1. 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

2. 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

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

5. How to write simple formula of nucleic acids

6. 1. 2.
5‘p TpApCpG-OH 3’

7. 3). Nucleic acids have 260nm absorbance

9. Phosphate group
Base
Sugar
Purines
Primidines H OH

10. Phosphodiester bond
Glycosidic linkage
Base
Phosphate
group
Sugar