Which of the following is NOT a stage of cellular respiration?

1. Which of the following is NOT a stage of cellular respiration? • fermentation • electron transport • glycolysis • Krebs cycle

2. Which of the following is the correct sequence of events in cellular respiration? • glycolysis ® fermentation ® Krebs cycle • Krebs cycle ® electron transport ® glycolysis • glycolysis ® Krebs cycle ® electron transport • Krebs cycle ® glycolysis ® electron transport

3. Which of the following is released during cellular respiration? • oxygen • air • energy • lactic acid

4. Cellular respiration uses one molecule of glucose to produce • 2 ATP molecules. • 34 ATP molecules. • 36 ATP molecules. • 38 ATP molecules.

5. What is the correct equation for cellular respiration? • 6O2 + C6 H12 O6 ® 6CO2 + 6H2 O + Energy • 6O2 + C6 H12 O6 + Energy ® 6CO2 + 6H2 O • 6CO2 + 6H2 O ® 6O2 + C6 H12 O6 + Energy • 6CO2 + 6H2 O + Energy ® 6O2 + C6 H12 O6

6. Cellular respiration releases energy by breaking down • food molecules. • ATP. • carbon dioxide. • water.

7. What are the reactants in the equation for cellular respiration? • oxygen and lactic acid • carbon dioxide and water • glucose and oxygen • water and glucose

8. Which of these is a product of cellular respiration? • oxygen • water • glucose • all of the above

9. Which of these processes takes place in the cytoplasm of a cell? • glycolysis • electron transport • Krebs cycle • all of the above

10. Glycolysis provides a cell with a net gain of • 2 ATP molecules. • 4 ATP molecules. • 18 ATP molecules. • 36 ATP molecules.

11. The starting molecule for glycolysis is • ADP. • pyruvic acid. • citric acid. • glucose.

12. Glycolysis requires • an energy input. • oxygen. • hours to produce many ATP molecules. • NADP+.

13. Which of the following is NOT a product of glycolysis? • NADH • pyruvic acid • ATP • glucose

14. Which of the following acts as an electron carrier in cellular respiration? • NAD+ • pyruvic acid • ADP • ATP

15. Lactic acid fermentation occurs in • bread dough. • any environment containing oxygen. • muscle cells. • mitochondria.

16. The two main types of fermentation are called • alcoholic and aerobic. • aerobic and anaerobic. • alcoholic and lactic acid. • lactic acid and anaerobic.

17. One cause of muscle soreness is • alcoholic fermentation. • glycolysis. • lactic acid fermentation. • the Krebs cycle.

18. Which process is used to produce beer and wine? • lactic acid fermentation • glycolysis • alcoholic fermentation • the Krebs cycle

19. Milk is converted to yogurt under certain conditions when the microorganisms in the milk produce acid. Which of these processes would you expect to be key in the production of yogurt? • the Krebs cycle • photosynthesis • alcoholic fermentation • lactic acid fermentation

20. During lactic acid fermentation, • NAD+ is regenerated, allowing glycolysis to continue. • glucose is split into three pyruvic acid molecules. • oxygen is required. • 3 ATP molecules are produced.

21. The conversion of pyruvic acid into lactic acid requires • alcohol. • oxygen. • ATP. • NADH.

22. In the presence of oxygen, glycolysis is followed by • lactic acid fermentation. • alcoholic fermentation. • photosynthesis. • the Krebs cycle.

23. Cellular respiration is called an aerobic process because it requires • light. • exercise. • oxygen. • glucose.

24. Which organism is NOT likely to carry out cellular respiration? • tree • mushroom • anaerobic bacterium • tiger

25. The starting molecule for the Krebs cycle is • glucose. • NADH. • pyruvic acid. • coenzyme A.

26. The Krebs cycle does not occur if • oxygen is present. • fermentation occurs. • glycolysis occurs. • carbon dioxide is present.

27. The Krebs cycle produces • oxygen. • lactic acid. • electron carriers. • glucose.

28. The Krebs cycle starts with • lactic acid and yields carbon dioxide. • glucose and yields 32 ATPs. • pyruvic acid and yields lactic acid or alcohol. • pyruvic acid and yields carbon dioxide.

29. The electron transport chain can be found in • prokaryotes. • animals. • plants. • all of the above

30. In eukaryotes, electron transport occurs in the • mitochondria. • chloroplasts. • cell membrane. • cytoplasm.

31. Which of the following passes high-energy electrons into the electron transport chain? • NADH and FADH2 • ATP and ADP • citric acid • acetyl – CoA

32. Each pair of high-energy electrons that moves down the electron transport chain provides enough energy to • transport water molecules across the membrane. • convert 3 ADP molecules into 3 ATP molecules. • convert carbon dioxide into water molecules. • break glucose into pyruvic acid.

33. The energy of the electrons passing along the electron transport chain is used to make • lactic acid. • citric acid. • alcohol. • ATP.

34. Breathing heavily after running a race is your body’s way of • making more citric acid. • repaying an oxygen debt. • restarting glycolysis. • recharging the electron transport chain.

35. When the body needs to exercise for longer than 90 seconds, it generates ATP by carrying out • lactic acid fermentation. • alcoholic fermentation. • cellular respiration. • glycolysis.

36. If you want to control your weight, how long should you exercise aerobically each time that you exercise? • at least 90 seconds • less than 15 minutes • 15 to 20 minutes • more than 20 minutes

37. The energy needed to win a 2-minute footrace is produced mostly by • lactic acid fermentation. • cellular respiration. • using up stores of ATP. • breaking down fats.

38. Which statement mainly explains why even well-conditioned athletes have to pace themselves for athletic events that last several hours? • Lactic acid fermentation can cause muscle soreness. • Heavy breathing is needed to get rid of lactic acid. • Cellular respiration releases energy more slowly than fermentation does. • all of the above

39. All of the following are sources of energy during exercise EXCEPT • stored ATP. • alcoholic fermentation. • lactic acid fermentation. • cellular respiration.

40. Which process does NOT release energy from glucose? • glycolysis • photosynthesis • fermentation • cellular respiration

41. How are cellular respiration and photosynthesis almost opposite processes? • Photosynthesis releases energy, and cellular respiration stores energy. • Photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back. • Photosynthesis removes oxygen from the atmosphere, and cellular respiration puts it back. • all of the above

42. Photosynthesis is to chloroplasts as cellular respiration is to • chloroplasts. • cytoplasm. • mitochondria. • nuclei.

43. Unlike photosynthesis, cellular respiration occurs in • animal cells only. • plant cells only. • all but plant cells. • all eukaryotic cells.

44. Plants cannot release energy from glucose using • glycolysis. • photosynthesis. • the Krebs cycle. • cellular respiration.

45. The products of photosynthesis are the • products of cellular respiration. • reactants of cellular respiration. • products of glycolysis. • reactants of fermentation.

46. Cellular respiration releases energy by breaking down glucose in the presence of carbon dioxide. _________________________ • True • False

47. If an animal cell stops carrying out cellular respiration, it will die. _________________________ • True • False

48. The products of glycolysis are 2 ATP, 2 NADH, and 2 pyruvic acid molecules. _________________________ • True • False

49. Either cellular respiration or fermentation can be used to release energy, depending on the presence of carbohydrates. _________________________ • True • False

50. The pathway labeled A in Figure 9–1 is called glycolysis. ______________________________ • True • False Figure 9-1