Question

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

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

(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, 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