1. ~ Take out paper for notes on digestive enzymes
BIOLOGY PAP
November 9, 2017
~ Take out paper for notes on digestive enzymes
~ Introduction to our “Calorimetry” Lab
~ Pre-Lab questions must be done in order to participate in the lab tomorrow. I must sign them before the lab for you to participate.

2. 38-3

3. Enzmyes
2015

4. SUBSTRATES (REACTANTS ) PRODUCT
Chemical Reaction Vocabulary:
Chemical Reaction:
Process that changes one substance into another
Build something from smaller pieces – Synthesis
Break something down – Decomposition
SUBSTRATES (REACTANTS ) PRODUCT
Enzyme:
Protein that speeds up chemical reactions (catalysts)
ENZYME

5. Chemical Reaction Vocabulary continued:
Reactants:
Starting materials in a chemical reaction (substrates)
Products:
Substances that are produced in the chemical reaction

6. Enzyme helps substrate turn into products
Example: Lipid Digestion
Enzyme lipase helps break down lipids into their building blocks (fatty acids and glycerol)
Enzyme –
Substrate (Reactant) –
Products –
Lipase
Lipids
Fatty acids and glycerol
Lipids Fatty acids + glycerol
Lipase
Substrate (Reactant)
Products
Enzyme helps substrate turn into products

7. Example: Lipid Digestion
Which enzyme is best structured to help break down lipids? Why? 1 2 3

8. Example: Lipid Digestion
The SHAPE of an enzyme must match the SHAPE of its specific substrates! 2

9. Enzyme Lab: Starch Digestion
Benedict’s Test: glucose is present = black 1 2
Starch + Water
Starch + Water + Enzyme
(salivary amylase)
STARCH GLUCOSE
salivary amylase

10. Enzyme
Substrate
Products

11. Changing pH or temperature…

12. Denaturing Enzymes Becomes deformed
Unable to speed up the reaction = its shape no longer matches its substrate