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Biological Sciences
Mark Fitzpatrick

Metabolism Main Ideas Labs Plant Pigments & Photosynthesis & Cell Respiration Energy flows into an ecosystem as sunlight and ultimately as heat, while the chemical elements essential to life are recycled. Cellular Respiration - About 40% of the energy in a glucose molecule is transferred to ATP during cellular respiration making about 36-38 ATP. Glycolysis - occurs in the cytoplasm - During glycolysis each glucose molecule is broken down into 2 molecules of the compound pyruvate. In eukaryotic cells, pyruvate enters the mitochondrion - From there it is oxidized to CO2. ATP is than generated. - has 10 steps that are broken down into 2 main phases 1-3 energy is in the form of ATP. So ATP is hydrolyzed to ADP in two steps 7-10 glycolysis substrate level phosphorylations occur. The formation of ATP through the transfer of a phosphate group to ADP Krebs cycle / Citric Cycle - occurs in the matrix of the mitochondria - active transport - only occurs when oxygen is present, and processes lipids, proteins and carbohydrates Oxidative Phosphorylation - amounts for the most energy extracted from food - has two stages - Electron transport chain - Pumps in the christae - Moves the NADH and FADH2 => redox power
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