Which of the following techniques use radioactive precursors for observing metabolic activities of macromolecules?
A
Chromatography
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B
Density gradient centrifugation or cell fractionation
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C
Autoradiography
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D
Electron microscope
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Solution
The correct option is C Autoradiography Autoradiography is the technique used to study metabolic activities of macromolecules. Radioactive elements like nitrogen or phosphorous are used to radioactively label the macromolecules. The changes in pattern of emission of radioactive rays at different time intervals reveals metabolism of the labeled macromolecule.