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Question : Label the parts of the DNA in the diagram given below. Explain the structural briefly. Structure of DNA:

Answer»

Solution :DNA is the hereditary material as it contains the genetic information. DNA is a large molecule, consisting of millions of nucleotides. Each nucleotide consists of three compounds.
(a) A sugar molecule - Deoxy Ribose sugar
(b) A nitrogenous base [Purines and Pyrimidines]
(i) Purines (Adenine and Guanine)
(ii) Pyrimidines (CYTOSINE and THYMINE)
(c ) A phosphate GROUP
Nucleoside and Nucleotide:
Nucleoside = Nitrogen base + sugar
Nucleotide = Nucleoside + Phosphate
The nucleotides are formed ACCORDING to the purines and pyrimidines present in them.


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