accelular microorganisms (viruses, viroid and prions)

1.general characteristic

~smaller than bacteria
~must have host to survive
~contain a single nucleic acid
~contain a protein coat

6. morphology

~helical viruses
~polyhedral viruses
~enveloped viruses
~complex viruses

5. classification

using International Commities for Taxonomy o virus(ICTV)
~ nucleic acid type
~ nucleic acid strandedness
~the sense (+ve/-ve) of ssRNA
~presence?absence of envelope
~type of host

2. host rrange

~infect inveterbrate, vetebrate, plant, protist, fungi, bacteria
~narrow host range
~specific host

3. size

~smaller than bacteria
~wide range

4. viral structures

Nucleic Acids
~DNA or RNA
~ss or ds DNA
~segmentation
~sense of the strand

Envelope (covered caspid)
~lipid
~protein
~carbohydrates

Caspid (protein coat)
~icosahedral
~pleomorphic
~cylindrical