Question

multiple choice question which molecule is most likely to contain methyl groups? purines nucleic acids fats

Explanation:

Fats are composed of fatty - acid chains and glycerol. Fatty - acid chains often have methyl groups ($-CH_3$) at one end. Purines are nitrogen - containing heterocyclic compounds in nucleic acids and do not typically have methyl groups as a prominent feature. Nucleic acids are polymers of nucleotides and do not have methyl groups as a characteristic structural feature like fats do.

Answer:

C. Fats