DNA

                            RNA

(1) The sugar present in DNA is 2-deoxy-D-(-) ribose

(1) The sugar present in RNA is D-(-) Ribose.

(2) DNA contains cytosine and thymine as pyrimidine bases and Adenine & Gaunine as purine bases:

(2) RNA contains cytosine and uracil as pyrimidine bases and Adenine and Gaunine as Purine bases.

(3) DNA has double standard α- helix structure.

(3) RNA has single stranded α-helix structure.

(4) DNA chiefly occurs in nucleus of the cell.

(4) RNA mainly occurs in the cytoplasm of the cell.

(5) DNA molecules are very large (M. Mass 6 million to 16 million).

(5) RNA molecule is much smaller (M. Mass 20000 – 40000).

(6) DNA has unique property of replication.

(7) DNA controls the hereditary effect.  

(6) RNA usually does not replicate.

(7) RNA controls the synthesis of proteins.