ENZYMES
Chemical reactions need help to get started. Ex: A fire needs a match to get it started.
______________ to get a chemical reaction _______________ = ________________________ Energy required STARTED ACTIVATION ENERGY ACTIVATION ENERGY REACTANTS PRODUCTS Image from: Pearson Education Inc, publishing as Pearson Prentice Hall. All rights reserved
___________ HELP CHEMICAL REACTIONS _______________ HAPPEN FASTER Image from: Pearson Education Inc, publishing as Pearson Prentice Hall. All rights reserved CATALYSTS ___________ HELP CHEMICAL REACTIONS _______________ HAPPEN FASTER Catalysts work by ____________ the ___________________________to get a chemical reaction started. DECREASING ACTIVATION ENERGY required
IT’S LIKE PUSHING A SNOWBALL UP A HILL Once it gets to top . . . it can roll back all by itself
CATALYSTS in Living Things In living systems __________ that ________________to control chemical reactions are called = _________ PROTEINS act as catalysts ENZYMES SEE ANIMATION of AMYLASE
Click the image to play the video segment. Enzymatic Reactions 2D Click the image to play the video segment. Video 4
PROTEINS CAN BE ENZYMES ACTIVE SITE ENZYME SUBSTRATE ENZYME-SUBSTRATE COMPLEX ENZYME Unchanged & Reusable PRODUCTS
Click HERE to learn more about enzymes ENZYMES _____ like a _______________ to only _________of _________. Enzymes are ___________ by the reaction and ___________ FIT LOCK AND KEY SUBSTRATE ONE KIND UNCHANGED REUSABLE
FACTORS THAT AFFECT ENZYME ACTIVITY __________ & ______________ Conditions that are TOO ACIDIC or TOO HOT cause proteins to ________ or _________ pH temperature UNWIND DENATURE See a movie Choose narrated
changes shape ACTIVE SITE Denaturing _______ the _______ of the ______________ so enzyme ______________ to ____________ changes shape ACTIVE SITE CAN’T BIND SUBSTRATE HOMEOSTASIS _______________ (keeping pH and temperature constant) is ______________ for maintaining ____________________ IMPORTANT ENZYME FUNCTION
-ASE Many enzyme NAMES end in _____ and the beginning of the name tells what it does DNA Polymerase= “polymerizes” joins monomers to make DNA Protease= breaks down proteins ATP synthase= synthesizes ATP
How is the SHAPE of an enzyme related to its FUNCTION? MAKE CONNECTIONS How is the SHAPE of an enzyme related to its FUNCTION?