Q. 15.0( 3 Votes )

Given below is a schematic diagram of a portion of DNA.



(a)How many strands are shown in the diagram?

(b) How many nucleotides have been shown in each strand?

(c) Name the parts numbered 1, 2, 3, 4 and 5 respectively.

(d) Name the DNA unit constituted by the parts 1, 2 and 3 collectively.

Answer :

(a) In the given diagram, two strands are shown.

(b) Two nucleotides are shown in each strand.


(c) In the given diagram:


1 represents phosphate; 2 – pentose sugar; 3- nitrogen base; 4 – Hydrogen bond and 5 – nitrogen base.


(d) Nucleotide


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