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Transformation was discovered by: [2014]
- a)Meselson and Stahl
- b)Hershey and Chase
- c)Griffith
- d)Watson and Crick
Correct answer is option 'C'. Can you explain this answer?
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Transformation was discovered by: [2014]a)Meselson and Stahlb...
(c) Frederick Griffith (in 1928), a British Medical officer described the phenomenon of bacterial transformation. He carried out experiment with Streptococcus pneumoniae (bacterium causing pneumonia) which is used to infect mice. By using S Strain (heat killed) and R strain (live) it was concluded that R strain has been transformed by some material of S strain which makes R strain virulent and enable to synthesize smooth polysachharide.
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Transformation was discovered by: [2014]a)Meselson and Stahlb...
Griffith's Experiment and the Discovery of Transformation:
- In 1928, Frederick Griffith conducted an experiment on Streptococcus pneumoniae, a bacterium that causes pneumonia in mammals.
- He worked with two strains of the bacteria: a virulent (pathogenic) strain that produced smooth colonies on a growth medium and a non-virulent (non-pathogenic) strain that produced rough colonies.
- Griffith injected mice with each strain separately and found that the mice injected with the virulent strain died, while those injected with the non-virulent strain survived.
- He then mixed heat-killed virulent strain bacteria with live non-virulent strain bacteria and injected the mixture into mice. Surprisingly, the mice died.
- Griffith discovered that something in the dead virulent bacteria had transformed the live non-virulent bacteria into a virulent form. He called this phenomenon transformation.
Importance of Griffith's Experiment:
- Griffith's experiment was significant because it provided the first evidence that genetic material could be transferred between cells.
- It also laid the groundwork for subsequent studies on transformation, which helped researchers understand the nature of genetic material and how it is transferred between cells.
Conclusion:
- Therefore, option C, Griffith, is the correct answer to the question.
- In 1928, Frederick Griffith conducted an experiment on Streptococcus pneumoniae, a bacterium that causes pneumonia in mammals.
- He worked with two strains of the bacteria: a virulent (pathogenic) strain that produced smooth colonies on a growth medium and a non-virulent (non-pathogenic) strain that produced rough colonies.
- Griffith injected mice with each strain separately and found that the mice injected with the virulent strain died, while those injected with the non-virulent strain survived.
- He then mixed heat-killed virulent strain bacteria with live non-virulent strain bacteria and injected the mixture into mice. Surprisingly, the mice died.
- Griffith discovered that something in the dead virulent bacteria had transformed the live non-virulent bacteria into a virulent form. He called this phenomenon transformation.
Importance of Griffith's Experiment:
- Griffith's experiment was significant because it provided the first evidence that genetic material could be transferred between cells.
- It also laid the groundwork for subsequent studies on transformation, which helped researchers understand the nature of genetic material and how it is transferred between cells.
Conclusion:
- Therefore, option C, Griffith, is the correct answer to the question.
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Transformation was discovered by: [2014]a)Meselson and Stahlb)Hershey and Chasec)Griffithd)Watson and CrickCorrect answer is option 'C'. Can you explain this answer?
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Transformation was discovered by: [2014]a)Meselson and Stahlb)Hershey and Chasec)Griffithd)Watson and CrickCorrect answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Transformation was discovered by: [2014]a)Meselson and Stahlb)Hershey and Chasec)Griffithd)Watson and CrickCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Transformation was discovered by: [2014]a)Meselson and Stahlb)Hershey and Chasec)Griffithd)Watson and CrickCorrect answer is option 'C'. Can you explain this answer?.
Transformation was discovered by: [2014]a)Meselson and Stahlb)Hershey and Chasec)Griffithd)Watson and CrickCorrect answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Transformation was discovered by: [2014]a)Meselson and Stahlb)Hershey and Chasec)Griffithd)Watson and CrickCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Transformation was discovered by: [2014]a)Meselson and Stahlb)Hershey and Chasec)Griffithd)Watson and CrickCorrect answer is option 'C'. Can you explain this answer?.
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