Question

Identify basic amino acid from following

• A. Phenylalanine
• B. Histidine
• C. Alanine
• D. Serine

Hint:

Basic amino acids include histidine, lysine, and arginine due to basic side chains.

Answer 1

The Correct Option is B

Step 1: Classification of amino acids.
Amino acids are classified as acidic, basic, or neutral based on the nature of their side chains. Basic amino acids contain an additional basic group in their side chain.

Step 2: Analysis of histidine.
Histidine contains an imidazole ring in its side chain, which can accept a proton and thus shows basic character.

Step 3: Elimination of other options.
Phenylalanine, alanine, and serine do not possess basic functional groups in their side chains and are therefore neutral amino acids.

Step 4: Conclusion.
Hence, the basic amino acid among the given options is Histidine.