Question

An acid soluble compound formed by phosphorylation of nucleoside is called

• A. Nitrogen base
• B. Adenine
• C. Sugar phosphate
• D. Nucleotide

Answer 1

The correct option is D Nucleotide

A nucleotide has three components – a nitrogenous base, a pentose sugar (ribose in case of RNA, and deoxyribose for DNA), and a phosphate group.

A nitrogenous base is linked to the pentose sugar through a N-glycosidic linkage to form a nucleoside, such as adenosine or deoxyadenosine, guanosine or deoxyguanosine, cytidine or deoxycytidine and uridine or deoxythymidine. When a phosphate group is linked to 5' -OH of a nucleoside through phosphoester linkage, a corresponding nucleotide (or deoxynucleotide depending upon the type of sugar present) is formed.

So, the correct option is 'Nucleotide'.