SECTION 1: ACTIVATION ENERGY The picture to the right shows someone trying to push a boulder up a hill. In order for the boulder to reach its final destination at point B, it must be pushed to the top of the hill because once it reaches the top of the hill it will roll down the rest of the way. A similar scenario exists in chemistry, before a chemical reaction will take place, energy must be put into the system. The energy needed for a chemical reaction to move from point A to the top of the hill is known as activation energy, also written as Ea. Increasing Energy Activation Energy Activation Energy Energy Content of Reactants. Progress A + B Reactants. FIGURE 3 SV سعد Reaction Uncatalyzed Reaction (without enzyme) W FIGURE 2 Energy Content of Products Catalyzed Reaction (with enzyme) A C + D Products S X₁A ↓ (TIME) 3. Compare Figure 3 above to the Figure 1 (comparing the heights of 2 mountains), determine how using an enzyme in a chemical reaction impacts the reaction by answering these questions. As seen in the graph a. Does it speed up or slow down the reaction? b. What does the enzyme do to activation energy? c. Based on your answers to questions a and b, what do you think the term "catalyzed" means?

SECTION 1: ACTIVATION ENERGY The picture to the right shows someone trying to push a boulder up a hill. In order for the boulder to reach its final destination at point B, it must be pushed to the top of the hill because once it reaches the top of the hill it will roll down the rest of the way. A similar scenario exists in chemistry, before a chemical reaction will take place, energy must be put into the system. The energy needed for a chemical reaction to move from point A to the top of the hill is known as activation energy, also written as Ea. Increasing Energy Activation Energy Activation Energy Energy Content of Reactants. Progress A + B Reactants. FIGURE 3 SV سعد Reaction Uncatalyzed Reaction (without enzyme) W FIGURE 2 Energy Content of Products Catalyzed Reaction (with enzyme) A C + D Products S X₁A ↓ (TIME) 3. Compare Figure 3 above to the Figure 1 (comparing the heights of 2 mountains), determine how using an enzyme in a chemical reaction impacts the reaction by answering these questions. As seen in the graph a. Does it speed up or slow down the reaction? b. What does the enzyme do to activation energy? c. Based on your answers to questions a and b, what do you think the term "catalyzed" means?

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter4: Energy And Metabolism

Section: Chapter Questions

Problem 3SQ

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