MCB 100 1st Edition Lecture 16 Outline of Last Lecture I. MetabolismA. Anabolic and catabolic reactions II. Enzymes III. Bacterial enzymes IV. General steps of an enzyme catalyzed for biochemical reactions V. Enzyme classes VI. Metabolic pathways and metabolic intermediates VII. Simple proteins and conjugated proteins VIII. Conditions that can affect the activity of an enzyme Outline of Current Lecture I. Enzymes- what they can/cannot doII. ATP- the energy molecule of cells Current LectureI. Enzymes- what they can and cannot doA. Enzymes make biochemical reactions go faster by reducing the activation energy barrier by stabilizing the transition stateB. Enzymes don’t change the nature of the reactants or products C. Enzymes don’t change the chemical potential energy of substances D. Enzymes don’t change the Free Energy of a ReactionE. Enzymes don’t make unfavorable reactions favorable II. ATP- the energy molecule of cells A. ATP stands for adenosine triphosphate- it has 3 phosphate groups on adenosineB. Bonds b/w phosphates are unstable and have high chemical potential energyC. Adenosine diphosphate or ADP has 2 phosphate groups, so it has 1 less "high energy" bondD. Energy is released when ATP looses a phosphate to form ADP + free phosphateE. Energy from a catabolic reaction can be trapped by the cell and used to attach a phosphate to ADP to make ATP. This is how a cell stores energy for a short amount oftimeF. Cells use ATP as an energy source to drive unfavorable biosynthetic reactions (formation of phosphoester bond b/w glucose and a phosphate to make glucose-6-phosphate is an unfavorable reaction that requires 14 kcal per mole; hydrolysis of These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.ATP is a favorable reaction that releases about 20 kcal of energy/mole; adding hydrolysis of ATP and ADP makes the phosphorylation of glucose
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