Virus
BY : MARIFER ;)
Rmz
Because the active reproduce raplider and the other one slowly
It reproduce the same !
What are the steps of the active viral replication
STEP 1
Attachment. This is the first step in viral replication. Surface
proteins of the virus interact with specific receptors on the target cell
surface. These may be specialized proteins with limited distribution or
molecules that are more widely distributed on tissues throughout the
body. The presence of a virus-specific receptor is necessary but not
sufficient for viruses to infect cells and complete the replicative cycle.
Step 2
Penetration. Enveloped viruses
penetrate cells through fusion of the viral envelope with the host cell
membrane. Non-enveloped viruses penetrate cells by translocation of the
virion across the host cell membrane or receptor mediated endocytosis of
the virion in clathrin coated pits with accumulation of viruses in
cytoplasmic vesicles
STEP 4
Transcription and Translation. The key to understanding the
genomic expression of viruses is noting the fact that viruses must use
host cellular machinery to replicate and make functional and structural
proteins. Strategies for genomic expression for different taxonomic
groupings of viruses are described below
STEP 5
Assembly and Release. The process of virion assembly involves
bringing together newly formed viral nucleic acid and the structural
proteins to form the nucleocapsid of the virus.
Thanks for watching :)
STEP 3
Uncoating (disassembly). A complex process which differs by
taxonomic class and is not fully understood for many agents. This
process makes the nucleic acid available for transcription to permit
multiplication of the virus.