Post on 05-Jan-2016
description
Enzymes
Chemical Reaction
Occurs when bonds are broken or formed to create a new substance
Reactants Products
PB + J + Bread PB&J Sandwich
Metabolism
Sum of all chemical reactions in living things
Cells regulate chemical reactions through the use
of proteins called ENZYMES
Characteristics of Enzymes #1
Enzymes are biological catalysts
What is a Catalyst?
Catalysts speed up chemical reactions without being involved
Ex: What do you do to help sugar dissolve faster in tea?
Example of Enzymes as CatalystsSPIT ~ SALIVA
Enzymes and Reactions
Characteristics of Enzymes #2
Enzymes are site specific, only react at certain location
One enzyme = One job
How Enzymes Work
What does this mean?????
Lactose Intolerance
Environmental Effects on Enzymes
1. Temperature • High
Temperatures can denature enzymes
• Denature means lose shape.
Environmental Effects on Enzymes
1. Temperature • Low
Temperatures cause enzymes to move slowly
• Decreasing
enzyme activity
Environmental Effects on Enzymes
1. pH • Dramatic
changes in the pH of a solution can denature an enzyme
• Decreasing
enzyme activity
DigestionNerves
Digestion Papaya’s