Which of the following statements about functional groups is TRUE?

Question

Lipids and proteins are functional groups.
Amino and carboxyl are functional groups.
DNA and RNA are functional groups.

Answer 1

The statement that is TRUE is:

Amino and carboxyl are functional groups.

Amino groups (-NH2) and carboxyl groups (-COOH) are indeed recognized as functional groups in organic chemistry, commonly found in amino acids and many other biological molecules.

The other statements are false because:

• Lipids and proteins are not functional groups; they are large biomolecules composed of various smaller building blocks (e.g., lipids are made of fatty acids and glycerol; proteins are made of amino acids).
• DNA and RNA are types of nucleic acids, not functional groups. They are complex molecules made up of nucleotides, which contain functional groups, but the molecules themselves are not classified as functional groups.