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प्रश्न
Explain how the biochemical characterisation (nature) of 'Transforming Principle' was determined, which was not defined from Griffth's experiments.
उत्तर
Biochemical characterisation of transforming principle was determined by Oswald Avery, Colin Macleod, and Maclyn McCarty. They conducted a series of experiments to test the biochemical nature of genetic material. They purified various biochemicals (proteins, DNA, RNA, etc) from the heat-killed S cells to check which ones can transform the live R cells into S cells
These series of experiments suggested that DNA alone could transform the R cells into S cells. Thus they concluded that DNA is the hereditary material.
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संबंधित प्रश्न
Answer the following questions based on Hershey and Chases's experiments:
(a) Name the kind of virus they worked with and why?
(b) Why did they use two types of culture media to grow viruses in ? Explain.
(c) What was the need for using a blender and later a centrifuge during their experiments?
(d) State the conclusion drawn by them after the experiments.
Give one significant contribution of the given scientists
H. Boyer
Hershey and Chase experiment with bacteriophage showed that ____________.
The two strands of DNA are held together by ______.
Nucleotide arrangement in DNA can be seen by ______.
During infection of E. coli cells by bacteriophage T2, ______.
The process of transformation is not affected by which of the following enzymes?
- DNase
- RNase
- Peptidase
- Lipase
Identify the compound chemical structure is shown below. State any three of its physical properties.
Which of the following methods of reproduction in bacteria involves participation of a virus?
Define transformation in Griffith's experiment. Discuss how it helps in the identification of DNA as the genetic material.
