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Viruses PowerPoint Presentation

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Description : Check out this medical titled "Viruses”.

This medical is about viruses, small infectious agents that can only replicate inside the cells of other organisms. Viruses are not considered alive because they cannot carry out any metabolic activities on their own and require a host cell to reproduce. They are composed of genetic material (DNA or RNA) enclosed in a protein coat called a capsid.

When a virus infects a host cell, it uses the hosts cellular machinery to replicate its genetic material and produce new virus particles. Some viruses can cause diseases in humans, animals, and plants, while others do not cause any harm.

The study of viruses is called virology, and it is a field of microbiology. Scientists have identified thousands of different viruses, and many viral diseases have been successfully treated or prevented with vaccines. However, viruses can mutate rapidly, which can make them difficult to control or treat.

Tags : Virus, infectious agents, Infectious Disease, Infectious Disease

Published on : Jun 01, 2023 | Views : 602 | Downloads : 1

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Slide 1-

Viruses
Slide 2-

What is a virus? ‘Infectious particle’ Genetic material Protein coat
Slide 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
Slide 4-

Basic virus structure
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DNA RNA OR Basic virus structure DNA RNA OR
Slide 6-

DNA RNA OR + Basic virus structure DNA RNA OR +
Slide 7-

DNA RNA OR + Capsid Protein Basic virus structure DNA RNA OR + Capsid Protein
Slide 8-

DNA RNA OR + Capsid Protein Basic virus structure DNA RNA OR + Capsid Protein
Slide 9-

Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA OR + Capsid Protein
Slide 10-

Basic virus structure DNA RNA + Capsid Protein Nucleocapsid DNA RNA OR + Capsid Protein
Slide 11-

Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein =
Slide 12-

Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein = +
Slide 13-

Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein = + Lipid membrane Glycoproteins
Slide 14-

Basic virus structure DNA RNA OR + Capsid Protein Nucleocapsid DNA RNA + Capsid Protein = + Lipid membrane Glycoproteins Enveloped virus
Slide 15-

Capsid symmetry Icosahedral Helical
Slide 16-

Attachment
Slide 17-

Attachment: tropism Lock and key
Slide 18-

Penetration
Slide 19-

Disassembly
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Viral genome Disassembly
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mRNA Viral genome Viral enzymes Transcription
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mRNA Viral proteins Viral enzymes Viral genome Translation
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mRNA Viral proteins Viral genome Genome replication
Slide 24-

mRNA Viral proteins Assembly
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mRNA Viral proteins Viral genome Assembly
Slide 26-

Release
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Retroviruses
Slide 28-

Outcome of cellular infection
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Immune response Cell mediated immunity Important in the recovery from viral illness Antibodies Important in the protection from repeat exposure
Slide 30-

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