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Chemical Reactions and Enzymes
I. What are enzymes? Your body has lots of reactions!Enzymes: special protein catalysts that speed up specific reactions End in ASE Ex. Lactase digest lactose
The energy needed to get a reaction startedActivation Energy: The energy needed to get a reaction started
III. Lower the Activation EnergyActivation energy is the “start up” energy of a reaction They do not raise the temp! Increase the frequency that the reactants come together to react!
Enzymes Without Enzyme With Enzyme Free EnergyProgress of the reaction Reactants Products Free energy of activation
IV. Enzymes are SpecificThe shape of each enzyme fits the shape of what its acting on SUBSTRATE: the reactant that connects with enzyme ACTIVE SITE: area where the substrate and enzyme meet up
V. Lock and key model Lock is the enzyme Key is the substrateThe lock hole is the active site
Enzymes can only catalyze 1 reaction because they only allow substrates with one particular shape to bond oes not fit!
Factors that Affect the Enzyme PerformanceTemperature pH Salinity Concentration of enzyme or substrate
Temperature Enzymes are PROTEIN Heat too high they can denature
pH Enzymes work best at an ‘optimal’ pH Proteins they can denatureTrypsin
Salinity Too much salt will cause the enzyme(protein) to denature, changing its shape so it will not function
Other factors Concentration of enzyme and concentration ofsubstrate will affect how many reactions can occur. Reactions depend on the limiting factor!
Enzymes are Reusable Enzymes will speed the reaction for a substrateIt will release the product and will work on another substrate
Examples Life is not possible without enzymes! !!!!!!! Lipase ProteaseLactase Sucrase Amylase Life is not possible without enzymes! !!!!!!!
Energy In Reactions Energy is released or absorbed whenever chemical bonds are formed or broken. Because chemical reactions involve breaking and forming.
Identify and Investigate the role of enzymes.
Enzymes Objective 2.01 Functions of Enzymes How Enzymes Work.
1 Enzymes Enzyme and Digestion film clip Enzyme and Digestion film clip.
KEY CONCEPT Enzymes are catalysts for chemical reactions in living things Some chemical reactions that make life possible are too slow or have activation.
ENZYMES ARE PROTEINS THAT SPEED UP SPECIFIC REACTIONS IN CELLS
Boardworks High School Science Enzyme Shape
Explain how enzymes function as catalysts.
1 Enzymes This is a video, click below to see clip. If it doesn’t work, copy and paste link to see video. bug.
2.5 Enzymes KEY CONCEPT Enzymes are catalysts for chemical reactions in living things. h.com/media/action/yt/watc h?videoId=NdMVRL4oaUo.
6.2 Enzymes and Chemical Reactions pages
ENZYMES Enzymes are organic compounds. They are made up of proteins. They are called organic catalysts Catalysts speed up a reaction but are not used.
Chemical Reactions & Enzymes
Word Splash Enzyme Active Site Biological Catalyst Activation Energy Substrate Denatured Lock and Key Reusable.
Aim: What are enzymes? I. Enzymes (Organic Catalysts) – proteins that change the rate of a chemical reaction (usually speeds it up). A. Characteristics.
Enzymes. Pre – Key Point 1: Chemical Reactions Reactants Products REACTANTSPRODUCTS.
Do Now. Do Now Answers N C L L C N C A P P Enzymes Proteins that catalyzes a chemical reaction.
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