AP BIOLOGY

Detailed explanation-1: -RNA polymerase is able to bind the-40 to-60 region of the ada and the aidB promoters in the absence of meAda, and its binding is mediated by the alpha subunit. This region resembles the UP element of the rrnB P1 promoter in location, sequence and mechanism of interaction with RNA polymerase.

Detailed explanation-2: -The RNA polymerase enzyme binds to a specific site called promoter and initiates transcription. The promoter region determines which DNA strand is to be transcribed. Thus, a promoter region has RNA polymerase recognition site and RNA polymerase binding site. So, the correct answer is ‘promoter’

Detailed explanation-3: -Promoters contain specific DNA sequences such as response elements that provide a secure initial binding site for RNA polymerase and for proteins called transcription factors that recruit RNA polymerase.

Detailed explanation-4: -A promoter, as related to genomics, is a region of DNA upstream of a gene where relevant proteins (such as RNA polymerase and transcription factors) bind to initiate transcription of that gene. The resulting transcription produces an RNA molecule (such as mRNA).