Biology (Raven), 10th Edition

Chapter 28: Prokaryotes

Pre-Test

1
Which of the following statements helps to explain how bacteria can become antibiotic-resistant?
A)Genes can produce proteins that provide resistance.
B)Spontaneous mutations can provide variations in gene function.
C)Antibiotic use will select for bacteria that are resistant.
D)Bacteria can receive an R plasmid.
E)All of the above are correct.
2
Cell division in bacteria takes place mainly by
A)conjugation.
B)binary fission.
C)sporulation.
D)fragmentation.
E)mitosis.
3
Some bacteria form a thick-walled ____ in response to poor nutrient conditions.
A)endospore
B)capsule
C)sheath
D)pilus
E)autospore
4
Gram-negative bacteria do not stain purple as gram-positive do because they have
A)too much glycoprotein.
B)a polymer coating.
C)less peptidoglycan.
D)an additional polysaccharide.
E)too much lipoprotein.
5
The genome of bacteria is normally in
A)a nucleoid region.
B)an endospore.
C)a plasmid.
D)a pilus.
E)a heterospore.
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