Virus Flashcards
Structure of a virus
Genetic material (DNA or RNA) enclosed in a protein capsid
Living qualities of a virus
Contains genetic material (DNA or RNA)
Has a protein coat
Can replicate in host cell
Non living qualities of a virus
Doesn’t have DNA and RNA
Noncellular - no cytoplasmic organelles
Can’t reproduce by themselves
Virus shapes
Round
Rod
Complex
Viral nutrition
Obligate parasites
Viral replication - list stages
Attachment
Entry
Synthesis
Assembly
Release
Viral replication - attachment
Virus proteins match host cell receptors allowing it to enter
Viral replication - Entry
Viral nucleic acid enters the cell, capsid stays outside.
Viral replication - Synthesis
Viral nucleic acid inactivates host DNA. Virus used host organelles to replicate
Viral replication - Assembly
New viruses are made
Viral replication - Release
Lysis (bursting of the cell) occurs and thousands of viruses are released
Advantages of viruses
Genetic engineering
Bacteriophages could be used to kill bacteria solving antibiotic resistance issue
Disadvantages of viruses
Human diseases
Tobacco mosaic virus
Treating viral infection
Immune system - interferons and complement systems limit spreas
Vaccination + antiviral treat
Antibiotics DO NOT affect viruses
