Question

A nucleotide is formed of
(a) purine, pyrimidine and phosphate
(b) purine, sugar and phosphate
(c) nitrogenous bases, sugar and phosphate
(d) pyrimidine, sugar and phosphate

Answer 1

Answer:

the required answer is (c)..

Answer 2

A nucleotide is formed of nitrogenous bases, sugar and phosphate.

* A nucleotide refers to a combination of nucleoside and phosphate.

The nucleoside comprises of nitrogenous bases and sugar.

* Nitrogenous bases can be of two types- purines and pyrimidines.

Purine- Adenine, Guanine

Pyrimidine- Cytosine, Thymine and Uracil.

* The sugar and phosphate form the backbone of the DNA/RNA.

* Sugar can be ribose sugar( RNA) or deoxyribose sugar( DNA).