Question

A protein ion with a molecular weight of 10,000 Daltons carried a charge of 5+ and was subjected to mass spectrometric analysis. Calculate its mass to charge ratio.

• A. 2001
• B. 2000
• C. 2501
• D. 5001

Hint:

For calculations involving mass-to-charge ratios, make sure you use the right method, and also do the calculation carefully to prevent errors.

Answer 1

The Correct Option is B

Mass to Charge Ratio: The mass-to-charge ratio (m/z) is calculated by dividing the mass of an ion (in Daltons) by its charge. Given the molecular weight of the protein ion = 10,000 Daltons and the charge of the protein ion = 5+, the mass-to-charge ratio = (10,000 Daltons)/5 = 2000.