Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Enzymes are

Accepted Answer

A)  broken down in reactions that require energy input.
B)  proteins that function as catalysts.
C)  used up in chemical reactions.
D)  not needed for catabolic reactions.
E)  carbohydrate or protein in composition.F) All of the above
G) A) and C)

Question 3

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 glycolysisF) All of the above
G) B) and E)

Question 4

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

Accepted Answer

A)  cell membrane
B)  mitochondria
C)  chloroplasts
D)  ribosomes
E)  cytoplasmF) A) and D)
G) C) and D)

Question 5

An oxidase detection test can be used to identify certain bacteria because they are missing or lack expression of ______.

Accepted Answer

A)  cytochrome C oxidase
B)  NAD
C)  mitochondria
D)  ATP synthase
E)  coenzyme QF) A) and B)
G) B) and C)

Question 6

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 D)
G) A) and C)

Question 7

Enzymes that function inside a cell are ______.

Accepted Answer

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

Question 8

Oxygen-containing ions are used by some bacteria in their electron transport system.

Accepted Answer

A) True 
 B)False

Question 9

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 ATP.F) A) and B)
G) A) and C)

Question 10

Most electron carriers are ______.

Accepted Answer

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

Question 11

Each of the following are true of enzymes except

Accepted Answer

A)  they can be used over and over.
B)  they may or may not require cofactors.
C)  their active site is specific to the substrate.
D)  they increase the activation energy of a reaction.
E)  their action may involve minerals.F) B) and D)
G) A) and B)

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

Question 13

Glyceraldehyde-3-phosphate is an intermediary of glycolysis that can also be utilized in biosynthetic pathways.

Accepted Answer

A) True 
 B)False

Question 14

The unknown bacterium that you are testing makes the enzyme phenyalanine deaminase, as indicated by the results of a phenylalanine test.This enzyme facilitates the removal of a/an ______ group from the organic compound so it can be converted into an intermediate compound for the Krebs cycle.

Accepted Answer

A)  carboxyl
B)  amino
C)  phosphate
D)  hydroxylE) B) and D)
F) A) and D)

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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

Question 18

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

Accepted Answer

A)  They occur in thylakoid membranes.
B)  They generate NADPH.
C)  They generate glucose from CO2 and H2O.
D)  The photons cause magnesium to release electrons.
E)  ATP is generated by a chemiosmotic mechanism.F) None of the above
G) A) and E)

Question 19

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 D)

Exam 8: Microbial Metabolism: The Chemical Crossroads of Life

Exergonic reactions

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

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Enzymes that function inside a cell are ______.

Correct Answer
verified

Most electron carriers are ______.

Correct Answer
verified

The unknown bacterium that you are testing makes the enzyme phenyalanine deaminase, as indicated by the results of a phenylalanine test.This enzyme facilitates the removal of a/an ______ group from the organic compound so it can be converted into an intermediate compound for the Krebs cycle.

Correct Answer
verified

Enzymes are

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Oxygen-containing ions are used by some bacteria in their electron transport system.

Correct Answer
verified

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

Correct Answer
verified

The principle sites of amphibolic interaction occur during ______.

Correct Answer
verified

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

Correct Answer
verified

Each of the following are true of enzymes except

Correct Answer
verified

An oxidase detection test can be used to identify certain bacteria because they are missing or lack expression of ______.

Correct Answer
verified

Glyceraldehyde-3-phosphate is an intermediary of glycolysis that can also be utilized in biosynthetic pathways.

Correct Answer
verified

Exam 8: Microbial Metabolism: The Chemical Crossroads of Life

Exergonic reactions

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Enzymes that function inside a cell are ______.

Correct AnswerverifiedShow Answer

Most electron carriers are ______.

Correct AnswerverifiedShow Answer

The unknown bacterium that you are testing makes the enzyme phenyalanine deaminase, as indicated by the results of a phenylalanine test.This enzyme facilitates the removal of a/an ______ group from the organic compound so it can be converted into an intermediate compound for the Krebs cycle.

Correct AnswerverifiedShow Answer

Enzymes are

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Oxygen-containing ions are used by some bacteria in their electron transport system.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The principle sites of amphibolic interaction occur during ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Each of the following are true of enzymes except

Correct AnswerverifiedShow Answer

An oxidase detection test can be used to identify certain bacteria because they are missing or lack expression of ______.

Correct AnswerverifiedShow Answer

Glyceraldehyde-3-phosphate is an intermediary of glycolysis that can also be utilized in biosynthetic pathways.

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