UASs Upstream Activating Sequences)are DNase Hypersensitive.This Means That__________

Question

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

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.