nucleotide definition by Wordo

Noun

The

monomer

constituting

DNA

or

RNA

biopolymer

molecules

.

Each

nucleotide

consists

of

a

nitrogenous

heterocyclic

base

(

or

nucleobase

),

which

can

be

either

a

double-ringed

purine

or

a

single-ringed

pyrimidine

;

a

five-carbon

pentose

sugar

(

deoxyribose

in

DNA

or

ribose

in

RNA

);

and

a

phosphate

group

.