M.Sc. Bio-Physics (PU-CET P.G) 2018 Panjab University Entrance Exam With Answers

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51.

Isotopes can be used in studies of metabolic pathways because :-

A: Their half-life allows a researcher to time an experiment.
B: They are more reactive.
C: The cell does not recognize the extra proteins in the nucleus, so isotopes are readily used in metabolism.
D: Their location or quantity can be experimentally determined because of their radioactivity

The answer is: D