 18

Each of the following are denaturing agents except

Accepted Answer

A)  high temperature.
B)  low temperature.
C)  high pH.
D)  low pH.E) All of the above
F) None of the above

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Below is a metabolic pathway having 3 chemical reactions and 3 enzymes.Enzyme 1 has 2 binding sites--1 for the substrate A and another for the end product D.As the pathway proceeds,the end product in higher quantities will react with enzyme 1,blocking the enzyme's binding to the substrate.Which statement is true about this pathway? enz1 enz2 enz3
Substrate A --> B --> C --> D end product

Accepted Answer

A)  This is a case of noncompetitive inhibition.
B)  As a result of the inhibition of the enzyme,there will eventually be less substrate converted to the end product D and this pathway will shut down.
C)  Enzyme 1 has 2 binding sites.
D)  All of the statements are true.E) B) and C)
F) A) and B) D

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

The redox carriers of the electron transport system that have a tightly bound metal atom responsible for accepting and donating electrons are

Correct Answer
verified

All of the following pertain to glycolysis except

Correct Answer
verified

All organisms that are photosynthetic are oxygenic.

Correct Answer
verified

Formation of peptide bonds between amino acids to build a polypeptide would be called

Correct Answer
verified

The process of forming glucose from various metabolic intermediates is called

Correct Answer
verified
E

Most electron carriers are

Correct Answer
verified

Ribozymes are

Correct Answer
verified

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

Correct Answer
verified

An apoenzyme is

Correct Answer
verified

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

Correct Answer
verified

Metabolic pathways that regenerate their starting point are called _____ pathways.

Correct Answer
verified

You have a tube of nutrient broth,in which

Correct Answer
verified

Which of the following is not true of the light-dependent reactions of photosynthesis?

Correct Answer
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The principle sites of amphibolic interaction occur during

Correct Answer
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FAD,NADP,NAD,and coenzyme A are all carriers of:

Correct Answer
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Which of the following is not true of anaerobic respiration?

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

Correct Answer
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D

Each of the following are denaturing agents except

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

Correct Answer
verified

Correct Answer
verified
D

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

The redox carriers of the electron transport system that have a tightly bound metal atom responsible for accepting and donating electrons are

Correct AnswerverifiedShow Answer

All of the following pertain to glycolysis except

Correct AnswerverifiedShow Answer

All organisms that are photosynthetic are oxygenic.

Correct AnswerverifiedShow Answer

Formation of peptide bonds between amino acids to build a polypeptide would be called

Correct AnswerverifiedShow Answer

The process of forming glucose from various metabolic intermediates is called

Correct AnswerverifiedE

Most electron carriers are

Correct AnswerverifiedShow Answer

Ribozymes are

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

An apoenzyme is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Metabolic pathways that regenerate their starting point are called _____ pathways.

Correct AnswerverifiedShow Answer

You have a tube of nutrient broth,in which

Correct AnswerverifiedShow Answer

Which of the following is not true of the light-dependent reactions of photosynthesis?

Correct AnswerverifiedShow Answer

The principle sites of amphibolic interaction occur during

Correct AnswerverifiedShow Answer

FAD,NADP,NAD,and coenzyme A are all carriers of:

Correct AnswerverifiedShow Answer

Which of the following is not true of anaerobic respiration?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

Each of the following are denaturing agents except

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedD

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E

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D

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D