Answer:
(D) They are all acids
Step-by-step explanation:
Amino acids are monomers, fatty acids are polymers and they do not contain nitrogen. All four are acidic in nature for different reasons:
- Amino acids due to acidic carboxyl group -COOH.
- Fatty acids due to end chain acidic carboxyl group -COOH.
- Nucleotides because they have phosphate groups (which are acidic in nature).
- Monosaccharides due to presence of aldehyde group -CHO (which can oxidise to -COOH).