Class II MHC proteins have grooves with

A) closed ends.
B) open ends.
C) both open and closed ends.
D) neither open nor closed ends.


Answer: B

Biology & Microbiology

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The nerve supply of the vagina is:

A. evenly distributed throughout its length. B. concentrated in the upper third around the cervix. C. scant, if not nonexistent. D. concentrated in the lower third near the introitus

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The site where RNA polymerase attaches to the DNA molecule to start the formation of mRNA is called a(n)

A. exon. B. operator. C. promoter. D. operon.

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A recessive trait will be observed in individuals that are ________ for that trait.

a) heterozygous b) homozygous or heterozygous c) homozygous d) diploid

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