you’re eating a carrot… 1. you begin to chew (manual breakdown) 2. you are salivating as you...
Post on 18-Jan-2016
217 Views
Preview:
TRANSCRIPT
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
top related