Viruses Viroids and Prions Part 1

Viruses Viroids and Prions Part 1 - Viruses, Viroids &...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
    Viruses, Viroids & Prions
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Virology
Background image of page 2
    Viruses:   Simple biomolecular particles with no  metabolism, no growth, no cellular structure-  Yet… Cause most of the diseases of  the industrialized world.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
    General Characteristics of  Viruses- Obligatory intracellular parasites So are some bacteria and protozoa Contain a single type of nucleic acid Either DNA or RNA     Contain a protein coat surrounding the nucleic  acid =  CAPSID CAPSID Multiply inside living cells by using the  machinery of the host cell Cause the host to synthesize structures that  transfer the viral nucleic acid to other cells  VIRION VIRION  – a completely developed, extracellular,  infectious form of a virus
Background image of page 4
    Viral Genome and Structure Either DNA or RNA, but never both Single-stranded or double-stranded ssDNA, dsDNA, ssRNA, dsRNA Linear or circular Can be organized as one nucleic acid  segment –monopartite or  several segments –multipartite .   Genome sizes can range from ~2,500 to  250,000bp
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
    VIRUS  GENOMES DNA  RNA Single Stranded Double Stranded Circular + or - Segmented Double Stranded Segmented
Background image of page 6
    Viral vs. Cellular Genomes ssDNA, ssRNA, dsRNA are not used  as genetic material by cells. Genome structure is so diverse that it  is used to classify the viruses
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
    Viral Host Range Defined as the spectrum of host cells a  virus can infect Viruses may infect invertebrate,  vertebrate, plant, protist, fungal or  bacterial hosts. Any one type of virus usually infects a 
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 32

Viruses Viroids and Prions Part 1 - Viruses, Viroids &...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online