Question 1

Which of the following is a fermentation product useful in the manufacture of cheese?

Accepted Answer

A)  acetic acid 
B)  ammonia 
C)  ethanol 
D)  lactic acid 
E)  pyruvic acid 
A)  acetic acid 
B)  ammonia 
C)  ethanol 
D)  lactic acid 
E)  pyruvic acid

Question 2

The electron transport chain provides the energy for

Accepted Answer

A)  oxidative phosphorylation. 
B)  substrate-level phosphorylation. 
C)  beta-oxidation. 
D)  photophosphorylation. 
E)  anabolic reactions. 
A)  oxidative phosphorylation. 
B)  substrate-level phosphorylation. 
C)  beta-oxidation. 
D)  photophosphorylation. 
E)  anabolic reactions.

Question 3

Beta-oxidation of fatty acids produces a substrate of the

Accepted Answer

A)  pentose phosphate pathway. 
B)  protein synthesis pathways. 
C)  Embden-Meyerhof pathway. 
D)  Krebs cycle. 
E)  Calvin-Benson cycle. 
A)  pentose phosphate pathway. 
B)  protein synthesis pathways. 
C)  Embden-Meyerhof pathway. 
D)  Krebs cycle. 
E)  Calvin-Benson cycle.

Question 4

The (activation /inhibition/saturation) point of an enzyme is reached when all active sites have bound substrate molecules.

Accepted Answer

The answer of The (activation /inhibition/saturation) point of an enzyme...

Question 5

Reactions involving ligases are typically ________ reactions.

Accepted Answer

A)  anabolic 
B)  catabolic 
C)  both anabolic and catabolic 
D)  neither anabolic nor catabolic 
E)  exergonic 
A)  anabolic 
B)  catabolic 
C)  both anabolic and catabolic 
D)  neither anabolic nor catabolic 
E)  exergonic

Question 6

All of the following are forms of oxidation EXCEPT

Accepted Answer

A)  loss of an electron. 
B)  loss of hydrogen atom. 
C)  a dehydrogenation event. 
D)  substrate-level phosphorylation. 
E)  gain of an oxygen atom and its electrons. 
A)  loss of an electron. 
B)  loss of hydrogen atom. 
C)  a dehydrogenation event. 
D)  substrate-level phosphorylation. 
E)  gain of an oxygen atom and its electrons.

Question 7

Which of the following is a non-protein carrier found in some electron transport chains?

Accepted Answer

A)  flavoproteins 
B)  metal-containing proteins 
C)  ribozymes 
D)  cytochromes 
E)  ubiquinones 
A)  flavoproteins 
B)  metal-containing proteins 
C)  ribozymes 
D)  cytochromes 
E)  ubiquinones

Question 8

Which of the following statements concerning enzymes is FALSE?

Accepted Answer

A)  They are usually, but not always, proteins. 
B)  They always function best at 37°C. 
C)  They can be denatured if the pH of their environment is too high or too low. 
D)  They form a temporary intermediate compound with a substrate. 
E)  They can be used to catalyze a chemical reaction over and over again. 
A)  They are usually, but not always, proteins. 
B)  They always function best at 37°C. 
C)  They can be denatured if the pH of their environment is too high or too low. 
D)  They form a temporary intermediate compound with a substrate. 
E)  They can be used to catalyze a chemical reaction over and over again.

Question 9

The discussion of carbohydrate catabolism includes some of the many metabolic variations microbes are capable of. Devise a set of biochemical tests to identify the Gram-negative bacteria mentioned. Assume you can detect various organic compounds. Prepare a dichotomous key of your identification scheme.

Accepted Answer

Many answers are possible.Figure 5.3 sho

Question 10

Which of the following is an active enzyme?

Accepted Answer

A)  apoenzyme 
B)  cofactor 
C)  coenzyme 
D)  holoenzyme 
E)  subtrate 
A)  apoenzyme 
B)  cofactor 
C)  coenzyme 
D)  holoenzyme 
E)  subtrate

Question 11

The metabolic processes called fermentation

Accepted Answer

A)  produce substrates for the Krebs cycle. 
B)  are alternatives for the pentose phosphate pathway. 
C)  use an organic molecule as a final electron acceptor. 
D)  occur only when oxygen is readily available. 
E)  produce substrates for glycolysis. 
A)  produce substrates for the Krebs cycle. 
B)  are alternatives for the pentose phosphate pathway. 
C)  use an organic molecule as a final electron acceptor. 
D)  occur only when oxygen is readily available. 
E)  produce substrates for glycolysis.

