Question
Chemistry Question on Biomolecules
Nucleotide consists of
A
phosphate only
B
phosphate and sugar only
C
phosphate, sugar and nitrogen base
D
phosphate and nitrogen base only
Answer
phosphate, sugar and nitrogen base
Explanation
Solution
A sugar molecule and a nitrogenous base form a nucleoside, and a nucleoside plus a phosphate group form a nucleotide. The nucleotides of RNA are called ribonucleotides, and those of DNA deoxyribonucleotides. Ribonucleotides contain the sugar ribose and dexyribonucleotides the sugar deoxyribose.