Tuesday, January 22, 2008

three domains - detailed description

Bacteria (eubacteria)

Archaea

Eukarya

Most bacteria (formerly monerans)

Methanogens

Protista


Thermophiles

Fungi


Halophiles

Animalia



Plantae







FEATURE

Eubacteria Bacteria

Archaea

Eukarya

Nuclear envelope

Absent

Absent

Present

Membrane bound organelles

Absent

Absent

Present

Peptidoglycan in cell wall

Present

Absent

Absent

Membrane Lipids

Unbranched Carbons

Some branched

Unbranched

RNA Polymerase (enzyme that reads DNA)

One Kind

Several

Several

Initiator amino acid for protein synthesis

Formyl methionine

Methionine

Methionine

Introns (non-coding genes)

Rare

Present

Present

Response to streptomycin, Chloramphenicol

Growth inhibited

Growth not inhibited

Growth not inhibited

Histones with DNA

Absent

Present

Present

Circular chromosome

Present

Present

Absent

Ability to grow at temps >100° C

NO

Some species

No

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