Question
A decapeptide (Mol.wt 796) on complete hydrolysis gives glycine(Mol.wt 75) , alanine and phenylalanine. Glycine contributes 47 % to the total weight of the hydrolysed products . The number of glycine units present in the decapeptide is
Joshi sir comment
47 % of (796+162) = 958*47/100 = 450 approx
so no of glycene units = 450/75 = 6 approx
here 162 is taken for the weight of 9 water molecules required for breaking the decapeptides.