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,while promoter-proximal elements are DNA sequences.
B) enhancers enhance transcription,while promoter-proximal elements inhibit transcription.
C) enhancers are part of the promoter,while 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,while promoter-proximal elements are close to the promoter and their position and orientation must be maintained.
E) enhancers are DNA sequences,while promoter-proximal elements are proteins that bind proximal to the promoter.