1.2 Molecular Genetics The Discovery of DNA:The general structure of nucleic acids were found by the end of the 19th century Composition of Genes:In 1944,Avery and his colleagues demonstrated that genes are composed of nucleic acids
1.2 Molecular Genetics ✓The Discovery of DNA: The general structure of nucleic acids were found by the end of the 19th century ✓Composition of Genes: In 1944, Avery and his colleagues demonstrated that genes are composed of nucleic acids
The Deiscovery of DNA The general structure of nucleic acids were found In 1869 by Friedrich Miescher discoved nuclein(核素)：Deoxyribonucleic acid(脱氧核糖核酸，DNA), Rribonucleic acid(核糖核酸，RNA)and a little protein. -Long polymers or chains of nucleotides(核苷). -Nucleotides are linked by sugars through phosphate groups Nuclein Chromosome a string of genes DNA RNA Proteins It must be composed Which polymer? of a polymer
The Deiscovery of DNA Nuclein DNA RNA Proteins Chromosome It must be composed of a polymer a string of genes Which polymer？ The general structure of nucleic acids were found In 1869 by Friedrich Miescher discoved nuclein (核素) :Deoxyribonucleic acid(脱氧核糖核酸,DNA) , Rribonucleic acid(核糖核酸,RNA) and a little protein. –Long polymers or chains of nucleotides (核苷). –Nucleotides are linked by sugars through phosphate groups
The Composition of Genes In 1944,Oswald Avery and his colleagues demonstrated that genes are composed of nucleic acids. No virulent The transforming substance is DNA Live R strain Effect Virulent Heat-killed S strain Live S and R strains How do genes work? isolated from dead
The Composition of Genes In 1944, Oswald Avery and his colleagues demonstrated that genes are composed of nucleic acids. How do genes work? No virulent Virulent The transforming substance is DNA