L2 - Prokaryotic Domains

L2 - Prokaryotic Domains - Have great affect on human health

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Most ancient organisms; found everywhere on this planet Humans have only discovered 5000 species; Possibly millions exist Microbiology: Study of Microbes ; microscopic organisms Prokaryotes (can deal with MANY extreme conditions) 1. Nucleoid contains DNA 2. Lacks nuclear membrane 3. Cytoplasm contains ribosomes & cytosol 4. Haploid Cells 5. Cell Wall 6. Reproduction by Asexual Reproduction ; Binary Fisson 7. Single Cell Organisms; BUT can form Colonies NOTE: Mutation & Conjugation allows new genetic make up, Conjugation – Genetics are transferred from one cell to another Differences in Bacteria & Archaea Bacteria: Cell walls are made of PEPTIGOGYLAN RNA Polymerse is simple; different from Prokaryotes & Eukaryotes Archaea: Cell walls are made of Polysaccaride RNA Polymerse is complex; similar to Eukaryotes Translation similar to Eukaryotes
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Bacteria & Archaea 1 st inhibitants & abundant Plays important role in ecosystems
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Have great affect on human health (medicine/infection) o Billions in our body; 500 Species in our mouth alone Bacteria cleans up pollution that CANT be broken down in Water (universal solvent); helps prevents toxins Bioremediation: Use of Prokaryotes & Bacteria to degenerate pollution Ex) Fertilization of toxic sites; live & feeds off toxins. Enzymes are more involved Cyanobacteria: Bacteria producing oxygen through cynthesis o Changed Earths atmosphere o Dominant in marine & fresh water environments Nitrogen Needed for protein synthesis & nucleic acid, organism cannot use it directly; bacteria converts it to NH 3 (ammonia); without Nitrgoen, a fraction of life would exist Nitrate Pollution can cause decrease in Oxygen causing Anaerobic, Dead Zones caused by Nitrates (NO 2 ) or (NO 3 ) Soluble in H 2 O; causes run-off Pathogenic: Disease causing Bacteria o NOTE: No Archaea are Pathogenic...
View Full Document

This note was uploaded on 04/12/2011 for the course BIO 153 taught by Professor Dr.arts during the Winter '11 term at University of Toronto- Toronto.

Page1 / 3

L2 - Prokaryotic Domains - Have great affect on human health

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online