E. Coli about to replicate was placed in a medium containing radio active thymidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observation shall be correct: -

Question

E. Coli about to replicate was placed in a medium containing radio active thymidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observation shall be correct: - (A) Both the strands of DNA will be radio active (B) One strand radio active (C) Each strand half radio active (D) None is radio active

Tardigrade Admin · Accepted Answer

Since DNA replication is semiconservative, the newly synthesized strand of DNA would be normal while the strand obtained from parent molecule would be radioactive.

Q. E. Coli about to replicate was placed in a medium containing radio active thymidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observation shall be correct : -

Both the strands of DNA will be radio active

One strand radio active

Each strand half radio active

None is radio active

Since DNA replication is semiconservative, the newly synthesized strand of DNA would be normal while the strand obtained from parent molecule would be radioactive.