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Total nitrogen measurement can be used to measure ____________

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Total nitrogen measurement can be used to measure ____________

(a) pH drift

(b) total protein

(c) specific enzyme

(d) viscosity

I have been asked this question in an interview.

This is a very interesting question from Protein Techniques topic in division Techniques in Cell Biology of Cell Biology

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Correct option is (b) total protein

Easiest explanation: Proteins are made up of amino acids which have a carbon and a nitrogen end. The nitrogen molecule takes part in the peptide bond formation thus the nitrogen content is an intrinsic property of protein. Therefore nitrogen count can help in estimation of protein content in a sample.

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