The nucleotide of dna is one large molecule composed of three smaller molecules. which of the following sets of molecules bond together to form a nucleotide?
a.a purine, a pyrimidine, and a five-carbon sugar
b.adenine, thymine, and cytosine
c.a nitrogen atom, a phosphate atom, and a five-carbon sugar
d.deoxyribose, a nitrogen base, a phosphate group

The correct answer is D) deoxyribose, a nitrogen base, a phosphate group.

DNA ( deoxyribonucleic acid) is made up of small units called nucleotide ( monomer of DNA). A nucleotide of DNA consists of three smaller molecules that is a nitogenous base (adenine, guanine, thymine, and cytosine), deoxyribose sugar ( 5 -carbon sugar) and a phosphate group. Nitrogenous base is joined to sugar through glycosidic bond whereas phosphate group is joined to sugar via ester bond.

Nucleotides are joined together through phosphodiester bond and form large molecule of DNA.

Nitrogen-fixing bacteria convert nitrogen in the atmosphere into ammonia for plants to use. They live in the roots of plants called legumes.