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By: Jodi Cameron and Connor
Replication of a virusStep 1: Attachment (entrance)Virus attaches to the host cellInjects its DNA/RNA into bacteriumStep 2: Synthesis DNA/RNA replicates with bacterium Step 3: AssemblyBacteriophage protein and genetic material
are assembledStep 4: ReleaseViruses are released, host cell dies
Virus Life Cycle
Structure of a virus
Are viruses living?Researchers first discovered agents that behaved like
bacteria but were much smaller and caused diseases such as rabies and foot-and-mouth disease, it became the general view that viruses were biologically "alive.".
This perception changed in 1935 when the tobacco mosaic virus was crystallized and it was shown that the particles lacked the mechanisms necessary for metabolic function.
Once it was established that viruses consist merely of DNA or RNA surrounded by a protein shell, it became the scientific view that they are more complex biochemical mechanisms than living organisms.
http://serc.carleton.edu/microbelife/yellowstone/viruslive.html
Different types of viruses
Herpes
Vaccine
Common virus
Immune systemYour immune system is like an army. To boost your immune system you take a booster or a
vaccine Vaccines are weak or fake version of the virus, so
your body can fight these viruses quicker and easier so when they come encounter with these viruses in full dosses your body will react quickly and send the antibodies to kill the virus.
The reason you take a vaccine is because as soon as you get a virus the doctors can do very little on help fight it.
It is all up to you immune system and its little army called anti bodies.
http://www.guardian.co.uk/science/video/2010/nov/01/immune-system-viruses-cells
VirusesA viruses habitat is a host cellIt contains nucleic acid and a protein capsidThere is no cure for a virus, it can only be
prevented by a vaccine
Pictures of different viruses Herpes Virus
Common Cold Virus
H1N1 Virus
Meningitis Virus
Fun factsThe name virus was coined from the Latin
word meaning slimy liquid or poisonThere are a million virus particles per ml
of seawater – for a global total of 1030 virions! Lined up end to end, they would stretch 200 million light years into space.
The smallest known viruses are circoviruses, which are 20 nanometers (0.00002 millimeters) in diameter. The viral genome is 1,700 nucleotides in length and codes for two proteins.
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