Which of the following amino acid contains alcohol fuctional group ?
A
Valine
B
Serine
C
Cysteine
D
Alanine
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B
Serine
b The amino acid refers to the group of organic molecules that consist of a basic amino group $\left(- NH _2\right)$, an acidic carboxyl group $(- COOH )$, and an organic $R$ group (or side chain) that is unique to each amino acid. The amino acids differ from each other in the particular chemical structure of their $R$ group and on the basis of the chemical properties of the R-group chain these are broadly classified as hydrophobic and hydrophilic. The Hydroxyl amino acids are hydrophilic, polar and uncharged. Serine is the amino acid's with its R group with a hydroxyl group attached to $a CH _2$ group.
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A decapeptide (Mol. Wt. $796$) on complete hydrolysis gives glycine (Mol. Wt. $75$), alanine and phenylalanine. Glycine contributes $47.0 \%$ to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is