How does a retrovirus prepare its genetic material for incorporation into the host cell genome?
a. Viral reverse transcriptase uses viral RNA to make double-stranded viral DNA.
b. Viral reverse transcriptase uses viral single-stranded DNA to make double-stranded viral DNA.
c. Viral reverse transcriptase uses viral RNA to make double-stranded viral RNA.
d. Host enzymes incorporate viral RNA directly into the genome.
e. Host enzymes covert viral RNA to double-stranded viral DNA.
a
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Which of the following correctly lists the three forms of nitrogenous waste in order from least energetically expensive to produce to most energetically expensive to produce?
A. uric acid, urea, ammonia B. uric acid, ammonia, urea C. urea, uric acid, ammonia D. ammonia, uric acid, urea E. ammonia, urea, uric acid
The most accurate nucleotide base composition of the DNA double helix is
A. G=A B. T=C C. T+A=C+G D. T+G=A+C E. A=U
The only survivors of a colony on Venus are a man and a woman, who happen to be both originally
from the southern Ukraine. Their descendants will show the effect of
a. genetic drift. b. punctuated equilibrium. c. excessive mutation. d. heterozygote advantage. e. frequency-dependent selection.
Describe the organization of the ?-globin gene in humans
What will be an ideal response?