Question 12

Anabolic reactions may be characterized as

Accepted Answer

A)  exergonic. 
B)  breaking large molecules into smaller molecules. 
C)  forming large molecules from smaller molecules. 
D)  producing ATP. 
E)  breaking large molecules into smaller molecules to produce ATP. 
A)  exergonic. 
B)  breaking large molecules into smaller molecules. 
C)  forming large molecules from smaller molecules. 
D)  producing ATP. 
E)  breaking large molecules into smaller molecules to produce ATP.

Question 13

Sulfanilamide is an antimicrobial drug that mimics the shape of an important substrate for a particular bacterial enzyme, thereby inhibiting the enzyme. This type of inhibition is known as

Accepted Answer

A)  allosteric inhibition. 
B)  competitive inhibition. 
C)  allosteric activation. 
D)  noncompetitive inhibition. 
E)  feedback inhibition. 
A)  allosteric inhibition. 
B)  competitive inhibition. 
C)  allosteric activation. 
D)  noncompetitive inhibition. 
E)  feedback inhibition.

Question 14

The conversion of phosphoenol pyruvic acid (PEP) to pyruvic acid results in the production of an ATP. This reaction is an example of (substrate-level/oxidative/reductive) phosphorylation.

Accepted Answer

The answer of The conversion of phosphoenol pyruvic acid (PEP)...

Question 15

Glyceraldehyde 3-phosphate is an intermediate in the Calvin-Benson cycle.

Accepted Answer

A) True 
 B)False

Question 16

Describe the mechanism of feedback inhibition and the role this process plays in controlling enzyme activity.

Accepted Answer

Feedback inhibition is also known as neg

Question 17

Anoxygenic photosynthesis typically results in the production of (oxygen/sulfur/ammonia) as a waste product.

Accepted Answer

The answer of Anoxygenic photosynthesis typically results in the production...

Question 18

The energy captured by photophosphorylation is used to produce glucose

Accepted Answer

A)  through the Calvin-Benson cycle. 
B)  through the Krebs cycle. 
C)  by cyclic phosphorylation. 
D)  through the pentose-phosphate pathway. 
E)  by beta-oxidation. 
A)  through the Calvin-Benson cycle. 
B)  through the Krebs cycle. 
C)  by cyclic phosphorylation. 
D)  through the pentose-phosphate pathway. 
E)  by beta-oxidation.

Question 19

Which of the following metabolic processes is commonly used to identify bacteria?

Accepted Answer

A)  carbohydrate fermentation 
B)  lipid catabolism 
C)  Krebs cycle products 
D)  lipid synthesis 
E)  pentose phosphate pathway products 
A)  carbohydrate fermentation 
B)  lipid catabolism 
C)  Krebs cycle products 
D)  lipid synthesis 
E)  pentose phosphate pathway products

Question 20

Although glycolysis requires an input of ATP, this pathway results in a net gain of two ATP; therefore it is a(n) ________ pathway.

Accepted Answer

A)  exergonic 
B)  endergonic 
C)  oxidative 
D)  reductive 
E)  neither exergonic nor endergonic 
A)  exergonic 
B)  endergonic 
C)  oxidative 
D)  reductive 
E)  neither exergonic nor endergonic

Exam 5: Microbial Metabolism

Which of the following is a fermentation product useful in the manufacture of cheese?

The electron transport chain provides the energy for

Beta-oxidation of fatty acids produces a substrate of the

The (activation /inhibition/saturation) point of an enzyme is reached when all active sites have bound substrate molecules.

Reactions involving ligases are typically ________ reactions.

All of the following are forms of oxidation EXCEPT

Which of the following is a non-protein carrier found in some electron transport chains?

Which of the following statements concerning enzymes is FALSE?

Which of the following is an active enzyme?

The metabolic processes called fermentation

Anabolic reactions may be characterized as

Sulfanilamide is an antimicrobial drug that mimics the shape of an important substrate for a particular bacterial enzyme, thereby inhibiting the enzyme. This type of inhibition is known as

The conversion of phosphoenol pyruvic acid (PEP) to pyruvic acid results in the production of an ATP. This reaction is an example of (substrate-level/oxidative/reductive) phosphorylation.

Glyceraldehyde 3-phosphate is an intermediate in the Calvin-Benson cycle.

Describe the mechanism of feedback inhibition and the role this process plays in controlling enzyme activity.

Anoxygenic photosynthesis typically results in the production of (oxygen/sulfur/ammonia) as a waste product.

The energy captured by photophosphorylation is used to produce glucose

Which of the following metabolic processes is commonly used to identify bacteria?

Although glycolysis requires an input of ATP, this pathway results in a net gain of two ATP; therefore it is a(n) ________ pathway.

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

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Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

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Immunization and Immune Testing

Immune Disorders

Microbial Diseases of the Skin and Wounds

Microbial Diseases of the Nervous System and Eyes

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Microbial Diseases of the Urinary and Reproductive Systems

Applied and Industrial Microbiology

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