Which of the following statements about DNA viruses that affect humans is FALSE?
a. They use the host's enzymes to replicate.
b. They replicate in the nucleus.
c. They are single-stranded.
d. They use the host cell's internal machinery to replicate.
Ans: c. They are single-stranded.
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Where does spermatogenesis occur?
A. vas deferens B. ovaries C. lobules of the testes D. bulbourethral gland E. urethra
If both parents express a particular trait, but their child does not, what does this indicate about the trait?
a. The trait is an autosomal recessive trait. b. The trait is an autosomal dominant trait. c. The trait is sex-linked recessive d. The trait is sex-linked dominant.
A replication fork is:
a. observed only in prokaryotic chromosomes. b. observed only in nondividing cells.. c. a Y-shaped structure where parental DNA strands are separated by helicase. d. a site where one DNA strand serves as a template, but the other strand is not replicated. e. created by the action of the enzyme RNA polymerase
Pollination is an example of ________.
a) a possible source of new drugs b) chemical diversity c) an ecosystem service d) crop pest control