Question

Which among the following amino acids has lowest molar mass?

Options

• Arginine

• Aspartic acid

• Asparagine

• Alanine

Answer 1

Alanine

Explanation:

Alanine has the smallest molecular mass, with the chemical formula C₃H₇NO₂. It is the second most basic α-amino acid after glycine. Because alanine's methyl side chain is non-reactive, it is rarely directly involved in protein activity.

               Alanine
(Molar mass = 89.09 g/mol)