virus basic structure and function and various types.ppt

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Indira priyadarsini Amancharla

virus basic structure and function

Education

What is a virus?
‘Infectious particle’
Genetic material
Protein coat

Properties of a virus
• A virus is a very small, infectious, obligate
intracellular parasite
• Virus particles are not living
• Viruses are chemicals, and by themselves cannot
reproduce
• A susceptible and permissive cellular host is
needed for viruses to reproduce
• All viruses must make mRNA that can be
translated by host ribosomes

DNA
RNA
OR
Basic virus structure
DNA
RNA
OR

DNA
RNA
OR + Capsid
Protein
Basic virus structure
DNA
RNA
OR + Capsid
Protein

Basic virus structure
DNA
RNA
OR + Capsid
Protein
Nucleocapsid
DNA
RNA
OR + Capsid
Protein

Basic virus structure
DNA
RNA
+
Capsid
Protein
Nucleocapsid
DNA
RNA
OR
+
Capsid
Protein

Basic virus structure
DNA
RNA
OR
+
Capsid
Protein
Nucleocapsid
DNA
RNA
+
Capsid
Protein =

Basic virus structure
DNA
RNA
OR
+
Capsid
Protein
Nucleocapsid
DNA
RNA
+
Capsid
Protein =
+
Lipid membrane
Glycoproteins

Basic virus structure
DNA
RNA
OR
+
Capsid
Protein
Nucleocapsid
DNA
RNA
+
Capsid
Protein =
+
Lipid membrane
Glycoproteins
Enveloped
virus

mRNA
Viral genome
Viral
enzymes
Transcription

mRNA
Viral
proteins
Viral
enzymes
Viral genome
Translation

mRNA
Viral
proteins
Viral
genome
Genome replication

mRNA
Viral
proteins
Viral genome
Assembly

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virus basic structure and function and various types.ppt

1. Viruses

2. What is a virus? ‘Infectious particle’ Genetic material Protein coat

3. Properties of a virus • A virus is a very small, infectious, obligate intracellular parasite • Virus particles are not living • Viruses are chemicals, and by themselves cannot reproduce • A susceptible and permissive cellular host is needed for viruses to reproduce • All viruses must make mRNA that can be translated by host ribosomes

4. DNA RNA OR Basic virus structure DNA RNA OR

5. DNA RNA OR + Basic virus structure DNA RNA OR +

6. DNA RNA OR + Capsid Protein Basic virus structure DNA RNA OR + Capsid Protein

7. DNA RNA OR + Capsid Protein Basic virus structure DNA RNA OR + Capsid Protein

8. Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA OR + Capsid Protein

9. Basic virus structure DNA RNA + Capsid Protein Nucleocapsid DNA RNA OR + Capsid Protein

10. Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein =

11. Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein = +

12. Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein = + Lipid membrane Glycoproteins

13. Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein = + Lipid membrane Glycoproteins Enveloped virus

14. Capsid symmetry Icosahedral Helical

15. Attachment