Question

 

Complete the above-given diagram of a transcription unit.

Options

• A - Transcription start site, B - Promoter, C - Template strand

• A - Promoter, B - Transcription start site, C - Template strand

• A - Template strand, B - Upstream, C - Promoter

• A - Promoter, B - Upstream, C - Template strand

Answer 1

A - Promoter, B - Transcription start site, C - Template strand

Explanation:

• A - Promoter, B - Transcription start site, C - Template strand. A is positioned towards the 5' end of the structural gene and serves as an RNA polymerase binding site.
• B - (Transcription start site) is the location where the first DNA nucleotide is transcribed into RNA.
• C - (Template strand) acts as a base for mRNA transcription.