PPT-16.5 Enzymes Enzymes are proteins that act as biological catalysts.

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 enzymecatalyzed reactions. 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 . 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 2. The Michaelis-Menten 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. 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. 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). . 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. Enzyme & Substrate. An enzyme is a globular protein which acts as a biological catalyst by speeding up the rate of chemical reactions. . Enzymes are . NOT. changed or consumed by the reactions they catalyze and thus can be reused. . Enzymes. Back when we discussed proteins, we learned that one critical function of protein was to speed up chemical reactions.. Enzymes. are the proteins that increase the rate of chemical reactions. by. Ms. . P. . . H. . Giri. Department of Microbiology. Deogiri . College, Aurangabad. B.Sc. F. Y.. Semester II. Paper No. V. Basic Biochemistry. Unit 3 Proteins. Ms. . Priyanka. H. . Giri. CLASSIFICATION OF PROTEINS :. Lecture by. :. . Dr. . Samia. . Naz. . (APWMO). Biochemistry Department, KEMU. Introduction. Proteins are the primary constituents of body. .  . These are genetically designed sequences of amino acids linked together by peptide bonds. . Today’s Objectives. Describe a general enzyme-catalyzed reaction. Discuss the relation of temperature and pH to rate of reaction in an enzyme-catalyzed reaction. Explain how chemical reactions are affected by enzymes.