Question 1

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

Question 2

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

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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) A) and D)

Question 5

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

Accepted Answer

A)  Mitochondria
B)  Within the cell membrane
C)  Lysosomes
D)  Cytoplasm
E)  Outside of the cellF) None of the above
G) C) and D)

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)  None of the choices are correctF) A) and C)
G) A) and E)

Question 7

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

Question 8

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 C)
G) None of the above

Question 9

All of the following are exoenzymes except

Accepted Answer

A)  ATP synthase
B)  Streptokinase
C)  Penicillinase
D)  Collagenase
E)  ElastaseF) D) and E)
G) A) and E)

Question 10

What chemical causes death in many eukaryotes because it blocks cytochrome c oxidase?

Accepted Answer

A)  Copper
B)  Iron
C)  Cyanide
D)  Oxygen
E)  Carbon monoxideF) A) and E)
G) B) and D)

Question 11

Important components of coenzymes are

Accepted Answer

A)  Vitamins
B)  Metallic ions
C)  Active sites
D)  Substrates
E)  RibozymesF) A) and C)
G) C) and E)

Question 12

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 E)
G) None of the above

Question 13

In bacterial cells, the electron transport system is located in the

Accepted Answer

A)  Cell membrane
B)  Mitochondria
C)  Chloroplasts
D)  Ribosomes
E)  CytoplasmF) C) and D)
G) None of the above

Question 14

Exoenzymes from pathogens are called virulence factors.

Accepted Answer

A) True 
 B)False

Question 15

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) B) and C)
G) A) and E)

Question 16

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

Question 17

Feedback inhibition is best described as

Accepted Answer

A)  Substrate binding to DNA, blocking enzyme transcription
B)  Product binding to DNA, blocking enzyme transcription
C)  Substrate binding to enzyme in non-competitive site
D)  Product binding to enzyme in non-competitive site
E)  None of the choices are correctF) A) and B)
G) B) and E)

Question 18

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

Accepted Answer

A)  Anabolism
B)  Phosphorylation
C)  Fermentation
D)  Exergonic
E)  GlycolysisF) All of the above
G) A) and C)

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 C)
G) C) and D)

Question 20

When enzyme action stops due to a buildup of end product, this control is called

Accepted Answer

A)  Negative feedback
B)  Competitive inhibition
C)  Enzyme induction
D)  Enzyme repression
E)  Feedback inhibitionF) A) and E)
G) B) and D)

Exam 8: An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

During aerobic cellular respiration, the final electron acceptor is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In bacterial cells, the electron transport system is located in the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Exoenzymes from pathogens are called virulence factors.

Correct AnswerverifiedShow Answer

Important components of coenzymes are

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Exergonic reactions

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

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

Correct AnswerverifiedShow Answer

Feedback inhibition is best described as

Correct AnswerverifiedShow Answer

Ribozymes are

Correct AnswerverifiedShow Answer

All of the following are exoenzymes except

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What chemical causes death in many eukaryotes because it blocks cytochrome c oxidase?

Correct AnswerverifiedShow Answer

The process of forming glucose from various metabolic intermediates is called

Correct AnswerverifiedShow Answer

When enzyme action stops due to a buildup of end product, this control is called

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified