Saturday, July 24, 2010

What's the difference bewtween virus, bacteria and fungi?

=D

What's the difference bewtween virus, bacteria and fungi?
Virus is very tiny - tinyer than bacteria and fungi. eg:Influenza


Bacteria. Nucleus is not fully developed. eg:E.Coli


Fungi. it includes mushrooms and yeasts. eg:Amanit muscaria
Reply:A virus isn't a cell, a bacterium is a eukaryotic cell, andf a fungus is a prokaryotic cell.
Reply:viruses aren't technically living, are the smallest, need living cells to reproduce in, are only made up of a protein coat and nuclear material.





Bacteria are med in size, are living, have 3 main shapes, rod (bacillus), spheres (cocci) and spirals. "Eat"by extracellular digestion. dont have a nucleus


Fungi are the biggest and are usually multicellular, feed like bacteria, have sexual reproduction more and produce "fruiting bodies" and spores, have chitin in their cells, have nucleus
Reply:the virus is a dead little shiit, the bacteria is a one celled little shiit, and fungi, is a little decomposer shiit,





A+ Bio H student
Reply:VIRUSES are particles composed of an internal core containing either DNA or RNA ((but not both)) covered by a protective coat. Approx dia 0.02 to 0.2 micro meter.Some viruses have an outer lipoprotein membrane called an envelope, external to coat. They do not have a nucleus, cytoplasm, mitochondria, or ribosomes. They must replicate within cells, because they cannot generate energy or synthesize proteins. Viruses replicate differently - in short the events occuring are:-


1. early events - attachment, penetration, %26amp; uncoating


2. middle events - gene expression %26amp; genome replication


3. late events - assembly %26amp; release


They can replicate to produce hundreds of progeny viruses. Are non-motile








FUNGI are eukaryotic organisms. Approx dia - 3 to 10 micro meter. The fungal cell membrane contains ergosterol %26amp; cell wall contains chitin. The nucleic acid have both DNA %26amp; RNA. There are 2 types - Yeast ((grow as single cells))%26amp; Molds ((grow as long filaments)). All fungi require a preformed organic source of carbon - association with organic matter. Thus natural habitate is "environment" - {{except Candida albicans - part of normal human flora}}


Reproduction - yeast by budding %26amp; molds by mitosis - spore formation, fragmentation of the ends of hyphae. Fungi are non-motile.


Important property - thermally dimorphic - forms diferent structures at differents temperatures.








BACTERIA are prokaryotic organisms - Absence of organelles like mitochondria %26amp; lysosomes. Approx dia - 1 to 5 micro meter. The cells have nucleoid ((single circular molecule of loosely organized DNA lacking a nuclear membrane %26amp; mitotic apparatus)) surrounded by cytoplasm, within which proteins are synthesized ((due to RNA)) %26amp; energy is generated. They have a rigid cell wall containing Peptidoglycan.


Replicate by binary fission. some bacterias are motile.


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