Question

E.coli was infected with bacteriophage having radioactive $\left(S^{35}\right)$ protein in a culture. It was blended, centrifuged and distribution of $S^{35}$ determined. What does the experiment show?

• A. Protein is not the genetic material
• B. $DNA$ is not involved in heredity
• C. Nothing is proved
• D. $DNA$ is the genetic material

Answer 1

The correct option is D $DNA$ is the genetic material

The unequivocal proof that $DNA$ is the genetic material came from the experiments of Alfred Hershey and Martha Chase $\left(1952\right)$. They worked with viruses that infect bacteria called bacteriophages. Their experiment provided that DNA is the genetic material and not the protein.