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BIOLOGY 206 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
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
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*
4. Which of the following describes a molecule that had an electron removed?
A. anabolized
B. electronated
C. oxidized*
D. reduced
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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BIOLOGY 206 OpenStax Microbiology Test Bank- Chapter
8: Microbial Metabolism
D. three organic phosphate molecules
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
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
8. Which of the following are inorganic molecules that bind to enzymes?
A. apoenzymes
B. coenzymes
C. cofactors*
D. holoenzymes
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.
10. Which group comprises all lithotrophs?
A. algae
B. autotrophs
C. microbes*
D. plants
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BIOLOGY 206 OpenStax Microbiology Test Bank- Chapter
8: Microbial Metabolism
11. Which is a common electron acceptor in catabolic reactions?
A. ATP
B. FADH2
C. NAD+
*
D. NADPH
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
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
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
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
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