Which of the following components is involved in the initiation of transcription?

primer

origin

promoter

start codon

Promoter.

Explanation:

Transcription may be defined as the process of generation of the RNA molecule from the DNA template. The process of transcription includes initiation, elongation and termination.

Promoter may be defined as the region of DNA that are located in the upstream region. The initiation of transcription requires the promoter region that allows the binding of RNA polymerase at the initiation site.

Thus, the correct answer is option (3).