Question

A N${}_2$ base together with pentose sugar and phosphate forms

OR

Building-block unit of nucleic acid is a

• A. Nucleoside
• B. Polypeptide
• C. Nucleotide
• D. Amino acid

Answer 1

The correct option is C Nucleotide

The two DNA strands are known as polynucleotides since they are composed of simpler units called nucleotides. Each nucleotide is composed of a nitrogen-containing nucleobase either guanine (G), adenine (A), thymine (T), or cytosine (C) as well as a monosaccharide sugar called deoxyribose and a phosphate group. Presnce of nitrogen base with a pentose sugar is the characteristic of DNA.