Temperature is a bacterial growth requirement. In which category are most human pathogens found?
a. mesophile
b. thermophile
c. psychrophile
d. hyperthermophile
Answer: a. mesophile
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In the trp operon, attenuation occurs through translation of two Trp codons in the leader sequence. What would happen if these two codons were mutated to stop codons?
A) Region 1 will bind to region 3 in the absence of Trp. B) The antiterminator loop will form in the presence or absence of Trp. C) Region 3 will bind to region 4 in and transcription will proceed in the presence or absence of Trp. D) Region 3 will bind to region 1 in the presence of Trp.
All mRNA transcripts begin with
a. methionine. b. a ribosome. c. AUG. d. the P site. e. an anticodon.
The protective covering of the brain is (are) the
a. ventricles. b. meninges. c. tectum. d. olfactory and optic bulbs. e. pineal gland.
The bacterial genome often consists of a single chromosome that carries all of the essential genes and one or more varieties of plasmid that generally carry non-essential genes.
a. true b. false