This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
RNA polymerase recognizes? 
Select and explain. 
A. Promoter site, B. Initiation site, C. Regulator site, D. Stop site
A: Promoter site
Answer: A: Promoter site 
Explanation: (40) Promoter site REF: Harper 27`h ed p. 349 RNA polymerase has sigma sub unit which recognises promotor nucleotide sequence. It does not require primer and has no proof reading activity Types: r RNA m RNA, mi RNA, Sn RNA t- RNA, 5s-rRNA, some SnRNA