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Cyanobacterial Vegetative Cell: cell wall cell membrane lipid droplet nucleoid polyhedral body RuBisCO cyanophycin thylakoids cyanophycean starch gas vacuole polyphosphate granule mesosome 70S ribosome light (ETS) reactions Calvin cycle sugar synthesis glycolysis Kreb’s cycle CO CH 2 O ETS reactions cytosol light chlorophyll H2OH2O O2O2 Photosynthesis Respiration CH 2 O + H 2 O + energy O 2 + CO 2

Cyanobacterial Vegetative Cell: ?

Sulfolobus acidocaldarius Extremophile Sulfur metabolism pH 1 to 6 75°C Optimum Strict aerobe Partial monolayer (C40) membranes Multiple DNA Circles Introns in DNA DNA binding proteins rRNA similarity RNA synthase similarity Operon style regulation 70S ribosomes TEM or SEM? Of Archaeon Shape?

Comparing Cell Sizes Mycoplasma µm E. coli 1x2 µm Cyanobacteria 10 µm diam Plant Cell 30x75 µm Obviously eukaryotic Nucleus present Mitochondrion  Bacterium Chloroplast  Cyanobacterium Endosymbiosis: Eukaryotes are Chimeras!