Question

Which of the following is important for transcription?

• A. CAAT box
• B. Promoter
• C. RNA polymerase
• D. All of the above

Answer 1

The correct option is D All of the above

CAAT is a promoter sequence that lies between -70 and -80 base pairs and is essential for transcription initiation. The sequence is GGT/ACAATCT. The promoter is a DNA segment that serves to initiate transcription of a particular gene. They are present upstream near the transcription start sites of genes and provide the binding site for RNA polymerase. Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA (mRNA) by the enzyme RNA polymerase. Thus, the correct answer is option D.