Question

In Hershey and chase experiment, if radioactive phosphorus and radioactive sulphur is used simultaneously in culturing viruses and allowed those to infect E.coli then

• A. All the viral particles resulting from infection show radioactive phosphorus and sulphur
• B. only the DNA molecules of viral progeny show radioactivity
• C. only protein coat is radioactive
• D. some viral particles show radioactive DNA and some with radioactive protein coat

Answer 1

The correct option is B

only the DNA molecules of viral progeny show radioactivity

only the DNA molecules of viral progeny show radioactivity as DNA is the genetic material and it is incorporated into bacteria.