Once inside the human body, HIV primarily
infects
a. liver tissue.
b. kidney tissue.
c. red blood cells.
d. white blood cells.
e. all of these.
D
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The polymerase chain reaction (PCR) is used to:
A. generate single copies of whole chromosomes. B. generate multiple copies of whole chromosomes. C. generate a single copy of a targeted region of DNA. D. generate multiple copies of a targeted region of DNA. E. b and d.
If allele T (long tongue) exhibits incomplete dominance over the recessive allele t (short tongue), a heterozygote for this gene would most likely have
A) a long tongue. B) a short tongue. C) a tongue that changes length. D) a tongue of intermediate length.
Pollen grains germinate
a. in the style. b. in the ovule. c. on the stigma. d. at the micropyle. e. in the ovary.
All of the following statements about catalysts are true EXCEPT
A) catalysts increase the reaction rate. B) catalysts are not permanently altered during reaction. C) catalysts increase activation energy requirements. D) biological catalysts are specific enzymes. E) catalysts can be used repeatedly.