Question

A protein ‘A’ contains 0.30% of glycine (molecular weight 75). The minimum molar mass of the protein ‘A’ is _______ × 103 g mol–1 [nearest integer]

Answer 1

0.3% glycine means

100 g protein ‘A’ contains 0.3 g glycine.

Since, molar mass of glycine is 75.

75 g glycine will be present in

$\frac{100}{0.3}×75\,g$

protein

Minimum molar mass of protein A is 25 × 103 g/mol