Codon bias suggests that
A) some codons evolved earlier than others.
B) not all nonsynonymous substitutions are neutral.
C) some codons are selectively favored over others.
D) small fitness effects can make a large difference over time.
E) some tRNAs are more abundant than others.
C
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Which of the following is involved in DNA replication?
a. RNA polymerase b. ligase c. promoter d. terminator
Which of the following is true of a
methylation?
a. the particular methylation is passed on in mitosis b. chemicals in cigarette smoke remove methyl groups c. methylation is never a random event d. histones are immune to methylation e. methylation is always harmful
__________ fungi include common molds.
Fill in the blank(s) with the appropriate word(s).
Pathogenic bacteria isolated from the respiratory or intestinal tracts of humans are
A) strict aerobes that grow best in candle jars. B) capnophiles that grow best in carbon dioxide incubators. C) facultative anaerobes that require reducing media for growth. D) strict aerobes that grow best in reducing media. E) capnophiles that prefer highly oxygenated growth conditions.