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Which of the following methods cannot be used to determine the molecular weight of enzymes?

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Which of the following methods cannot be used to determine the molecular weight of enzymes?

(a) Mass spectrometry

(b) Gel filtration

(c) Biosensors

(d) Ultracentrifugation

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The question is from Determination of Molecular Weight of Enzymes in division Enzyme Extraction and Purification of Enzyme Technology

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Right choice is (d) Ultracentrifugation

To explain: Biosensors cannot be used to determine molecular weight of enzymes. But, they are analytical devices which converts a biological response into an electrical signal. Mass spectrometry, gel filtration, ultracentrifugation are the methods used to determine the molecular weight of enzymes.

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