PPT-Enzymes: Biological Catalysts

2 The MichaelisMenten equation describes the initial reaction velocity as a function of substrate concentration When v o ½ V max K M S Thus K M is the substrate concentration that yields. of. . Reactions. – Part 2. Factors. . affecting. . the. rate . of. . reaction. The . surface. . area. The . concentration. . of. . the. . reactant. The . temperature. . at. . which. . the. Apoenzymes. , . Holoenzyme. , . Abzymes. , . Synzyme. , . Ribozyme. , . Extremozyme. , Historical Development in . Enzymology. , . Characteristics of enzymes, Enzyme Vs Chemical Catalysts. , Enzyme mechanism & Activation Energy, Enzyme Specificity, Fischer and . Things that Effect Rate. Catalysts- substances that speed up a reaction without being used up.(enzyme).. Speeds up reaction by giving the reaction a new path.. The new path has a lower activation energy.. ENZYMES (DR. NUGENT) I. INTRODUCTION TO ENZYMES/CATALYSTS a. Definition: enzyme = biological catalyst (catalyst = speeds rate of reaction) b. Features of enzymes: i. Enzymes speeds up the rate of a re . Lecture 10. : . Reaction . kinetics. Lecture 10 topics Brown chapter 14. 1. Reaction rates. Factors . that effect reaction rates . 14.1. Visualizing rates . & . units 14.2. Baseline (Flightpath D): To be able to define the terms ‘catalyst’ and ‘enzyme. ’.. Further (Flightpath C&B ): To be able to describe the properties of enzymes. To use the lock and key theory and collision theory to explain enzyme action. CATALYSTS AND ENZYMES. What are catalysts?. Simply put, catalysts are substances which, when added to a reaction, increase the rate of reaction by providing an alternate reaction pathway with a lower activation energy (Ea).. Are specific for . what they . catalyze . and do not permanently change during reactions. End in the word -. ase. Function of Enzymes. Enzymes work by lowering the activation energy (the amount of energy needed to start a reaction). . 2008, Prentice Hall. Chemistry: A Molecular Approach. , 1. st. Ed.. Nivaldo Tro. Roy Kennedy. Massachusetts Bay Community College. Wellesley Hills, MA. Tro, Chemistry: A Molecular Approach. 2. Catalysts. McMush. lab to front tray. Catalyst: Identify all examples of macromolecules in the passage below. Write down the example and what type of macromolecule it is.. A Big Butt Is A Healthy Butt: Women With Big Butts Are Smarter And Healthier. McMush. lab to front tray. Catalyst: Identify all examples of macromolecules in the passage below. Write down the example and what type of macromolecule it is.. A Big Butt Is A Healthy Butt: Women With Big Butts Are Smarter And Healthier. Part 1. . Chapter 3. Learning outcomes. You should be able to:. explain how enzymes work. describe and explain the factors that affect. enzyme activity. use V. max. and K. m. to compare the affinity of different enzymes for their substrates. On the surface of an enzyme, a small region called an active site binds a substrate and catalyzes a specific reaction for that substrate.. Learning . Goal . Describe enzymes and their role in enzyme-catalyzed reactions.. enzymes. . . The . substance converted by an enzyme is called a . substrate. , and a substance resulting from the conversion of the substrate is called the . product. . . The . enzyme is not consumed during the reaction catalyzed by it, so one enzyme molecule is involved in the conversion of many substrate molecules .