37. The greatest expression of the lac operon occurs when lactose levels are (A) low and glucose levels are high (B) low and glucose levels are low (C) high and glucose levels are high (D) high and glucose levels are low

8. The acetylation of lysines on the histone tails... (A)loosens chromatin structure by adding positive charges to histones. (B) recruits the heterochromatin protein HP1, resulting in the establishment of heterochromatin. (C) can be performed on methylated lysines only after they are first demethylated. (D) is a covalent modification and is thus irreversible.

37. The greatest expression of the lac operon occurs when lactose levels are
(A) low and glucose levels are high
(B) low and glucose levels are low
(C) high and glucose levels are high
(D) high and glucose levels are low

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