Chapter 2 Section 4 Review
8 Questions
| Total Attempts: 357
The following questions refer to section 4 of chapter 2 (chemical reactions and enzymes). The majority of the exam will be from this section of the chapter.
Questions and Answers
- 1.Why is it important that energy releasing reactions take place in living organisms?
- 2.The bar graph on page 58 of the text book shows the total amount of product from a chemical reaction performed at three different temperatures. The same enzyme was involved in each case. Describe the results of the reaction. How can you explain these results?
- 3.Why is comparing the way a key and a lock work together a good analogy for explaining how an enzyme works? In what ways is the analogy not perfect?
- 4.In humans, carbon dioxide and water quickly combine to form carbonic acid in the presence of a particular enzyme. Most likely, this same enzyme
- A.
Helps in the breakdown of acidic foods in the stomach
- B.
Is not involved in other types of reactions because enzymes are specific
- C.
Is involved in other reactions where temperature and pH are the same
- D.
Helps in the synthesis of sugars during photosynthesis
- 5.Based on the line graph on page 58 of the text, what can you conclude about the relationship between enzyme concentration and reaction rate?
- A.
Reaction rate decreases with increasing enzyme concentration
- B.
Reaction rate increases with decreasing enzyme concentration
- C.
Reaction rate increases with increasing enzyme concentration
- D.
The variables are not related
- 6.Which of the following lowers a chemical reaction's activation energy?
- A.
Cohesion
- B.
Adhesion
- C.
Catalysts
- D.
Reactants
- E.
Products
- 7.The elements or compounds that enter into a chemical reaction are the
- A.
Catalysts
- B.
Reactants
- C.
Products
- 8.Which class period are you in?
- A.
1
- B.
4
- C.
7
- D.
8
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