Which of the following organic molecules contains both an $\mathrm{amine}$ group and a $\mathrm{carboxyl}$ group?

• A. $\mathrm{Glycine}$
• B. $\mathrm{Acetic}\mathrm{acid}$
• C. $\mathrm{Acetone}$
• D. $\mathrm{Aniline}$

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the functional groups involved. An amine group is characterized by the presence of a nitrogen atom bonded to hydrogen(s) or carbon(s), typically written as \(\mathrm{-NH_2}\) or derivatives. A carboxyl group is a carbon double bonded to oxygen and also bonded to a hydroxyl group, written as \(\mathrm{-COOH}\).
2. Step 2: Analyze each molecule to identify these groups. Glycine is an amino acid, which by definition contains both an amine group (\(\mathrm{-NH_2}\)) and a carboxyl group (\(\mathrm{-COOH}\)).
3. Step 3: Check Acetic acid, which contains a carboxyl group (\(\mathrm{-COOH}\)) but does not have an amine group.
4. Step 4: Examine Acetone, which is a ketone with a carbonyl group (\(\mathrm{C=O}\)) but neither an amine nor a carboxyl group.
5. Step 5: Look at Aniline, which contains an amine group attached to a benzene ring but lacks a carboxyl group.