Question 1

Microbes can utilize only carbohydrates for energy production.

Accepted Answer

A) True 
 B)False

Question 2

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 ATPF) A) and D)
G) C) and E)

Question 3

ATP synthase is a complex enzyme needed for oxidative phosphorylation.

Accepted Answer

A) True 
 B)False

Question 4

Reduction of nitrogen-oxygen ions and compounds by some bacteria is called ______.

Accepted Answer

A)   aerobic respiration
B)   denitriﬁcation
C)   nitriﬁcation
D)   fermentation
E)   deaminationF) None of the above
G) B) and E)

Question 5

Anabolic reactions that involve ligases and release water molecules when bonds are formed are called ______ reactions.

Accepted Answer

A)   reduction
B)   condensation
C)   oxidation
D)   transferE) B) and D)
F) A) and B)

Question 6

A holoenzyme is a combination of a protein and one or more substances called ______.

Accepted Answer

A)   substrates
B)   apoenzymes
C)   catalysts
D)   cofactors
E)   ribozymesF) A) and B)
G) D) and E)

Question 7

The majority of NADH is produced in ______.

Accepted Answer

A)   glycolysis
B)   the Krebs cycle
C)   the electron transport system
D)   photosynthesis
E)   fermentationF) A) and D)
G) A) and B)

Question 8

When the product of reaction A becomes the reactant of reaction B, this exempliﬁes a _______ metabolic pathway.

Accepted Answer

A)   linear
B)   bidirectional
C)   convergent
D)   cyclic
E)   divergentF) B) and E)
G) All of the above

Question 9

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 splicingF) None of the above
G) A) and B)

Question 10

A type of cofactor would be ______.

Accepted Answer

A)   vitamins
B)   metallic ions
C)   active sites
D)   substrates
E)   ribozymesF) A) and E)
G) A) and D)

Question 11

All organisms that are photosynthetic are oxygenic.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

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

Question 13

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 B)

Question 14

Denaturing an apoenzyme will destroy the three-dimensional shape of the protein, making it nonfunctional.

Accepted Answer

A) True 
 B)False

Question 15

Each of the following are electron carriers except ______.

Accepted Answer

A)   NAD
B)   FAD
C)   NADP
D)   FADPE) A) and D)
F) B) and C)

Question 16

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?

\quad \quad \quad  enz1  \quad  enz2  \quad  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.
C)   Enzyme 1 has an active site and a regulatory site.
D)   All of the choices are correct. E) A) and D)
F) All of the above

Question 17

In which stage of aerobic respiration is water produced?

Accepted Answer

A)   Glycolysis
B)   The Krebs cycle
C)   The electron transport systemD) A) and B)
E) A) and C)

Question 18

During aerobic cellular respiration, the ﬁnal electron acceptor is ______.

Accepted Answer

A)   pyruvic acid
B)   oxygen
C)   nitrate
D)   cytochrome C
E)   FADF) A) and E)
G) C) and D)

Question 19

Intermediates from the Krebs cycle can be converted to amino acids by the process of ______.

Accepted Answer

A)   amination
B)   deamination
C)   phosphorylation
D)   beta oxidation
E)   gluconeogenesisF) A) and B)
G) A) and D)

Question 20

During which phase of cellular respiration is the majority of ATP formed?

Accepted Answer

A)   Electron transport system
B)   The Krebs cycle
C)   Glycolysis
D)   Processing of pyruvic acid for the Krebs cycle
E)   All phases produce the same number of ATP molecules.F) A) and D)
G) All of the above

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

All organisms that are photosynthetic are oxygenic.

Correct Answer
verified

Intermediates from the Krebs cycle can be converted to amino acids by the process of ______.

Correct Answer
verified

When the product of reaction A becomes the reactant of reaction B, this exempliﬁes a _______ metabolic pathway.

Correct Answer
verified

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 Answer
verified

Reduction of nitrogen-oxygen ions and compounds by some bacteria is called ______.

Correct Answer
verified

During which phase of cellular respiration is the majority of ATP formed?

Correct Answer
verified

A type of cofactor would be ______.

Correct Answer
verified

Each of the following are electron carriers except ______.

Correct Answer
verified

The majority of NADH is produced in ______.

Correct Answer
verified

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

Correct Answer
verified

Anabolic reactions that involve ligases and release water molecules when bonds are formed are called ______ reactions.

Correct Answer
verified

Microbes can utilize only carbohydrates for energy production.

Correct Answer
verified

Denaturing an apoenzyme will destroy the three-dimensional shape of the protein, making it nonfunctional.

Correct Answer
verified

Ribozymes are ______.

Correct Answer
verified

A holoenzyme is a combination of a protein and one or more substances called ______.

Correct Answer
verified

Correct Answer
verified

In which stage of aerobic respiration is water produced?

Correct Answer
verified

During aerobic cellular respiration, the ﬁnal electron acceptor is ______.

Correct Answer
verified

Exergonic reactions _______.

Correct Answer
verified

ATP synthase is a complex enzyme needed for oxidative phosphorylation.

Correct Answer
verified

Exam 8: Microbial Metabolism: the Chemical Crossroads of Life

All organisms that are photosynthetic are oxygenic.

Correct AnswerverifiedShow Answer

Intermediates from the Krebs cycle can be converted to amino acids by the process of ______.

Correct AnswerverifiedShow Answer

When the product of reaction A becomes the reactant of reaction B, this exempliﬁes a _______ metabolic pathway.

Correct AnswerverifiedShow Answer

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

Reduction of nitrogen-oxygen ions and compounds by some bacteria is called ______.

Correct AnswerverifiedShow Answer

During which phase of cellular respiration is the majority of ATP formed?

Correct AnswerverifiedShow Answer

A type of cofactor would be ______.

Correct AnswerverifiedShow Answer

Each of the following are electron carriers except ______.

Correct AnswerverifiedShow Answer

The majority of NADH is produced in ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Anabolic reactions that involve ligases and release water molecules when bonds are formed are called ______ reactions.

Correct AnswerverifiedShow Answer

Microbes can utilize only carbohydrates for energy production.

Correct AnswerverifiedShow Answer

Denaturing an apoenzyme will destroy the three-dimensional shape of the protein, making it nonfunctional.

Correct AnswerverifiedShow Answer

Ribozymes are ______.

Correct AnswerverifiedShow Answer

A holoenzyme is a combination of a protein and one or more substances called ______.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In which stage of aerobic respiration is water produced?

Correct AnswerverifiedShow Answer

During aerobic cellular respiration, the ﬁnal electron acceptor is ______.

Correct AnswerverifiedShow Answer

Exergonic reactions _______.

Correct AnswerverifiedShow Answer

ATP synthase is a complex enzyme needed for oxidative phosphorylation.

Correct AnswerverifiedShow Answer

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