Viruses And Lichens (Biological classification) Flashcards
There is no mention of which acellular organisms in the five kingdom classification of Whittaker
Viruses
Viroids.
Prions. 
Viruses are ……… Organisms that are characterised by having and ……… Outside the living cell 
Non-cellular
Inert crystalline structure 
The word virus means
Venom or poisonous fluid 
Who recognised certain microbes as casual organisms of the mossiac disease of tobacco 
Dmitry Ivanovsky
Who demonstrated that the extract of infected plants of tobacco could cause infection and healthy plants and named the new pathogen virus and called the fluid as contagium vivum fluidum
MW Beijerinek
Who showed that viruses could be crystallised and crystals consisted largely of ….….
W.M.Stanley.
Proteins
Can viruses have both RNA and DNA as their genetic material? 
No viruses can have either RNA or DNA as their genetic material 
A virus is a ____ and the ____is infectious
Nucleoprotein
Genetic material 
In general viruses that infect plants have_______ ( genetic material)
Single-stranded RNA 
In general animal viruses have either___or____or____ (genetic material)
Single
Double-stranded RNA.
Double-stranded DNA. 
In general, bacterial virus is also known as____have ____(genetic material )
Bacteriophage
Double-stranded DNA
In viruses, the protein coat called___is made up of small subunits called____which protects the nucleic acid
Capsid
Capsomeres
Viruses cause diseases like
Mumps , smallpox, herpes, influenza, and AIDS 
In plants, the symptoms of virus infection can be
Mossiac formation leaf, rolling and curling, yellowing, and vein clearing, Dwarfing and stunted growth 
Viroids were discovered by
T.O. Diener 
