Which of the following groups represents essential amino acid?

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SSC Selection Post 2024 (Matriculation Level) Official Paper (Held On: 26 Jun, 2024 Shift 1)
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  1. Histidine, isoleucine, leucine, lysine
  2. Alanine, arginine, asparagine, aspartic acid
  3. Alanine, isoleucine, leucine, lysine
  4. Glycine, proline, serine, and tyrosine

Answer (Detailed Solution Below)

Option 1 : Histidine, isoleucine, leucine, lysine
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The correct answer is Histidine, isoleucine,leucine,lysineKey Points

  •  The correct group representing essential amino acids is:
    • Histidine, isoleucine, leucine, lysine
  • Essential amino acids are those that cannot be synthesized by the human body and must be obtained through diet.
  • There are nine essential amino acids:
    • Histidine
    • Isoleucine
    • Leucine
    • Lysine
    • Methionine
    • Phenylalanine
    • Threonine
    • Tryptophan
    • Valine

Additional Information

  • Alanine, arginine, asparagine, aspartic acid – None of these are essential.
    • While arginine is conditionally essential (for certain groups), the others are non-essential.
  • Alanine, isoleucine, leucine, lysine – Alanine is not essential, though the others (isoleucine, leucine, lysine) are.
  •  Glycine, proline, serine, tyrosine – These are all non-essential amino acids.
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