Q. Assertion: Viruses grown on radioactive sulfur medium contain radioactive DNA. Reason: Sulfur is an integral component of viral DNA.
A) Both assertion and reason are true and reason is the correct explanation of assertion.
B) Both assertion and reason are true but reason is not correct explanation of assertion.
C) Assertion is true, but reason is false.
D) Both assertion and reason are false.
Explanation
Viruses grown on radioactive sulfur medium do not contain radioactive DNA as sulfur is not found in DNA. Instead, it is found in the protein coat. Thus, the protein coat of virus would be radioactive if it is grown on radioactive sulfur medium.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.