Epigenetic investigation, although of recent origin, has already identified
A) many active areas of nongene (junk) DNA.
B) various kinds of small RNA molecules.
C) histone remodeling as an important mechanism by which experience can influence gene expression.
D) DNA methylation as an important epigenetic mechanism.
E) all of the above
Question 2
Searle (1949) found that, in comparison to maze-dull rats, maze-bright rats were
A) not generally superior in learning ability.
B) less emotional.
C) more emotional.
D) both A and B
E) both A and C
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Epigenetic changes to DNA, such as methylation, change patterns of gene expression by activating or