Question

Choose the correct answers from the alternatives given :
An RNA molecule is:

• A. usually double-stranded
• B. usually single-stranded
• C. always double-stranded
• D. a double helix

Answer 1

The correct option is B usually single-stranded

An RNA molecule is a much shorter chain of nucleotides. It is not only involved in genetic coding but also has versatile roles as a biomolecule. RNA has various functions as an enzyme and an adapter molecule. The double-stranded structure of RNA is somewhat unstable. This is so because alignment of phosphate groups and H bonds form deep cleft or grooves within the side rails of the dsRNA, making it unstable.

So, it is usually single-stranded.

So, the correct option is 'usually single-stranded'.