💥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.