Question

What form of helix would you expect to see in double stranded RNA?

(a) A form

(b) B form

(c) C form

(d) D form

I had been asked this question in an interview for internship.

Question is from Transcription in Prokaryotes : Termination topic in section Gene Expression : Transcription Prokaryotes of Cytogenetics

Answer 1

Right answer is (a) A form

The explanation is: Double stranded RNA generally forms A form helix while double stranded DNA forms B form helix. The other forms also occur in DNA under special conditions.