October 19th, 2016 Obj: You will be able to discuss the role of enzymes in living things. Do Now: Get ready for cycle quiz Hw: Enzyme Coloring, Read pages 83-85

October 20th, 2016 Obj: You will be able to discuss the role of enzymes in living things. Do Now: have you every heard the word enzyme or catalyst before? What did it mean or how was it used? What was being talked about? Hw: Read pages 83-85, Lab tomorrow

Enzymes

Enzymes What are they? What properties do they have? Why do we need them? How do they work? What factors affect their activity?

Enzymes – What are they? Proteins that help chemical reactions to occur in living organisms Important Parts of a Chemical Reaction Reactants  Products

Enzymes Specific (a different enzyme for each different type of reactions in the body) Properties

Enzymes Specific Properties Increase rate of the reaction (help make reaction happen more often or faster)

Enzymes Specific Increase rate of the reaction Properties Unchanged at the end of the reaction Reusable

Enzymes Why do you need them? Specific Properties Increase rate of the reaction Unchanged at the end of the reaction Reusable Why do you need them?

Enzymes (page 83) Need them Life depends on countless chemical reactions that are essential for survival. Reactions naturally occur too slow to maintain life! Need them An energy barrier must be overcome to begin a chemical reaction.

How do enzymes work?

Lock & Key Theory The enzyme needs to bind to the reactants called a substrate at the active site to work. Reactant Enzyme

Let’s Do An Example

Sucrose + H2O Glucose + Fructose

Reactants Sucrose + H2O Glucose + Fructose Products

For a reaction to occur the sucrose and water would have to collide with enough energy to break bonds and form the new products. This energy is the called activation energy.

Energy Progress of reaction

Energy Substrates or Reactants Progress of reaction

Energy Products Substrates Progress of reaction

Energy Substrates Products Progress of reaction

Activation energy Energy Substrates Products Progress of reaction

Height aka reduce the activation energy An Enzyme is like a short cut! Activation energy Enzymes reduce the Height aka reduce the activation energy Energy Substrates Products Progress of reaction

October 21st, 2016 Obj: You will be able to identify how different conditions affect enzyme activity. Do Now: Finish worksheet from yesterday Hw: finish lab questions, enzyme packet