Question:
Identify the basic amino acid from the following:
Identify the basic amino acid from the following:
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Basic amino acids: Arginine, Lysine, Histidine.
Updated On: Jun 19, 2026
- Arginine
- Glycine
- Alanine
- Serine
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The Correct Option is A
Solution and Explanation
Step 1: Understanding amino acid classification.
Amino acids are classified as acidic, neutral, or basic depending on the nature of their side chain (R group).
Step 2: Identifying basic amino acids.
Basic amino acids contain extra amino groups in their side chain, which can accept protons and show basic behavior.
Step 3: Evaluating arginine.
Arginine contains a guanidino group in its side chain, which is strongly basic in nature due to resonance stabilization after protonation.
Step 4: Evaluating other options.
Glycine, alanine, and serine have neutral side chains and do not exhibit basic character.
Step 5: Final conclusion.
Thus, among the given options, only arginine is a basic amino acid.
Final Answer: \[ \boxed{\text{Arginine}} \]
Amino acids are classified as acidic, neutral, or basic depending on the nature of their side chain (R group).
Step 2: Identifying basic amino acids.
Basic amino acids contain extra amino groups in their side chain, which can accept protons and show basic behavior.
Step 3: Evaluating arginine.
Arginine contains a guanidino group in its side chain, which is strongly basic in nature due to resonance stabilization after protonation.
Step 4: Evaluating other options.
Glycine, alanine, and serine have neutral side chains and do not exhibit basic character.
Step 5: Final conclusion.
Thus, among the given options, only arginine is a basic amino acid.
Final Answer: \[ \boxed{\text{Arginine}} \]
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