Question:
Which from following amino acids contains sulfur in it's side chain?
Which from following amino acids contains sulfur in it's side chain?
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Remember: Cys & Met → sulfur-containing amino acids.
Updated On: May 4, 2026
- Tyrosine
- Threonine
- Cysteine
- Lysine
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The Correct Option is C
Solution and Explanation
Concept:
Some amino acids contain sulfur in their side chains:
• Cysteine (\(-SH\) group)
• Methionine (thioether group)
Step 1: Analyze options.
• Tyrosine → phenolic group $\times$
• Threonine → alcohol group $\times$
• Cysteine → contains \(-SH\) (sulfur) \checkmark
• Lysine → basic amino acid $\times$ Conclusion: \[ \text{Sulfur-containing amino acid = Cysteine} \]
Some amino acids contain sulfur in their side chains:
• Cysteine (\(-SH\) group)
• Methionine (thioether group)
Step 1: Analyze options.
• Tyrosine → phenolic group $\times$
• Threonine → alcohol group $\times$
• Cysteine → contains \(-SH\) (sulfur) \checkmark
• Lysine → basic amino acid $\times$ Conclusion: \[ \text{Sulfur-containing amino acid = Cysteine} \]
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