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Anaerobic Respiration

Anaerobic Respiration. What happens when there isn’t enough oxygen to accept the H+ and e-?. Glucose + oxygen  carbon dioxide + water + ATP C 6 H 12 O 6 + 6O 2 + 38 ADP + 38 Pi  6 CO 2 + 6 H 2 O + 36 ATP. Carbon dioxide + water. Glucose. Aerobic Respiration. Glycolysis

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Anaerobic Respiration

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  1. Anaerobic Respiration What happens when there isn’t enough oxygen to accept the H+ and e-?

  2. Glucose + oxygen  carbon dioxide + water + ATP C6H12O6 + 6O2 + 38 ADP + 38 Pi  6 CO2 + 6H2O + 36 ATP Carbon dioxide + water Glucose Aerobic Respiration Glycolysis 2 ATP Pyruvic acid Krebs and ETC 36 ATP

  3. Glucose Anaerobic Respiration 2 ATP Pyruvic acid No oxygen as final H+ / e- acceptor • e- transport and Krebs cycle stop • pyruvate buildup

  4. Lactic acid Glucose Anaerobic respiration In animals 2 ATP Typically occurs in animals during prolonged exercise. Lactic acid causes muscle fatigue Pyruvic acid

  5. Ethanol + Carbon dioxide Anaerobic Fermentation in yeast & bacteria Glucose 2 ATP Pyruvic acid Normal way of life. Carbon dioxide release causes the bubbles in bread and beer

  6. Plenty of oxygen  Aerobic respiration • Lots of ATP ↑energy requirements  ↑ increase respiration rate  ↑ oxygen demand & ↑ CO2  ↑ breathing rate Low oxygen anaerobic respiration less ATP

  7. MENU Quick Quiz Key Words Videos MCQ Exercises

  8. Key words Back to menu • ATP • glycolysis • glucose • pyruvate • final acceptor • lactic fermentation • yeast fermentation • anaerobic

  9. QUICK QUIZ Back to menu • ____ respiration occurs in the absence of sufficient oxygen • Yeast undergoes ____ under anaerobic conditions • Animals produce ____ under anaerobic conditions Answers

  10. QUICK QUIZ Back to menu • anaerobicrespiration occurs in the absence of sufficient oxygen • Yeast undergoes fermentation under anaerobic conditions • Animals produce lactic acid under anaerobic conditions

  11. Exercise Back to menu • Workbook pp 67-72, all questions • Pathfinder p45 q5 • READING • Pathfinder p43 • Excellence in Biology 126-130

  12. Videos Back to menu

  13. Question 1 Back to menu 27 When living cells break down molecules, energy is a. stored as ADP b. released as heat c. stored as ATP d. Both b and c √

  14. Question 2 Back to menu 27 In cellular respiration, the most ATP is made during a. glycolysis b. lactic acid fermentation      c. the Krebs cycle       d. electron transport chain √

  15. Question 3 Back to menu 27 The breakdown of sugars to produce ATP and ethanol is known as a. respiration  b. alcoholic fermentation c. lactic-acid fermentation   d. photosynthesis √

  16. Question 4 Back to menu 27 Which of the following is not formed during Cellular Respiration? a. Oxygen b. ATP c.CO2 d. Water √

  17. Question 5 Back to menu 27 Which of the following is never part of cellular respiration? a. Fermentation          b. the Krebs cycle        c. glycolysis d. the Calvin cycle √

  18. Question 6 Back to menu 27 With enough oxygen present which of the following does not occur? a. glycolysis.           b.aerobic respiration  c. fermentation   d. All of the above √

  19. Question 7 Back to menu 27 An important molecule generated by both lactic acid and alcoholic fermentation is a. ATP                        b. CO2 c.NADH d. NAD+ √

  20. Question 8 Back to menu 27 Glycolysis takes place _____ a. in all cells  b. only if oxygen is present c. without oxygen d. only if oxygen is absent √

  21. Question 9 Back to menu 27 Yeast cells produce alcohol and CO2 in the process of _________ a. lactic acid fermentation    b. glycolysis c. aerobic respiration    d. alcoholic fermentation     √

  22. Question 10 Back to menu 27 Glycolysis takes place in the ____________ a. chloroplast     b. mitochondria               c. cytoplasm                d. nucleus √

  23. Question 11 Back to menu 27 Aerobic Respiration produces ____ molecules of ATP. a. 34                          b. 19                            c. 2   d. 63 √

  24. Question 12 Back to menu 27 Aerobic processes require _____ in order to take place. a. sunlight                b. oxygen                         c. water                d. carbon dioxide √

  25. Question 13 Back to menu 27 To maximize ATP production, glycolysis must be followed by a. fermentation        b. the Calvin cycle    c. aerobic respiration       d. photosynthesis √

  26. Question 14 Back to menu 27 When muscles are exercised extensively in the absence of sufficient oxygen a. oxidative respiration    b. ethanol is produced  c. glucose      d. lactic acid is produced √

  27. Question 15 Back to menu 27 What two organs do we store sugars in? a. muscles & heart    b. Liver & muscles   c. stomach & intestines   d. brain & spine √

  28. Correct Back to menu 31

  29. Incorrect Back to menu 32

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