In RNA synthesis, thymine is complementary
to
a. guanine
b. adenine
c. cytosine
d. uracil
e. more than one of these
D
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Legionella pneumophila is generally transmitted by
A) contaminated food. B) contaminated drinking water. C) contaminated water in coolers, pools, and domestic water systems. D) personâ€"to-person contact.
During penetration of E. coli by the T4 phage
A. lysozyme is used to allow entry of the phage capsid. B. the tail acts as a "hypodermic needle," injecting the phage DNA into the cell. C. the protein fibers digest a hole in the cell wall. D. the bacterial receptor molecules open a hole through the cell wall.
what does the T cytotoxic cell (CTL) do?
What will be an ideal response?
In an evolutionary classification scheme, species within one genus should
a) have identical genes b) be less closely related to one another than they are to species in another genus c) be limited to species that can interbreed d) be more closely related to one another than they are to species in another genus