Which of the following functional groups is not found in naturally occurring proteins or their amino acid building blocks?
A) carboxylic acid
B) alcohol
C) ketone
D) amide
E) amine

Question

Quizplus · Accepted Answer

Ketones are not found in naturally occurring proteins or their amino acid building blocks. The functional groups present in amino acids are carboxylic acid, amine, and amide. While alcohols can also be present in amino acids as side chains, ketones are not commonly found in biological molecules.

Which of the Following Functional Groups Is Not Found in Naturally