Percentage of Se (atomic mass = 78.4) in peroxidase anhydrase enzyme is 0.5% by mass, then minimum molecular mass of peroxidase anhydrase enzyme is:

The enzyme must contain at least one atom of Se

$\because$ 0.5 g of ‘Se’ is present in 100g of enzyme,

$$\begin{gathered} \therefore 78.4 \mathrm{g} \mathrm{of} \text{'}\mathrm{Se}\text{'} \mathrm{is} \mathrm{present} \mathrm{in} ---\left(\mathrm{g}\right) \mathrm{of} \mathrm{enzyme}, \\ \mathrm{molar} \mathrm{mass} = \frac{100 \times 78.4}{0.5} = 1.576 \times {10}^4 \mathrm{g} \end{gathered}$$