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

Question

Quizplus · Accepted Answer

DNase hypersensitivity is a characteristic of open chromatin, which means that the DNA is more accessible to proteins such as transcription factors. Therefore, a UAS (upstream activating sequence) that is DNase hypersensitive is likely to be constitutively open, meaning it is accessible to transcription factors and can promote gene expression.

UASs Upstream Activating Sequences)are DNase Hypersensitive