試題詳解

10.The primary difference between enhancers and promoter-proximal elements is that enhancers_______.  
(A) enhance transcription； promoter-proximal elements inhibit transcription.
(B) are transcription factors； promoter-proximal elements are DNA sequences.
(C) are at considerable distances from the promoter； promoter-proximal elements are close to the promoter.
(D) are DNA sequences； promoter-proximal elements are also DNA sequences.
(E) are regulated by RNA for their functions.