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

Question

Quizplus · Accepted Answer

The primary difference between an enhancer and a promoter-proximal element is that 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. Enhancers enhance transcription, while promoter-proximal elements regulate transcription by recruiting transcription factors and RNA polymerase to the promoter. Enhancers are distinct from the promoter, while promoter-proximal elements are regulatory sequences located close to the promoter.

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