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

Question

Quizplus · Accepted Answer

DNase hypersensitivity refers to a region of chromatin that is more accessible to enzymatic cleavage by DNase than the rest of the chromatin. This sensitivity occurs because the region is not wrapped as tightly around histones, making it more open and easier to access. UASs are DNase hypersensitive, meaning that they are constitutively open and accessible to regulatory factors.

UASs (Upstream Activating Sequences)are DNase Hypersensitive