Question

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 1

(a) 2
(b) 2 on each strand
(c) 1- Phosphate, 2- Sugar, 3- Nitrogen Base, 4- Hydrogen Bond, 5 – Base
(d) Nucleotide