DNA vs RNA: blueprint vs messenger of life
THE D NA acidic substance prensent in nucleas was first identify by friedrich in 1869 he named it nuclien . altman did complete study .identify acidic nature called nucleic acid. . DNA is long polymer chain of deoxy ribonucleiotides .length of DNA Is defined number of nucleotide . structure of polynucleotide chain nucleotide contain : pentose sugar + nitrogenous base + phosphate pentose sugar are two types : deoxyribose sugar and ribose sugar .nitrogenous base such as -[adenine , guanine, cytocin, uracil, thymine, ] . in case of DNA A,G,T,C. in case of RNA A,G,C,U. . thymine are also known as 5methyl uracil . DOUBLE HELIX STRUCTURE OF DNA . in 1953 james wattson and francis crick based on the X ray diffrence data produced by rosalind franklin proposed double helix structure of DNA . through X ray crystallography obtained a very fine picture of DNA . . its was suggested that ...