Both viruses and viroids are
A. capable of independent reproduction.
B. obligate intracellular parasites.
C. interdependent with one another for reproduction.
D. larger than most bacteria in size.
B
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Autosomes represent ____
a. all chromosomes including the sex chromosomes b. the half of the chromosomes inherited from one parent c. all chromosomes other than the sex chromosomes d. chromosome pairs with unlike members e. those chromosomes found only in gametes
The shape of the virus is determined by its
A. nucleic acid. B. capsid. C. envelope. D. tail.
The flow of energy in the biosphere begins primarily with
A) chemotrophs. B) phototrophs. C) lightning. D) oxidized chemicals. E) high-energy electrons.
Please select the answers below that correspond to structural features of HIV and their host cells necessary for HIV infection to occur.
> The HIV envelope contains glycoproteins that mediate viral absorption and fusion to the host cell. > The helical HIV capsid opens to allow access of its single-stranded DNA genome to the host cell genome. > Infectable host cell membranes must present surface receptors including a CD4 marker, as well as a co-receptor. > Infectable host cells must actively phagocytize the HIV particle through the host cell membrane.