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Viruses Viruses
[object Object],Viruses are tiny,  they are smaller than the smallest bacteria . Red blood cell 7500 nm
[object Object],[object Object],[object Object]
Are viruses living things?
A virus  CAN   REPRODUCE  inside a cell that serves as a  HOST . A HOST is a living thing that a  virus  or  parasite  lives on  or  in.
So viruses force the host´s cells to make viruses instead of healthy new cells. You need to remember that cells can produce all their structures, so in certain way they are like tiny factories.
 
- Viruses The Lytic Cycle
Classifying Viruses
Based on their Nucleic Acids: RNA Viruses DNA Viruses
1 chain  formed  by  nucleotides 1 helix 2 chains  formed  by  nucleotides 2 helix
Based on their SHAPE
CRYSTAL
CYLINDER
SPHERES
SPACECRAFT
NEW MICROSCOPY TECHNOLOGY
avian influenza RNA virus CYLINDER
CYLINDER Tobacco mosaic virus (RNA virus)
Hepatitis B virus  (DNA virus)  CRISTALS
Polio virus; RNA virus. CRISTALS
SPHERES HIV Virus (RNA virus)
SPHERES HIV infection
SPHERES HIV infection
Variola  virus,  the cause of  smallpox  (DNA virus) SPHERES
Influenza A virus  (RNA virus) SPHERES
T4 bacteriophage (DNA virus). SPACECRAFT
Bacteriophage (DNA virus)  SPACECRAFT

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