Question

Which major concept of genetics was illustrated in the experiment by Hershey and Chase?

• A. DNA exhibits a double helix structure.
• B. DNA was the molecule of heredity.
• C. DNA copies itself through semiconservative replication.
• D. Amino acids may have been the first biological molecules formed on Earth.

Answer 1

The correct option is B DNA was the molecule of heredity.

Hershey and Chase did the experiment with radioactively labelled sulphur and phosphate and then inserted them in the bacteria with the help of bacteriophages. they found that the genetic material of the bacteria that were infected by the bacteriophages wit radioactively labelled phosphates had that radioactively labelled phosphate in their genetic material but not sulphur. As the DNA contains phosphates and not the protein. This proved that DNA was the genetic material.

So, the correct option is 'DNA was the molecule of heredity.