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A decapeptide (Mol. Wt. 769) on complete...

A decapeptide (Mol. Wt. 769) 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.

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The correct Answer is:
6
Mol. Wt. of decapeptide `=796`.
No. of `H_2O` molecules used for hydrolysis of decapeptide `=9`.
i.e., Decapeptide `+9H_2Oto` Glycine + Alanine +Phenylanine
Total wt. of amino acids obtained after addition of 9 molecules of water `=796+9xx18=958`
Total wt. of glycine in the hydrolysed products `=(958xx47)/(100)450.26`
But mol. wt. of glucine `=75`
`therefore ` No. of glycine units in the decapeptide `=(450.26)/(75)=6`
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