Question

Which observation was made by Avery, Macleod, and McCarty?

(a) DNA is a duplex molecule

(b) DNA can be taken up from medium

(c) DNA can denature at high temperatures

(d) DNA is more stable than RNA

This question was posed to me during an interview for a job.

Question is taken from Techniques in portion Techniques in Cell Biology of Cell Biology

Answer 1

Correct answer is (b) DNA can be taken up from medium

To explain: According to the experiments performed by Avery, Macleod, and McCarty; it came to be known that bacterial cells can take up the DNA present in the medium. This formed the basis of cloning plasmids in the bacterial cells.