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Bacteria vs Virus
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Differences (8)
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Bacteria
Virus
Enzymes:
Yes
Yes, in some
Size:
Larger (1000nm)
Smaller (20 - 400nm)
Viruses are not beneficial.
Some beneficial bacteria (e.g.
Beneficial?:
certain bacteria required in
the gut)
However, a particular virus
may be able to destroy brain
tumors (see references).
Viruses can be useful in
genetic engineering.
Living attributes:
Living organism
DNA and RNA. Exists as
Nucleic acid:
Ribosomes:
Outermost structure:
Considered living and nonliving
DNA or RNA. can be double-
double-stranded and circular stranded or single-stranded,
in shape.
circular or linear.
Present
Absent
Peptidoglycan cell wall or
capsule/slime layer in some.
Protein coat or viral envelope
Can cause disease?:
Yes
Yes
Infection:
Localized
Systemic
Bacteria (singular: bacterium) are HUGE unicellular microorganisms. They are typically a few
micrometers long and have many shapes including curved rods, spheres, rods, and spirals.
Viruses (from the Latin noun virus, meaning toxin or poison) is a sub-microscopic particle
(ranging in size from 20–300 nm) that can infect the cells of a biological organism.
Read more: Bacteria vs Virus - Difference and Comparison | Diffen
http://www.diffen.com/difference/Bacteria_vs_Virus#ixzz16nC3pkpr
Bacteria Cells vs. Animal Cells
The main difference between an animal cell and a bacterial cell is that a bacterial cell
contains a plasmid, a ring of DNA, opposed to the chromosomes that animal cells
possess. There are other differences, such as size (bacterial cells are many times smaller)
and whether or not they contain membrane bound organelles, which bacteria do not.
Bacteria cells have also flagella/flagellum that an animal cells (except spermatozoa or
sperm cells) does not, a "tail" strand that extends out of the cell to propel it forward.
Read more:
http://wiki.answers.com/Q/What_is_the_main_difference_between_animal_and_bacterial
_cells#ixzz16nCZESQC