intro cracker intro: what happened to the cracker and why? did the cracker taste the same as time...
Post on 23-Dec-2015
231 Views
Preview:
TRANSCRIPT
Intro
Cracker intro:
•What happened to the cracker and why?
• Did the cracker taste the same as time went on?
Enzyme
starch
Enzyme
Sugar
Enzyme function
How do enzymes work? • Digestive enzymes break macromolecules into their building blocks
• An enzyme is specific for its substrate
• An enzyme is reusable
water sugar starch
iodine
water amylase
Starch-iodine solution
amylase
What would happen if you added more iodine?
iodine
amylase
What would happen if you added more starch?
starch
Enzyme
Enzymes are proteins = amino acids chains folded up in a specific way
• Proteins are sensitive to their environment• Heat or acidity can change the shape of proteins
How acids effect enzymes
Acid (vinegar)
amylase
Starch-iodine solution Starch-iodine solution
Acid (vinegar)
Amylase lesson
water
Starch-iodine solution Starch-iodine solution
amylase
Amylase lesson
Lab activity: Testing the amylase activity in your saliva
Amylase lesson
Why were some samples lighter blue than others?
1
2
3
4
5
6
7
8
9
10
11
12
Interpreting your results
What does the amount amylase in your saliva tell you?
• Can you change the amount of amylase in your saliva through your diet?
• Do students with a high amount of amylase in the class have an evolutionary advantage over other students with a lower amount?
top related