reet
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 mitochondria and chlorplast .present in bacteria
chromosomes number 1-4 (variable ploidy,cuz they tend to multiply)
any other input guys........
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| star1
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Its written in Kaplan Notes that Bacteria dont have mitochondria. where you read ?
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| mjl1717
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As I remember bacteria and mammalian cells are eukaryotes meaning they have cell membrane, nucleus, and mitochondria?
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| drk1980
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Kaplan says:
Virus: acellular
Fungi and Parasites(and mammalian cells): eukaryotic
Bacteria: Prokayotic
Prokaryotes (bacteria) lack membrane-bound organelles such as mitochondria. Functions of the mitochondria are carried out by enzymes present in the "plasma membrane" of both gram neg and pos bacteria.
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| mjl1717
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Thx drk-for some reason I always confuse that prokaryote and eukaryote.
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| star1
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drk1980 you are right . then from where bacteria got their ATP through glycolysis?
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| reet
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okay,,guys no mitochondria...So wht about chromosomal number?????
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| drk1980
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http://www.bookrags.com/sciences/genetics/chromos...
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| msyamp
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hi star.here is the answer for your question. bacteria and plants get their ATP only from substrate level phosphorylation
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| sturge_weber
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just like RBCs which also dont have mitochondria
and the enzymes which do substrate level phosphorylation re phosphoglycerate kinase and pyruvate kinase
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| mildus
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Bacteria are procaryotic organisms.
Bacteria don't have mytochondria (bacteria as other procaryotic organisms don't have any membranous organells, and the plasma membrane is functional analog to eucarotic membranous organeles).
Of course, first of all, we mustn't forget that there are several types of bacteria when talking about metabolism. There are aerobic and anaerobic bacteria, and several types between.
There are also several types of metabolism:
1. Respiration - i.e. glucose is converted to CO2 and H2O
a) aerobic respiration (molecular oxygen is present, they get 38 molecules of ATP) only in aerobic bacteria
b) anaerobic respiration (oxygen is from NO3-,SO4--, they get between 2 and 38 molecules of ATP) only in anaerobic bacteria
2. Fermentation - i.e. glucose in uncompletely catabolised, to pyruvate or something else (no oxygen, they get 2 molecules of ATP) only in anaerobic bacteria
Bacteria get their ATP both by substrate level phosphorylation (aerobic and anaerobic bacteria) and oxidative phosphorylation (aerobic bacteria).
Enzymes of glycolysis are present in all bacteria and are located in cytoplasm.
Enzymes of TCA cycle are present in aerobic bacteria and are located in the plasma membrane (because they don't have mytochondria).
Sorry for such a long post, but I have thought it would be better to be more systematic and precise.
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| mildus
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Bacterial genom
Bacterial genetic material consists of:
1. one chromosome (obligatory present)
2. extrachromosomal genetic material - plasmids (facultatory present and variable number)
1. They have ONE chromosome (which means they are HAPLOID). That chromosome consists of ONE CIRCULARY DOUBLE-STRANDED DNA MOLECULE.
2. Plasmid is also one DNA molecule (circulary, double-strand) but much smaller than chromosome. Plasmids can be present in one or more copies, but they are also bacteria without any plasmods)
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