Neet Very Important Points of NCERT

 

💥Very Important Points of NCERT ❤️:  


🌟1. Genetic map discovered by Alfred Sturtevent. 

🌟 2. Henking trace a specific nuclear structure (X-body) all through spermatogenesis in a few insects (1891). 

🌟3. Down’s syndrome was first described by Langdon Down (1866) 

🌟4. DNA (Nuclein) was first identified by Friedrich Meischer (1869). 

🌟 5. X-ray diffraction data produced by Wilkins & Franklin. 

🌟 6. Transforming principle was given by Griffith (1928). 

🌟 7. Biochemical characterisation of transforming principle was given by 

Avery, MacLeod & Mc Carty. 

🌟 8. Unequivoal proof that DNA is the genetic material came from the 

experiements of Hershey & Chase (1952). 

🌟 9. Replication scheme was given by Watson & Crick. 

🌟 10. Central dogma of biology was given by Crick. 

🌟 11. The experimental proof that DNA replicates semiconservatively was 

given in prokaryotes by Meselson & Stahl (1958). 

🌟 12. The experimental proof that DNA replicates semiconservatively was 

given in eukaryotes by Taylor (1958). 

🌟 13. George Gamow (a physicist) proposed that codon was triplet. 

🌟14. Har Gobind Khorana synthesizes RNA molecules with defined 

combination of bases (homopolyers & copolymers). 

🌟 15. Nirenberg in cell-free system for protein synthesis finally helped the 

code to be deciphered. 

🌟 16. Polynucleotide phosphorylase is called Severo Ochoa enzyme 

🌟 17. Lac operon was given by Jacob & Monad. 

🌟 18. Automated DNA sequencers worked on the principle of a method 

developed by Frederick Sanger 

🌟 19. Frederick Sanger developed the method for determination of amino 

acid sequences in proteins. 

🌟 20. DNA fingerprinting technique was developed by Alec Jeffreys. 

🌟 21. Spontaneous generation theory was dismissed by Louis Pasteur. 

🌟 22. Life comes from pre-existing life it is told by Louis Pasteur. 

🌟 23. Oparin & Haldane proposed that the first form of life could have come from pre-existing non-living organic molecules.