1.

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 decapeptides is

Answer»


Solution :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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