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Ap bio cell respiration2 ppt

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Cellular Respiration Stage 1: Glycolysis What?s the point? The point is to make ATP! ATP Glycolysis Breaking down glucose ?glyco ? lysis? (splitting sugar) ancient pathway which harvests energy where energy transfer first evolved transfer energy from organic molecules to ATP still is starting point for ALL cellular respiration but it?s inefficient generate only 2 ATP for every 1 glucose occurs in cytosol glucose ? ? ? ? ? pyruvate 2x 6C 3C In the cytosol? Why does that make evolutionary sense? That?s not enough ATP for me! Evolutionary perspective Prokaryotes first cells had no organelles Anaerobic atmosphere life on Earth first evolved without free oxygen (O2) in atmosphere energy had to be captured from organic molecules in absence of O2
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