2026/2027 Test Bank for Brock Biology of Microorganisms 14th Edition Chapter 2

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Brock Biology of Microorganisms, 14e (Madigan et al.)
Chapter 2 Microbial Cell Structure and Function

Multiple Choice Questions

1) An organism of the genus Staphylococcus is , while an organism of the genus
Spirochaeta is .
A) spherical / rod shaped
B) rod shaped / coiled
C) spherical / coiled
D) coiled / spherical
Answer: C
Bloom's Taxonomy: Comprehension
Chapter Section: 2.5

2) Bacteria with type IV pili
A) possess tubular or stalk-like extensions of their cells.
B) likely exhibit twitching motility.
C) have capsules that promote dehydration.
D) live in aquatic environments.
Answer: B
Bloom's Taxonomy: Comprehension
Chapter Section: 2.13

3) The terms "run" and "tumble" are generally associated with
A) eukaryotic cells.
B) nutrient transport.
C) chemotaxis.
D) clustering of certain rod-shaped bacteria.
Answer: C
Bloom's Taxonomy: Knowledge
Chapter Section: 2.17

4) The morphology of a cell influences its
A) motility.
B) metabolism.
C) surface-to-volume ratio.
D) motility and surface-to-volume ratio.
Answer: D
Bloom's Taxonomy: Comprehension
Chapter Section: 2.5




1
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5) Compared to Eukaryotes, Bacteria and Archaea have surface-to-volume ratios,
causing nutrient exchange and growth rates.
A) lower / lower
B) lower / higher
C) higher / lower
D) higher / higher
Answer: D
Bloom's Taxonomy: Application
Chapter Section: 2.6

6) The cytoplasmic membrane could best be described as
A) an impermeable barrier.
B) a passive conduit for intracellular transport.
C) a highly selective permeability barrier.
D) a rigid structure that protects the cell.
Answer: C
Bloom's Taxonomy: Comprehension
Chapter Section: 2.9

7) The use of the Gram stain in microbiology is important because it differentiates
A) Bacteria from Archaea.
B) prokaryotic from eukaryotic cells.
C) bacterial cells with different types of cell walls.
D) archaeal cells with different types of metabolism.
Answer: C
Bloom's Taxonomy: Comprehension
Chapter Section: 2.7

8) Some archaea have unique phospholipids in their cytoplasmic membrane that
A) form a monolayer due to the presence of diglycerol tetraethers.
B) form a bilayer due to the presence of sterols.
C) form a stable ring structure due to the presence of crenarchaeol.
D) form a bilayer due to the presence of phosphatidylethanolamine.
Answer: A
Bloom's Taxonomy: Knowledge
Chapter Section: 2.7

9) Carrier-mediated transport is necessary when
A) diffusion will not allow adequate amounts of a substance to enter the cell.
B) movement into the cell is against a concentration gradient.
C) the level of nutrients in nature is very low.
D) nutrient concentration is very low in the environment, is higher inside of the cell, or diffusion
is not possible.
Answer: D
Bloom's Taxonomy: Comprehension
Chapter Section: 2.6

2
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