Which of the following is the correct structu | vedclass

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Question

(A) Cysteine is a sulfur-containing amino acid with the chemical formula $C_3H_7NO_2S$. Its structure consists of an amino group $(-NH_2)$,a carboxyl

Vedclass · Accepted Answer

$HS-CH_2-CH(NH_2)-COOH$

Vedclass · Answer

(A) Cysteine is a sulfur-containing amino acid with the chemical formula $C_3H_7NO_2S$. Its structure consists of an amino group $(-NH_2)$,a carboxyl group $(-COOH)$,and a side chain ($R$-group) containing a thiol group $(-SH)$. The specific side chain for cysteine is $-CH_2SH$. Therefore,the complete structure is $HS-CH_2-CH(NH_2)-COOH$,which corresponds to option $A$.

Column-$I$ (Protein)	Column-$II$ (Function)
$P$. Collagen	$I$. Hormone
$Q$. Trypsin	$II$. Sensory receptor
$R$. Insulin	$III$. Fights infectious agents
$S$. Antibody	$IV$. Enzyme
$T$. Receptor	$V$. Intercellular ground substance
$U$. $GLUT-4$	$VI$. Enables glucose transport into cells

Which of the following is the correct structure of the amino acid cysteine?

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