The Primary Difference Between an Enhancer and a Promoter-Proximal Element

Multiple Choice

The primary difference between an enhancer and a promoter-proximal element is that _____.

A) enhancers are transcription factors;promoter-proximal elements are DNA sequences
B) enhancers enhance transcription;promoter-proximal elements inhibit transcription
C) enhancers are part of the promoter;promoter-proximal elements are regulatory sequences distinct from the promoter
D) enhancers are at considerable distances from the promoter and can be moved or inverted and still function;promoter-proximal elements are close to the promoter and their position and orientation must be maintained
E) enhancers are DNA sequences;promoter-proximal elements are proteins that bind proximal to the promoter