Question

Which among the following amino acids has the lowest molecular mass?

• A. Proline
• B. Aspartic acid
• C. Serine
• D. Glycine

Hint:

Glycine is the simplest and smallest amino acid, often considered the backbone of proteins.

Answer 1

The Correct Option is D

Step 1: Recall structure of amino acids.
Glycine is the simplest amino acid with only a hydrogen atom as its side chain.
Step 2: Compare molecular masses.
Proline, aspartic acid, and serine contain larger side chains and additional functional groups, increasing their molecular masses.
Step 3: Conclusion.
Therefore, glycine has the lowest molecular mass among the given amino acids.