Drugs designed to fight HIV work by
a. preventing binding of HIV to host cell.
b. slowing reverse transcription.
c. preventing integration of viral DNA.
d. preventing viral protein production.
e. all of these.
Answer: e
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Even though the phylogenetic lineages for hominins are not definitive, four of the following statements describe
possibilities. Which is NOT a possibility? a. Homo preceded Australopithecus. b. Homo sapiens is the most recent. c. Australopithecus is probably more ancient than Homo. d. Homo erectus preceded Homo sapiens. e. Chimpanzees and bonobos are the closest living relatives to modern humans.
During mitotic anaphase, chromosomes migrate
a. from the poles of the cell toward the equatorial plate. b. from the equatorial plate toward the poles. c. toward the nuclear envelope. d. along with their sister chromatids toward one pole. e. along with the other member of the homologous pair toward the equatorial plate.
Food provides
A) raw materials for biosynthesis only. B) energy for cell activities only. C) raw materials for biosynthesis and energy for cell activities.
How can a hormone that is present in very small quantities within the bloodstream elicit such a large response within a cell?
-Cells degrade the hormone into many tiny molecules, and then each piece creates a response within the cell. -The hormone is only taken up by the largest cells in the body, and thus it can elicit a large response. -The hormone is always an extra large macromolecule even though it is present in minute quantities. -The message from the hormone is amplified many times within the cell.