OpenStax Microbiology Test Bank
Chapter 8: Microbial Metabolism
Chapter 8: Microbial Metabolism
* = Correct answer
Multiple Choice
1. Which of the following refers to the termmetabolism?
A. all the reactions in a cell or organism*
B. all the reactions in a cell that break down molecules only
C. all the reactions in a cell that build new molecules only
D. all the reactions in a cell that decompose molecules only
Difficulty:Easy
ASM Standard: N/A
2. Which of the following best describes anendergonic reaction?
A. absorbs energy from the environment*
B. is coupled with another reaction
C. is involved in biosynthesis
D. releases energy into the environment
Difficulty: Easy
ASM Standard: N/A
3. Chemotrophs obtain their energy from which of the following?
A. inorganic chemical reactions only
B. light energy
C. organic chemical reactions only
D. organic and inorganic chemical reactions*
Difficulty: Easy
ASM Standard: 11
4. Which of the following describes a molecule that had an electron removed?
A. anabolized
B. electronated
C. oxidized*
D. reduced
Difficulty: Easy
ASMStandard:N/A
5. Which of the following best describes the subcomponents of pyrophosphate?
A. two inorganic phosphate molecules*
B. two organic phosphate molecules
C. three inorganic phosphate molecules
Page 1 of 16
,OpenStax Microbiology Test Bank
Chapter 8: Microbial Metabolism
D. three organic phosphate molecules
Difficulty: Easy
ASM Standard: N/A
6. Which molecule is often called the cell’s energy currency?
A. adenosine triphosphate*
B. flavin adenine dinucleotide
C. nicotinamide adenine dinucleotide
D. nicotinamide adenine dinucleotide phosphate
Difficulty: Easy
ASM Standard: N/A
7. Which site on an enzyme is where substrates bind?
A. the activation site
B. the active site*
C. the catalyst site
D. the lock and key site
Difficulty: Easy
ASM Standard: N/A
8. Which of the following are inorganic molecules that bind to enzymes?
A. apoenzymes
B. coenzymes
C. cofactors*
D. holoenzymes
Difficulty: Easy
ASM Standard: N/A
9. Which of the following best describes catabolic pathways?
A. They always absorb energy.
B. They break down large molecules into smaller components.*
C. They build up large molecules from smaller components.
D. They must be coupled with the breakdown of ATP.
Difficulty: Moderate
ASM Standard: N/A
10. Which group comprises all lithotrophs?
A. algae
B. autotrophs
C. microbes*
D. plants
Page 2 of 16
, OpenStax Microbiology Test Bank
Chapter 8: Microbial Metabolism
Difficulty:Moderate
ASMStandard:11, 20, 22
11. Which is a common electron acceptor in catabolic reactions?
A. ATP
B. FADH2
C. NAD+*
D. NADPH
Difficulty:Moderate
ASM Standard: N/A
12. The reaction that breaks down ATP to form ADP and inorganic phosphate is classified as
which of the following?
