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Question

Sulphur containing amino acid is

A
Cysteine
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B
Leucine
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C
Lysine
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D
Valine
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Solution

The correct option is C Cysteine
The protein is made up of the chain of amino acids. There are 20 amino acids which are attached to each other by peptide bonds depending on the code for the protein on the mRNA. The structure of the amino acids contains central carbon atom which is attached to hydrogen, an amino group, a carboxyl group and the R group. The R group differs in different amino acids. There are two amino acids which contain the sulphur atom in the R group, cysteine and methionine.
Thus, the correct answer is option A.

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