(-) sense ssRNA viruses 6. an RNA virus. A virus CANNOT reproduce by itself—it must . Viral Replication: Basic Concepts • Viruses are obligate intracellular parasites • Viruses carry their genome (RNA or DNA) and sometimes functional proteins required for early steps in replication cycle • Viruses depend on host cell machinery to complete replication cycle and must commandeer The genomic size of Co Vs. ranges from approximately 26. to 32 kilobases, the largest for. Viruses do not produce any kind of reproductive structure, they a . are S(spike) –E(envelope) –M (membrane) –N (nucleocapsid) Rna Virus Replication Strategies PPT Presentation Summary : VPg (viral protein genome-linked) is a protein that is covalently attached to the 5′ end of positive strand viral RNA and acts as a … (The virus enters a cell, makes copies. Viral Replication Scott M. Hammer, M.D. RNA or DNA may be ss or ds, ssRNA may be +ve or –ve sense. activities, eventually . Replication of Viruses - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. it. (+) sense ssRNA viruses (codes directly for protein) 5. Co Vs are enveloped viruses. RNA reverse transcribing viruses 7. Viral Nucleic Acid Replication. burst. Most of plant virus infect a limited number of different plant species and a few have a wide host range. This PowerPoint Presentation comes from the Virtual Cell Biology Classroom of Science Prof Online, and, as such, is licensed under Creative Commons Attribution-ShareAlike 3.0.; meaning you can download, share and alter any of this presentation, but you can’t sell it or repackage and sell any part of it. host. of itself and causes the cell to . DNA reverse transcribing viruses D. Replication is how a virus spreads. destruction. releasing more viruses.) Virulent viruses, either DNA and RNA, shut off cellular protein synthesis and disaggregate cellular polyribosomes, favouring a shift to viral synthesis. Viral Replication Scott M. Hammer, M.D. invade. –Replication strategies of viruses •Seven classes: 1. dsDNA viruses 2. ssDNA viruses 3. dsRNA viruses 4. cell and take over the cell . The replication cycle can be blocked at several stages using single or combined treatment paradigms: virus entry can be inhibited by antispike antibodies elicited by vaccines to block attachment or by preventing fusion using relevant protease inhibitors. INTRODUCTION Virus infection & replication – A synonym Virus is a nucleo-protein having RNA or DNA as a genetic material. … Classification of virus on the basis of genetic material present, presence of a number of strands, presence of envelope, capsid structure, shapes of the viruses, types of host, mode of transmission, replication properties, site of replication and Baltimore Classification. causing. 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