Question

In a transcription, unit promoter is said to be located towards

• A. 3' end of structural gene
• B. 5' end of structural gene
• C. 5' end of template strand
• D. 3' end of non-template strand

Answer 1

The correct option is B 5' end of structural gene

• Promoter sequences are DNA sequences in the region in the gene where the RNA polymerase will bind and initiate the process of transcription.
• They are located upstream at the 5' end of the transcription initiation site in the structural gene.
• Promoter sequences define the direction of transcription and indicate the DNA strand that will be transcribed.
• The strand which is from 5'-3' is the non-template strand and the strand which runs from 3'-5' is known as the template strand.

Thus, the correct answer is option B.