BIOL 2905 Study Guide - Mitochondrial Matrix, Dehydrogenation, Glyceraldehyde 3-Phosphate
Document Summary
In glycolysis, the six-carbon glucose molecule is broken in half into two three-carbon molecules. This process uses two atp units and creates four atp units, for a net production of two atp molecules. At the end of glycolysis, the molecules can become lactic acid, or lactate, and exit the cell, or become pyruvate and enter the next part of anaerobic glycolysis called the tricarboxylic acid cycle. Three stages: glycolysis, krebs cycle, and the electron transport chain. Glycolysis--enzymatically converts glucose through several steps into pyruvic acid. May be only the first phase of aerobic respiration or it may serve as the primary metabolic pathway (fermentation). Provides significant means to synthesize small mount of atp anaerobically and to generate pyruvic acid--an essential intermediary metabolite. Next step converts the one dihydroxyacetone phosphate (dhap) to glyceraldehyde-3-p (g-3-p) resulting in two g-3-ps. All subsequent steps happen twice (one to each of the 3-c molecules) (5) first, the g-3-ps each receive another phosphate.
