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Viral replication is the formation of biological viruses during the infection process in the target host cells. Viruses must first get into the cell before viral replication can occur. Through the generation of abundant copies of its genome and packaging these copies, the virus continues infecting new hosts. Replication between viruses is ...
To enter the cells, proteins on the surface of the virus interact with proteins of the cell. Attachment, or adsorption, occurs between the viral particle and the host cell membrane. A hole forms in the cell membrane, then the virus particle or its genetic contents are released into the host cell, where replication of the viral genome may commence.
Transcription is believed to occur in the core particles. The core releases viral DNA and forms a cytoplasmic replication factory where DNA replication begins and transcription of late genes occurs. The replication factory forms around the viral core and expands until it occupies a large fraction of the amoeba cell volume. Later stages of the ...
Ultrastructure of Bodo saltans virus particles and its replication [ 18 ] Viruses in Mimiviridae have icosahedral and round geometries, with between T=972 and T=1141, or T=1200 symmetry. The diameter is around 400 nm, with a length of 125 nm.
A viral infection does not always cause disease. A viral infection simply involves viral replication in the host, but disease is the damage caused by viral multiplication. [5] An individual who has a viral infection but does not display disease symptoms is known as a carrier. [17] Mechanisms by which viruses cause damage and disease to host cells
The Marseilleviridae viruses have double stranded DNA genomes that are about 368 kilobases long. Members of the family can have about 457 open reading frames (ORFs) in its genome. The host organisms are amoebae. Once it infects, viral replication takes place in virus factories in the cytoplasm.
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(A) When the host cell is only infected by a giant virus, the latter establishes a cytoplasmic virus factory to replicate and generates new virions, and the host cell is most likely lysed at the end of its replication cycle. (B) When the host cell is co-infected with a giant virus and its virophage, the latter parasitizes the giant virus factory.