Assignment 2-4: Enzymes

Assignment 2-4 & 2-5: Chemical Reactions & Enzymes

EQ: What role do enzymes play in living things and what affects their function?

OBJECTIVES: 

-Explain the role of enzymes as catalysts that lower the activation energy of biochemical reactions. 

-Identify factors, such as pH and temperature, and their effect on enzyme activity.

KEY TERMS: Chemical reaction, reactant, product, bond energy, equilibrium, activation energy, exothermic, endothermic, catalyst, enzyme, substrate.

BELLWORK: Watch Amoeba Sisters Video HERE.

Soda cracker challenge! Your saliva contains an enzyme called amylase, which will help breakdown the starch in a soda cracker into sugar. After a while, the soda cracker should start to taste sweet. 

READING Pages 52-58

1. Define the key terms listed above.

2. Draw an energy graph for an energy-Absorbing reaction. Label the X-AXIS, Y-AXES, REACTANTS, PRODUCTS, and ACTIVATION ENERGY. See figure 4-3 on page 54 for help.

3. Draw an energy graph for an energy-Releasing reaction. Label the X-AXIS, Y-AXES, REACTANTS, PRODUCTS, and ACTIVATION ENERGY. See figure 4-3 on page 54 for help.

4. Draw an energy graph for a reaction that contains Enzymes. Label the X-AXIS, Y-AXES, REACTANTS, PRODUCTS, ACTIVATION ENERGY WITHOUT ENZYME, ACTIVATION ENERGY WITH ENZYME, REACTION PATHWAY WITHOUT ENZYME, and REACTION PATHWAY WITH ENZYME. See figure 5-1 on page 56 for help.

5. Explain the function of enzymes in living organisms.

6. List 3 things that can affect the activity of enzymes. 

Go HERE to conduct an experiment on the effect of temperature on enzyme activity.  Please complete the worksheet by writing all answers on a separate sheet of paper that will be turned in. You will work with a lab partner on this.