Acyclovir is the drug used to treat genital herpes; it
A. lyses the virus.
B. reduces the healing time.
C. cures the disease.
D. All of the choices are correct.
Answer: B
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The only gene that has been positively identified with the onset of Alzheimer disease encodes a protein that _____
a. is involved in cholesterol metabolism b. breaks down neurotransmitters c. maintains the health of striatum cells d. attaches amino acids to tRNA molecules e. breaks down fatty deposits around neurons
Kelp is a type of algae in a complex ecosystem off the Pacific coast of North America. If kelp forests shrunk in size or vanished, many other species would be affected. Kelp are ____ species in this ecosystem.
a) excluded b) keystone c) competitive d) predator
It is beneficial to study microbial communities in situ because ________.
A. microbes can be studied even if they are nonculturable B. gene expression may be different in an environmental sample versus an anexic culture C. in situ studies maintain the relative concentrations of different microorganisms in a sample D. All of these are reasons to study microbial communities in situ.
Select the correct statement regarding the human female reproductive system.
A. The Fallopian tubes transport ova from the ovary to the uterus. B. The uterus is lined with granulosa cells. C. The ovarian fimbria is the functional unit of the ovary. D. The granulosa cells secrete testosterone, which triggers menarche. E. The cervix contains corpora cavernosa tissue, which is a type of erectile tissue.