Chapter III. Structure and function of Nucleic acid

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Presentation transcript:

Chapter III. Structure and function of Nucleic acid 1. Introduction to common properties of nucleic acid; 2. Structure and properties of DNA 3. Structure and properties of RNA

RNA: expression of genetic information 1) Nucleic acids are classified into two groups: DNA and RNA with different functions: DNA: storage and carrier of genetic information RNA: expression of genetic information

2). Both DNA and RNA are composed of nucleotides base + ribose(deoxyribose) Nucleotide= Nucleoside + phosphate

How to write simple formula of nucleic acids

1. 2. 5‘p TpApCpG-OH 3’

3). Nucleic acids have 260nm absorbance

Phosphate group Base Sugar Purines Primidines H OH

Phosphodiester bond Glycosidic linkage Base Phosphate group Sugar

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