Question

Which of the following can be observed alongside with radioactive bacterium as a result of centrifugation?

(a) Bacterium starts to produce RNA

(b) Radioactivity can be detected in the supernatant

(c) Bacterium starts to move slow

(d) Radioactivity cannot be detected in the supernatant

I had been asked this question in my homework.

Question is taken from The Genetic Material is DNA in portion Molecular Basis of Inheritance of Biology – Class 12

Answer 1

The correct choice is (d) Radioactivity cannot be detected in the supernatant

Explanation: As a result of the process of centrifugation, a radioactive bacterium will be produced. The virus attached to the bacterium will leave during the process of blending. It will leave after injecting the radioactive material inside the bacterium. So, radioactivity will not be detected in the supernatant.