AIDS is caused by the retrovirus HIV, which makes DNA complementary to the viral RNA using
a. RNA polymerase
b. beta-galactosidase
c. RNA synthase
d. ATPase
e. reverse transcriptase
Ans: e. reverse transcriptase
Biology & Microbiology
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Answer the question using the accompanying figure. The antigen-binding site is indicated by number____
a. 1 b. 2 c. 4 d. 5 e. 6
Biology & Microbiology
The above figure represents
a. normal apoptosis. b. two digits that did not separate due to low apoptosis. c. elongated digital cell development. d. a special effect from an alien movie. e. none of these.
Biology & Microbiology
An important mediator of a type I hypersensitivity reaction is
a. complement. b. antigen-antibody immune complexes. c. T cells. d. histamine.
Biology & Microbiology
During which phase of mitosis does chromatin condense into chromosomes as the nuclear membrane breaks down?
metaphase interphase anaphase prophase telophase
Biology & Microbiology