Bio 101 Week 6 Notes
Bio 101 Week 6 Notes Bio 101
Virginia Commonwealth University
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This 2 page Class Notes was uploaded by Vania Notetaker on Thursday September 29, 2016. The Class Notes belongs to Bio 101 at Virginia Commonwealth University taught by Rachell Hill in Fall 2016. Since its upload, it has received 12 views. For similar materials see Biological Concepts in Biology at Virginia Commonwealth University.
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Date Created: 09/29/16
Bio 101 Week 6 Notes Terms/Key points Enzymes – catalyst (promotes reaction) -Sometimes a reaction cant happen without it What enzymes reduce activation energy? - Stress chemical bonds - Directly participate in reaction - Create a microhabitat conductive to reaction - Hold substrate in place to allow interaction Active site is where the substrate binds Regulating enzyme activity Increase enzymes/substrate + Increase in reaction rate Only to the point where all active sites have been binded Temp. Increase in temp. = Increase reaction rate *But to much increase denatures the enzymes Presence of inhibitors or activators Activators change shape of active site to match needed shape Inhibitor changes shape of active site to no match the shape needed pH too high or too low pH changes shape to not match what is needed but a just right pH increases reaction rate Competitive inhibitor Bind to the active site so substrates can’t bind to it Noncompetitive (Allosteric) Binding to another part (not active site) and changing that shape of the active site Non-functioning enzymes -Sequence of amino acid is incorrect -Active site shape changed Phenylketonuria *Non-function enzymes cause of large number of diseases and physiological problems **Lactose intolerance Cellular respiration Oxygen we breathe is a by product of cellular respiration And CO2 is a byproduct Eat food -- > digest it -- > Absorb nutrients in bloodstream -- > break bonds to get energy CELLULAR CURRANCY Big picture; Input: oxygen and sugar Output: CO2, water and energy Aerobic Cellular respiration -Potential energy stored in bonds of sugar, protein and fat molecules -break bonds to release energy Aerobic resp. = needing oxygen to occur Three stages of Respiration 1. Glycolysis 2. Krebs cycle 3. Electron transport chain *Some organism rely solely on glycolysis to get energy (quick burst of energy) Glycolysis Happens in cytosol Makes 2 ATP Krebs Cycle Happens in mitochondria Makes 2 ATP Electron transport chain Happens in mitochondria Makes 32 ATP
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