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Viruses

biology4

QuestionAnswer
how is the structure of the viruses? non-cellular
which protein has the viruses ? capsid
Inside the capsid there are... DNA/ sometimes RNA
Replication As viruses are not cells , the term replication is uses instead of reproduction. Viruses can,t replicate themselves; They only multiply by using the energy and structures of a live host cell. For this reason viruses are said to be obligate parasites.
What is bacteriophage? Is a virus that infects bacteria
Stage in virus replication Attachment, entry, synthesis, assembly and release
What is attachment? The viruses attaches to the host cell
What is entry? Viral nucleic acid is pushed through
What is synthesis? The host nucleic acid(DNA) is made inactive. The viral nucleic acid uses the host´s organelles to produce new viral nucleic acid and proteins
What is assembly? New viruses are made inside the host cell
What is release? The bursting of the host cell is called lysis
Disavantages of viruses Human, plant and animal diseases
Human diseases Common colds, influenza, mumps,measles, chickenpox, AIDS
Plant diseases Tobacco mosaic
Animal diseases Foot and mouth, rabies
Benefits of viruses Viruses are sometimes used to transfer genes from one organism to another in genetic engineering. Such viruses are called vectors
... are produced to diseable viruses Antibodies
... kill bacteria but NOT affect viruses Antibiotics
Created by: ppsaura
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