試題詳解

21. Gene transcription is a multi-step process. Which of the following statement(s) is (are) NOT correct?
(A) Repressors direct histone deacetylation at specific genes thereby prevent the transcriptions of genes
(B) Activators are composed of DNA binding domain and transactivating domain, which directs histone acetylation or other co-activators to promote gene transcriptions.
(C) Purified RNA polymerase II cannot initiate gene transcription without the assistance from general transcription factors that position RNA polymerase II at the start site
(D) Enhancers are the transcription-control regions on the genomic DNA. Enhancers contain binding sites for transcription factors
(E) None of the above is correct