Prokaryote or eukaryote?
Look at the following
pictures and try to
classify them. Can you
find a pattern?
1.
2.
3.
5.
6.
7.
Streptococcus pneumoniae
Escherichia coli cell
1.
5.
Amoeba cell
Binary fission prokaryotic cell
2.
6.
Onion cells
Embrionic stem cells
3.
7.
https://www.youtube.com/watch?v=Pxujitlv8wc&ab_chann
el=AmoebaSisters
What are BACTERIA?
SOME TAXONOMY
Unicellular organisms
CHARACTERISTIC
S
PROKARYOTIC CELLS: no nucleus or membrane bound organelles.
Single loop of DNA.
(Some bacteria have an extra circle of genetic material called a plasmid.
The plasmid often contains genes that give the bacterium some
advantage over other bacteria.
Bacteria are classified into five groups according to their basic shapes:
spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or
corkscrew (spirochaetes). They can exist as single cells, in pairs, chains
or clusters.
BACTERIA
CLASSIFICATIO
N (according to
shape)
Bacteria among
us!
This Photo by Unknown Author is licensed under CC BY
We use bacterias to
our benefit!
Despite the fact that some bacteria play
harmful roles, such as causing diseases
and spoiling food, the industrial and
economic importance of bacteria includes
both their useful and harmful aspects.
How do human benefit from bacteria?
Symbiotic bacteria.
Chemical
manufacturing, such as
the production of
ethanol, acetone,
organic acids, enzymes,
and perfumes.
Food products, such as
beverages, dairy
products, amino
acids, proteins, and
nutritional supplements.
Pharmaceuticals, such
as the manufacture of
antibiotics, vaccines,
and steroids.
Decomposing sewage
waste. Bioremediation
Energy, in the form of
biogas (methane).
Microbial mining
Agriculture, such as
composting processes
and use as pesticides.
Bioindicators
Reticulitermes
Symbiotic
bacteria
Vibrio ficsheri
Chemical Manufacturing
Produces: acetone, ethanol and buthanol
Clostridium acetobutylicum
Pharmaceutical
industry and
biotechnology
Insuline production. E. coli and Saccharoyces cerevisiae**
Bacteria in the Energetic industry
Platinum mining, bacterias that concentrate the metal.
Bacterias in the food industry
Decomposing wastes and bioremediation
Agriculture: composting processes, use as pesticides
and Bioindicators
Bioindicators