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Cyanobacteria

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

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Cyanobacteria

Postby CuriosityKilledtheCat » Sun Mar 20, 2005 1:05 am

Hullo...I am a newbie here :o

And I am a freshman in high school currently in Honors Biology...and we have really hardcore tests! :?

Anyways...I was wondering about this:

how can cyanobacteria have chlorophyll but not chloroplasts? What I mean is- how can it function and conduct photosyntesis without the 'factory' (chlorplast) to make its energy?
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Postby Poison » Sun Mar 20, 2005 3:30 pm

Cyanobacteria have chlorophyll in its cytoplasm. And, yes they do not have chloroplasts. Think about procaryotes. They do respire, right? Photosynthesis is similar to this. It occurs in the cytoplasm.
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Postby Nick » Mon Mar 21, 2005 5:03 am

Yeh i mite be wrong but dont they use water unstead of light to photosynhesis or something to do with H2O being broken down to o2 i dunno, just something i read somewhere
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Cytoplasm

Postby 2810712 » Mon Mar 21, 2005 9:18 am

Chloroplasts were bacteria in past , so I think, its less likely to find them in another bacteria. More over chloroplasts were photosynthetic bacteria and they contained minifactories called thylacoids in them which carried out light reaction and the cytoplasm carried out the dark reaction. The photosynthetic bacteria you are reffering to , too have thylacoids ,as per my knowledge . So, thylacoids carry out light reaction
while cytoplasm is the site for dark reaction. Some different type of vesicles similar to thylacoids maybe there in some kind of bacts.
Thanks.

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Postby CuriosityKilledtheCat » Thu Mar 24, 2005 11:50 pm

Thank-you very much to all of you! The confusion has been cleared up... :)
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Postby MrMistery » Sat Mar 26, 2005 7:14 pm

The main difference between Monera and everything else is they do not have organelles. SO, CIANOBACTERIA DO NOT HAVE CHLOROPLASTS!!! They do have clorophil, but it is not stored in the citoplasm, but in particles called mesosomes. They are simply vesicles formed by the cellular membrane.
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