UASs (upstream activating sequences) are DNase hypersensitive. This means that ________
A) a UAS is constitutively open
B) each UAS has more histone-binding sites than non-UAS sites
C) any given UAS is composed of a double-stranded site with a bound repressor
D) more than one strand of DNA exists in each UAS
E) each UAS is likely to be single stranded
Answer: A
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