Question

Which of the following statement(s) is/are correct?
(i) Information regarding the sequence of nucleotides in the chain of a nucleic acid is called its primary structure.
(ii) In secondary structure of DNA adenine forms hydrogen bonds with guanine whereas cytosine forms hydrogen bonds with thymine.
(iii) RNA molecules are of three types’ m-RNA, r-RNA and t-RNA and they all perform different functions.​

Answer 1

Statements 1 and 3 are correct.

1)Information regarding the sequence of nucleotides in the chain of a nucleic acid is called its primary structure. The nucleotides in a DNA are connected by phosphodiester bond.

2) In secondary structure adenine forms two hydrogen bonds with thymine and guanine forms three hydrogen bonds with cytosine.

3) RNA are of three types a) ribosomal RNA,rRNA

                                           b) messenger RNA, mRNA

                                           c) transfer RNA, tRNA