LIFE SCIENCE

Detailed explanation-1: -A promoter is a region of DNA where RNA polymerase binds to initiate transcription. A terminator is a sequence of DNA that causes RNA polymerase to terminate transcription. A transcription unit is the sequence between sites of initiation and termination by RNA polymerase; may include more than one gene.

Detailed explanation-2: -A promoter is a short region of DNA (100–1, 000 bp) where transcription of a gene by RNA polymerase begins. It is typically located directly upstream or at the 5′ end of the transcription initiation site.

Detailed explanation-3: -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).

Detailed explanation-4: -Promoter sequences define the direction of transcription and indicate which DNA strand will be transcribed; this strand is known as the sense strand.