You’re eating a carrot… 1. you begin to chew (manual breakdown)

2. you are salivating as you chewAmylase in salviaAmylase is a digestive enzyme classified as a saccharidase

(an enzyme that breaks down polysaccharides).

3. Amylase is an ENZYME

What is an enzyme? GOOD QUESTION!

Enzymes

Function of Enzymes

Enzymes speed up the rate of reactionsEnzymes can be called catalysts

Catalysts speed up reactions

They do NOT Change the reaction

Enzymes

Most enzymes are proteins. Not all proteins are enzymes.

Enzymes and Substrates

Enzymes affect substratesSubstrate- substance on which an

enzyme acts

specific enzymes can only fit with specific substrates- called SPECIFICITYlock and key model

All pictures demonstrate the same thing. A perfect fit between enzyme shape and substrate shape.

Active Site Active sites are where the enzyme and

substrate will meet when they create the enzyme-substrate complex.

Enzymes

Shape determines function enzymes are very specific in their

function Under normal conditions, enzymes

do not change shape even after they perform their function. This means that enzymes can

be used over and over again.

Enzymes speed up reactions that would happen normally…

Enzymes Enzymes are catalysts.

enzymes speed up the rate of reactions in living things

Chemical Reaction:Reactants and productsEx.

Ex.

Reactants

Reactants

Products

Products

Reaction with an enzyme

Enzymes bind temporarily to the reactants of the reaction.

In doing so, they lower the amount of activation energy needed to start the reaction.

Therefore, reaction time is increased.

Enzymes Activation energy refers to the

amount of energy a system needs to initiate a process.

Enzymes

Enzymes Two factors can affect the shape of

an enzyme: temperature pH

Denature

Enzymes: OPTIMAL RANGE Enzymes works best when in their

proper environment activity decreases at values above

and below its optimal range. Ex.

Exit Card

1. Look at the picture. Name parts: A, B, C, D and E