Intro Cracker intro: What happened to the cracker and why? Did the cracker taste the same as time went on?

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Presentation 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

wate r sugarstarch 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 Acid (vinegar)

Amylase lesson water 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?

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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?