Enzyme Webquest
Target: Language of Anatomy
Please respond in complete sentences or copy the question and respond in note format on a
separate sheet of paper.
WEBSITE #1: http://www.northland.cc.mn.us/biology/Biology1111/animations/enzyme.html
Choose ENZYMES: The BASICS
1. SLIDE ONE: List the characteristics of an enzyme
2. SLIDE TWO-THREE: List and define parts of an enzyme. Sketch one below.
3. SLIDE THREE: DRAW an ENZYME and SUBSTRATE. Make each a DIFFERENT COLOR and label each.
Explain what a substrate is and describe its characteristics.
4. SLIDE FOUR: What is the INDUCED FIT?
5. SLIDE FIVE: You just drank a glass of milk! Draw the catalytic cycle of lactose! Labeling the SUBSTRATE,
SUBSTRATE ENZYME COMPLEX, the ACTIVE SITE, and the PRODUCTS. Making each a different color!
6. Someone who is “LACTOSE INTOLERANT”…is lacking which enzyme? ____________________
WEBSITE #2: http://www.phschool.com/science/biology_place/labbench/lab2/intro.html
Enzyme Catalysis
Introduction
7. How do enzymes catalyze reactions?
Key Concepts
8. What happens to the substrate and the enzyme after an enzyme mediated reaction?
9. Explain in your own words what it means if an “enzyme is specific for the reaction it will catalyze.”
10. In this laboratory,
Enzyme = catalase, found in your liver
Substrate = hydrogen peroxide (H2O2)
Products = water and oxygen
11.
Draw the reaction that took place on the left USING
YOUR OWN SHAPES, labeling the SUBSTRATE,
ENZYME, ACTIVE SITE on the enzyme, ENZYMESUBSTRATE COMPLEX, and the PRODUCTS.
Enzyme Structure
12. Explain the importance of the amino acid sequence in determining the type of substrate that is able to bind.
13. Observe the two models on the web page. Explain when each model may be better than the other.
Binding Specificity
14. Enzymes exist inside cells. Explain how an enzyme will only react with certain substrates even though there may be
thousands of other different substrates inside cells.
Induced Fit
15. Observe the INDUCED FIT ANIMATION and describe what happens below. Create an analogy to an induced fit.
(An induced fit is like… because… )
Some Factors That Affect Enzyme Action
16. Explain the meaning of denatured, and list two factors that may cause denaturation.
pH and Enzyme Function
17. Watch the animation. Describe what happens to the enzyme and its ability to catalyze the substrate when acid is
added.
Temperature and Enzyme Function
18. What happens to the rate of chemical reactions when the temperature is increased? What happens to the rate of
chemical reactions involving an enzyme when the temperature is increased? Explain.