CELL ENERGY
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AQUIRE THE ENERGY MOLECULE
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AUTOTROPH – make it
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Chemosynthesis
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Nitrogen Fixation N2+ 12 ATP → 2 NH3
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Hydrogen Sulphate CO2+ATP + 4H2S + O2→ C6H12O2 + 4S + 3H2O
Photosynthesis CO2+sunlight + H2O → C6H12O2 + H2O
HETEROTROPH – consume it
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Consumer ingest then digest C6H12O2
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Decomposer digest then ingest C6H12O2
EXTRACT CHEMICAL ENERGY FROM THE MOLECULE ATP
ANAEROBIC -no O2
• Denitrification N03-
N02NO
N 2O
• Methanogens HC03- + 4H2 + H+
N2
CH4 + 3H2O
• Fermentation C6H12O6 → 2 CH3COCOO− + 2 ATP + 2 H2O + 2H+
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AEROBIC – with O2 - C6H12O2 + O2 CO2 + H2O + ATP
CELLS
SINGLE CELLED ORGANISMS
MULTICELLULAR ORGANISMS
VARIETY OF ENERGY ACQUISITION
AND EXTRACTION METHODS
CELL EVOLUTION TIMELINE
ENDOSYMBIONIC Theory = Theory of how the first Eukaryotic Cells
Formed
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In-folding of cell membrane formed the nucleus (also some evidence
suggesting it could have viral origins)
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Consumer prokaryote engulfed and formed symbiosis with Aerobic
bacteria Mitochondrion
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Later a Consumer with Mitochondrion engulfed and formed symbiosis with
a cyanobacteria Chloroplast