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Materials: 3 worksheets

Materials: 3 worksheets. Catalyst (5 min): How did temperature affect the rate of a reaction as seen in our Gizmo? What are 2 ways enzymes can be denatured?. Materials: 2 half sheets and paper from yesterday. Catalyst: Identify the enzyme, substrate, and products in the following sentence.

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Materials: 3 worksheets

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  1. Materials: 3 worksheets • Catalyst (5 min): • How did temperature affect the rate of a reaction as seen in our Gizmo? • What are 2 ways enzymes can be denatured?

  2. Materials: 2 half sheets and paper from yesterday • Catalyst: Identify the enzyme, substrate, and products in the following sentence. A triglyceride is broken down into glycerol and fatty acids by lipase.

  3. Elite Eight Trait Check-Up • Respect the Threshold • Everyone on time? • Silent for First Five? • Be Prepared (2 min) • Seated • Have materials • Working on catalyst

  4. Unit 1 Class Point Challenge • Period 1: .77 • Period 2: .88 • Period 4: .90 • Period 5: 1.28 Winners!!! • Period 6: .37 • Period 7: .76

  5. Class Motto If there is a problem,We look for a solution. If there is a better way,We find it. If we need help,We ask. If a teammate needs help,We give.

  6. Announcements • We will be talking about Science and Engineering Expo Projects on Thursday/Friday. Come with research question (I have some of yours) • Enzymes Quiz Tomorrow • Enzymes project due • Thursday: Periods 1, 2, 4, 6 • Friday: Periods 5, 7

  7. Standard • SB1b. Explain how enzymes function as catalysts.

  8. Recap • Catalysts speed up chemical reactions. • Enzymes are catalysts inliving things. • Catalysts and enzymes work by lowering the activation energy necessary for a reaction to occur.

  9. EA is lowered by the enzyme

  10. How are enzymes denatured? • Denatured = Destroyed • Enzymes are denatured by high temperatures and low pH (acids)

  11. Collision Theory Gizmo • How did temperature affect the speed of molecules in the Gizmo? • How would this change the reaction?

  12. So how would adding a catalyst affect the reaction? • Would it affect the speed of the molecules? • Would it affect the speed of the reaction?

  13. Objectives • I can explain what it means for an enzyme to be specific, unchanged, and reusable. • I can recall the two ways enzymes are denatured. • I can identify the parts of an enzyme/substrate complex. • I can summarize the importance of enzymes in living organisms.

  14. Notes 2.3: Enzymes and Catalysts • This is a continuation from last week! You may write on the same notes paper.

  15. Enzymes Substrate:the material that an enzyme binds to Enzyme-Substrate Complex: enzyme and substrate together Active site: location where the substrate binds on the enzyme

  16. Enzymes • Enzymes often end in “ase” • Lactase (breaks down lactose) • Helicase (unzips DNA) • Amylase (breaks down amylose) • Lipase (breaks down lipids)

  17. Enzymes (Think – Pair – Share) • What’s a substrate? • What do enzymes usually end in? • Is lactase an enzyme or a substrate? How do you know? • What do you predict is the substrate for the enzyme sucrase?

  18. Characteristics of Enzymes • Enzymes are: • Specific • Unchanged in a reaction • Reusable

  19. Characteristics of Enzymes Enzymes are specific: • They only work with one reaction • The enzyme and the substrate fit together like a lock and a key

  20. Video • Think: How does this game show related to the characteristics of enzymes?

  21. Characteristics of Enzymes

  22. Or you might see it like this… • You will have to be ready to read a variety of different diagrams

  23. Enzymes (Think – Pair – Share) • What is an enzyme? • What does it mean to say that enzymes are specific? • What does it mean to say that enzymes are reusable? • Why are enzymes important?

  24. Enzymes What is structure X? What is structure Y? What is structure Z?

  25. Cystic Fibrosis Gaucher's Disease Low Stomach Acid Inflammatory Bowel Disease/Syndrome Intestinal Inflammation Ulcerative Colitis Ulcers Acne Gingivitis Sprue Pancreatic Insufficiency Enzyme Disorders*LEL (Low Enzyme Levels) is America's & the world’s number one cause of sickness and death.*Inhibitors are molecules that decrease enzyme activity, and activators are molecules that increase activity. Drugs and poisons are often enzyme inhibitors.

  26. Classwork 2.3: Enzymes • You will have 15 minutes to work on this assignment. • Graded for accuracy!

  27. Enzymes Project Objective: Manipulate enzyme cut outs to represent a chemical reaction in our body. Directions: 2 people at each table start with part A and 2 people start cutting. Then switch!

  28. Panther Pass • What do enzymes do? • What does it mean to say that enzymes are “specific”? • What are the 2 ways enzymes are denatured? • Which of the following statements best describes enzymes? • Enzymes cannot be reused after a reaction • Enzymes are organic catalysts • Enzymes slow down chemical reactions • Enzymes can bind to any substrate

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