1. & E O O
&

2. Chemistry of viruses

3. Chemical nature of virus
Chemical composition of viral particle and the function of each component.

4. Main chemical components
Protein
Nucleic acid
Chemically, viruses are nucleoprotein

5. Viral constituents Protein. Nucleic acid. Lipids. Carbohydrates.
Other chemical components.

6. Viral constituents Protein. Nucleic acid. Lipids. Carbohydrates.
Other chemical components.

8. Functions of protein Protection enzymes Definite shapes Cell fusion
Antigenic determent
Entry of N.A.
Attachment

9. Viral constituents Protein. Nucleic acid. Lipids. Carbohydrates.
Other chemical components.

10. Nucleotide
1. Phosphate
3. Nitrogen base
2. Carbohydrate

11. Phosphate group

12. Pentose sugar

13. Nitrogen bases:
1. Purine
2. Pyrimidine

14. Nucleoside

15. nucleotide

16. Double helix arrangement

18. Types of nucleic acid

19. Function of N.A. Confirmation
Carrier of Genetic information i.e. infection and replication
Confirmation
Smith (1949), Hershy (1952) , Conrat (1956)

21. Conrat confirmation

22. Viral constituents Protein. Nucleic acid. Lipids. Carbohydrates.
Other chemical components.

24. Origin of viral lipids
Plasma membrane
Vacuolar membrane

25. Protection of nucleoprotein
Functions of lipids
Liberation of N.A.
Attachment
Protection of nucleoprotein
i.e. Increasing infectivity

26. Viral constituents Protein. Nucleic acid. Lipids. Carbohydrates.
Other chemical components.

27. Viral constituents Protein. Nucleic acid. Lipids. Carbohydrates.
Other chemical components.

28. Other chemical components
Water
Cations
Polyamines

29. Thanks