Most biomolecules contain nitrogen. which functional group contains nitrogen? amino group hydroxyl group carbonyl group

The correct answer is "amino group".

Explanation:

An amino group (−NH2) is a functional group that is comprised of a nitrogen atom attached by single bonds to hydrogen atoms. Nitrogen is the principal element of the amino group. Amino groups are very important for being an essential functional group for amino acids, the individual elements that form all the proteins.