A hepta peptide of m.wt `529 mu`, is made up of glycine `[m.wt = 7.5 mu]`, Alamine `[m.wt=89 mu]` and valine `[m.wt=117mu]`. On hydrolysis gives corresponding amino acids. If the product mixture contains 35.32% of glycine. The sum of alanine and valine molecules in a molecule of hepta peptide is ..............

Answer

4

Explanation

Heptapeptide hydrolysis gives 7 amino acid molecules
Total molar mass after hydrolysis `= 529+6(18)=637`
Mass of glycine `(637xx35.32)/(100)=225` , No. of molecules of glycine `= (225)/(75)=3`
`therefore` Alanine and valine molecules present in peptide `= 7-3=4`