BCHM 3P01 Lecture : Introduction to Metabolism.docx

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How a cell utilizes energy to break down and build compounds within the cell o. How does that happen and how is that regulated. The stock market is a measure of different amounts of money- symbolic to the cell pooling its resources. If the cell has extra substrate then it shuffles the resource to another pathway. The cell tries to balance biosynthesis and degradation. Nadph and nadp+ are reduced cofactors that carriers high energy electrons. Useful to the cell but not as important as atp. 70% of atp energy will go to building of molecules. Allows a cell to extract energy from multiple sources in environment = synthesis macromolecules. Protons, ion gradients, concentration gradients (batteries, neurons, mitochondria) o. A reaction can occur spontaneously only if the free energy change, g is negative. When g is zero, the reaction is at equilibrium and no net change occurs. A reaction can not occur spontaneously if g is positive o o.

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