Percentage of Se (at. mass \(=78.4)\) in peroxidase anhydrase enzyme is \(0.5 \%\) by weight, then minimum…

Percentage of Se (at. mass \(=78.4)\) in peroxidase anhydrase enzyme is \(0.5 \%\) by weight, then minimum molecular mass of peroxidase anhydrase enzyme is
  1. \(1.576 \times 10^4\)
  2. \(1.576 \times 10^3\)
  3. 15.76
  4. \(2.136 \times 10^4\).

Solution

The enzyme must contain at least one atom of Se. $\because \quad 0.5 \mathrm{~g}$ of Se is present in $100 \mathrm{~g}$ of enzyme $\therefore \quad 78.4 \mathrm{~g}$ of Se will be present in $=\frac{100 \times 78.4}{0.5}$ $=1.576 \times 10^4 \mathrm{~g}$ of enzymes

Asked in: NEET 2009 (Screening)

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