A. endergonic
B. exergonic*
C. nonspontaneous
D. reduction
Difficulty:Moderate
ASM Standard: N/A
13. Which of the following is an inhibitor that binds to the active site of an enzyme?
A. a competitive inhibitor*
B. a noncompetitive inhibitor
C. an allosteric inhibitor
D. an uncompetitive inhibitor
Difficulty:Moderate
ASM Standard: N/A
14. Glycolysis produces a net gain of which of the following?
A. two ATP, two NADH, and two pyruvates*
B. two ATP, two NADH, and four pyruvates
C. two ATP, four NADH, and two pyruvates
D. four ATP, two NADH, and two pyruvates
Difficulty:Easy
ASM Standard: N/A
15. Which of the following is a pathway that breaks down glucose in some microbes?
A. the Calvin cycle
B. the Entner-Doudoroff pathway*
C. the Krebs cycle
D. the tricarboxylic acid cycle
Page 3 of 16
Chapter 8: Microbial Metabolism
Chapter 8: Microbial Metabolism
* = Correct answer
Multiple Choice
1. Which of the following refers to the termmetabolism?
A. all the reactions in a cell or organism*
B. all the reactions in a cell that break down molecules only
C. all the reactions in a cell that build new molecules only
D. all the reactions in a cell that decompose molecules only
Difficulty:Easy
ASM Standard: N/A
2. Which of the following best describes anendergonic reaction?
A. absorbs energy from the environment*
B. is coupled with another reaction
C. is involved in biosynthesis
D. releases energy into the environment
Difficulty: Easy
ASM Standard: N/A
3. Chemotrophs obtain their energy from which of the following?
A. inorganic chemical reactions only
B. light energy
C. organic chemical reactions only
D. organic and inorganic chemical reactions*
Difficulty: Easy
ASM Standard: 11
4. Which of the following describes a molecule that had an electron removed?
A. anabolized
B. electronated
C. oxidized*
D. reduced
Difficulty: Easy
ASMStandard:N/A
5. Which of the following best describes the subcomponents of pyrophosphate?
A. two inorganic phosphate molecules*
B. two organic phosphate molecules
C. three inorganic phosphate molecules
Page 1 of 16
,OpenStax Microbiology Test Bank
Chapter 8: Microbial Metabolism
D. three organic phosphate molecules
Difficulty: Easy
ASM Standard: N/A
6. Which molecule is often called the cell’s energy currency?
A. adenosine triphosphate*
B. flavin adenine dinucleotide
C. nicotinamide adenine dinucleotide
D. nicotinamide adenine dinucleotide phosphate
Difficulty: Easy
ASM Standard: N/A
7. Which site on an enzyme is where substrates bind?
A. the activation site
B. the active site*
C. the catalyst site
D. the lock and key site
Difficulty: Easy
ASM Standard: N/A
8. Which of the following are inorganic molecules that bind to enzymes?
A. apoenzymes
B. coenzymes
C. cofactors*
D. holoenzymes
Difficulty: Easy
ASM Standard: N/A
9. Which of the following best describes catabolic pathways?
A. They always absorb energy.
B. They break down large molecules into smaller components.*
C. They build up large molecules from smaller components.
D. They must be coupled with the breakdown of ATP.
Difficulty: Moderate
ASM Standard: N/A
10. Which group comprises all lithotrophs?
A. algae
B. autotrophs
C. microbes*
D. plants
Page 2 of 16
, OpenStax Microbiology Test Bank
Chapter 8: Microbial Metabolism
Difficulty:Moderate
ASMStandard:11, 20, 22
11. Which is a common electron acceptor in catabolic reactions?
A. ATP
B. FADH2
C. NAD+*
D. NADPH
Difficulty:Moderate
ASM Standard: N/A
12. The reaction that breaks down ATP to form ADP and inorganic phosphate is classified as
which of the following?
A. endergonic
B. exergonic*
C. nonspontaneous
D. reduction
Difficulty:Moderate
ASM Standard: N/A
13. Which of the following is an inhibitor that binds to the active site of an enzyme?
A. a competitive inhibitor*
B. a noncompetitive inhibitor
C. an allosteric inhibitor
D. an uncompetitive inhibitor
Difficulty:Moderate
ASM Standard: N/A
14. Glycolysis produces a net gain of which of the following?
A. two ATP, two NADH, and two pyruvates*
B. two ATP, two NADH, and four pyruvates
C. two ATP, four NADH, and two pyruvates
D. four ATP, two NADH, and two pyruvates
Difficulty:Easy
ASM Standard: N/A
15. Which of the following is a pathway that breaks down glucose in some microbes?
A. the Calvin cycle
B. the Entner-Doudoroff pathway*
C. the Krebs cycle
D. the tricarboxylic acid cycle
Page 3 of 16
