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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 reasons for the following:
The genetic code is 'universal'
Define Frameshift mutations
How did Hershey and Chase prove that DNA is the genetic material?
State the 'Central dogma' as proposed by Francis Crick. Are there any exceptions to it? Support your answer with a reason and an example.
(a) Why did Hershey and Chase use radioactive 32P and 35S in their experiments? Explain.
(b) Following the experiments conducted by them, write what conclusion did they arrive at and how ?
The transforming principle of Pneumococcus as found out by Avery, MacLeod, and McCarty was ______.
Identify the compound chemical structure is shown below. State any three of its physical properties.
Who revealed biochemical nature of the transforming principle? How was it done?
Griffith conducted a series of experiments on mice with two different strains of the bacterium Diplococcus pneumoniae.
- Describe the entire procedure for this experiment.
- Write the conclusion of this experiment.
- What would have been the result of the experiment if both strains of bacteria were first heat-killed, mixed and then injected in the mice?
