NEET 2017
- Exam
- NEET
- Year
- 2017
- Subject
- Zoology
- Chapter
- Molecular Basis of Inheritance
NEET 2017 · Zoology · Molecular Basis of Inheritance
The final proof for DNA as the genetic material came from the...
The final proof for DNA as the genetic material came from the experiments of
Options
- AGriffith
- BHershey and Chase
- CAvery, Mcleod and McCarty
- DHargobind Khorana
Correct answer
B. Hershey and Chase
Step-by-step solution
The final proof that DNA is the genetic material came from the experiments of Alfred Hershey and Martha Chase (1952). Griffith's experiment proved the existence of genetic material while Avery, MacLeod and McCarty worked to determine the biochemical nature of transforming principle.
Concept enhancer Hershey and Chase during their experiment grew viruses in two mediums, one containing 32P and other 35S, when these were allowed to infect bacteria, they observed that viruses containing 32P DNA were radioactive while those with 35S protein were not radioactive. Hence, DNA not protein coat entered bacterial cells from viruses.
Concept enhancer Hershey and Chase during their experiment grew viruses in two mediums, one containing 32P and other 35S, when these were allowed to infect bacteria, they observed that viruses containing 32P DNA were radioactive while those with 35S protein were not radioactive. Hence, DNA not protein coat entered bacterial cells from viruses.