Thiol group is present in :
Show Hint
- Cytosine
- Cystine
- Cysteine
- Methionine
The Correct Option is C
Solution and Explanation
Cystine is the disulphide dimer of cysteine, containing an -S-S- bond, not a free thiol.
Methionine contains a thioether (-S-CH3) group.
Cysteine, \(\mathrm{HS-CH_2-CH(NH_2)-COOH}\), contains the free -SH (thiol) group.
Answer: (3) Cysteine
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