BIOB34H3 Lecture Notes - Osmosis, Electrochemical Gradient, Cell Nucleus
Document Summary
Biob34 lecture 2 - prof. dasilva september 13, 2012. Energy is made in the mitochondria (energy production) Metabolic pathways : govern a series of reactions that substrates are converted to products (catalyzed by enzymes) Enzymes: act as catalysts and make things happen faster. Linked by stable intermediate where there"s a substrate bound to an enzyme , then an intermediate and a product. Metabolism: the sum of metabolic pathways for the synthesis & breakdown of molecules. Energy metabolism: revolves around the production of atp & other energy-rich molecules. Most enzymes are made of proteins, but many enzymes also have non-protein components called cofactors. Enzyme activity is influenced by environmental conditions such as temperature, ph, salt concentration & hydrostatic pressure. Enzymes accelerate reactions by reducing the activation energy ( ) Once is met, the substrate adopts a transition state and then spontaneously changes the product. Enzymes accelerate rection rates and make possible reactions that would not normally occur at useful rates.
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