Exam (elaborations) OpenStax Microbiology Test Bank Chapter 8: Microb (BIOL2117)

.OpenStax Microbiology Test Bank Chapter 8: Microbial
Metabolism
Chapter 8: Microbial Metabolism

* = Correct answer

Multiple Choice

1. Which of the following refers to the term metabolism?
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 an endergonic 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
ASM Standard: 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
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, .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
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, .OpenStax Microbiology Test Bank Chapter 8: Microbial
Metabolism

Difficulty: Moderate
ASM Standard: 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
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