1. © 2010 Pearson Education, Inc. Clicker Questions for use with Classroom Response Systems Campbell Essential Biology, Fourth Edition – Simon, Reece, and Dickey Campbell Essential Biology with Physiology, Third Edition – Simon, Reece, and Dickey Questions prepared by Brad Williamson, updated by Mike Tveten Chapter 6 Cellular Respiration: Obtaining Energy from Food

2. © 2010 Pearson Education, Inc. Concept Check Some prokaryotic and all eukaryotic cells use oxygen to harvest energy from food molecules. In what form is that energy available to power cell work? a.heat and light b.glucose molecules c.fat molecules d.ATP molecules

3. © 2010 Pearson Education, Inc. Concept Check Fat molecules store 9 kcal per gram. There are about 454 grams in a pound of fat, so one pound of fat stores about 4,000 kcal of energy. Based on the chart of energy consumption, which of the following would “burn off” a pound of fat, assuming your normal activities consumed calories equal to the rate of your calorie intake? a.running 7 miles b.swimming 2 miles c.walking 27 miles d.running about 40 miles

4. © 2010 Pearson Education, Inc. Concept Check The figure above represents an overview of the different processes of cellular respiration. Which of the following correctly identifies the different processes? a.1. glycolysis, 2. electron transport, 3. citric acid cycle b.1. glycolysis, 2. citric acid cycle, 3. electron transport c.1. citric acid cycle, 2. electron transport, 3. glycolysis d.1. electron transport, 2. glycolysis, 3. citric acid cycle

5. © 2010 Pearson Education, Inc. Concept Check The figure to the right represents an overview of the different entry pathways to cellular respiration when different macromolecules are digested for energy production. Why are none of the digestive products entering the electron transport chain directly? a.The electron transport chain is too deeply embedded in the mitochondria. b.The electron transport chain only receives electrons carried by reduced electron carrier molecules such as NADH. c.The electron transport chain only receives electrons carried by oxidized electron carrier molecules such as NAD+. d.The electron transport chain does not produce ATP.

6. © 2010 Pearson Education, Inc. Interpreting Data This graph illustrates the free energy relative to oxygen of the electron transport chain. The solid blue circles are electron carrier molecules and the light blue ovals represent protein complexes. In these reactions, is energy being absorbed (called “endergonic reactions”) or is energy being released (called “exergonic reactions”)? a.Reactions are endergonic. b.Reactions are exergonic. c.Some are exergonic and others are endergonic. d.There is not enough information.

7. © 2010 Pearson Education, Inc. Interpreting Data What would happen to the flow of electrons if oxygen were not present? a.The flow of electrons would continue but at a slower rate. b.The flow would cease and ATP production would stop. c.The absence of oxygen would have no effect.

8. © 2010 Pearson Education, Inc. Interpreting Data Cyanide binds strongly with the last electron carrier in the chain. How would this affect the flow of electrons? a.The flow of electrons would continue but at a slower rate. b.The flow would cease and ATP production would stop. c.The presence of cyanide would have no effect. ?

9. © 2010 Pearson Education, Inc. Biology and Society Obesity is a serious problem in the United States. This problem is growing the fastest in people under 30. The above table shows the percentage of children in the 6-to-11 and 12-to-19 age groups who were considered obese by year. Some link this obesity to fatty fast food and others link it to the increased consumption of soft drinks sweetened with high fructose corn syrup. Do you think that today’s students consume more soft drinks than they should? Strongly Agree Strongly Disagree A. E. C. B. D. Age1971-74 (%) 1976-80 (%) 1988-94 (%) 1999-2000 (%) 6-11471115 12-19651115

10. © 2010 Pearson Education, Inc. Biology and Society Do you think that your diet is primarily a healthy diet? Strongly Agree Strongly Disagree A. E. C. B. D.

11. © 2010 Pearson Education, Inc. Biology and Society There is some preliminary evidence that appears to indicate that a diet that provides barely enough calories for maintenance could extend your life span. This is called a calorie-restricted diet. Would you consider this type of diet to potentially increase your life span? Strongly Agree Strongly Disagree A. E. C. B. D.

12. © 2010 Pearson Education, Inc. Biology and Society One quick indicator of possible obesity is the Body Mass Index (BMI). Here is the formula for the BMI: BMI = [Weight in Pounds/(Height in Inches) 2 ] x 703 Calculate your BMI and enter where you fit in the following table—remember it is anonymous. BMIBelow 18.518.5-24.925.0-29.930.0 and above Weight Status A. Underweight B. Normal C. Overweight D. Obese