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

Q: 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

c M.wt of Decapeptide $=796 g / mol$ Total bonds to be hydrolysed $=(10-1)=9$ per molecule. Total weight of $H _2 O$ added $=9 \times 18=162 g / mol$. Total wt. of hydrolysis product $=796+162=958 g$ Total wt. of glycine in product $=\frac{958 \times 47}{100} g=450 g$ Molecular wt. of glycine $=75 g / mol$. Number of glycine $=\frac{450}{75}=6$.

SECTION - A [CHEMISTY - MCQ]

GSEB - English Medium

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

A$4$
B$5$
C$6$
D$7$

IIT 2011, Difficult

STD 11 Science
JEE
STD 12 - 10. Biomolecules
Chemistry

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