Answer Happy

E. none of the above. 13. What is the net gain in ATP molecules produced during the reactions of glycolysis under anaerobic conditions? A. 2 B. 4 C. 6 D. 8 E 10 14. When a muscle cell is metabolizing glucose in the complete absence of molecular oxygen, which one of the following substances in not produced? A. heat BATP C.pyruvic acid D.lactic acid E. acetyl-CoA 15. Which metabolic pathway is a common pathway to both anaerobic and aerobic metabolism? A. The electron transport chain. B. The Krebs cycle. C. The oxidation of pyruvic acid. D. glycolysis E. none of the above. 16. Cyanide blocks the respiratory electron-transport chain. As a result A. the Krebs cycle speeds up. B electrons and hyd C. three ATPs are produced for every pair of electrons. D. production of water increases. E. glycolysis is inhibited. ens cannot flow from NADre to oxygen. 17. When glucose is broken down to carbon dioxide and water during aerobic respiration, more than 60% of its energy is released as A. oxygen. B. carbon dioxide. C. heat. D. ATP. E. NAD. h 18. In what stage of aerobic respiration do enzymes partially oxidize glucose and split it into two 3-carbon molecules? A. the electron transport system B. the Krebs cycle C.the Calvin cycle D.glycolysis

19. In what stage of aerobic respiration are protons and electrons passed on to NADH? A the electron transport system B.glycolysis C.The Calvin cycle D.the Krebs cycle 20. What is the decomposition reaction that occurs in the digestive systems of animals? A. hydrolysis B. Photosynthesis C. fermentation D. glycolysis 21. What are organisms that can survive for long periods of time with or without oxygen? A. facultative aerobes B. obligate anaerobes C. anaerobic bacteria. D. obligate aerobes 22. The Krebs cycle of cell respiration breaks down carbohydrates. What else occurs in the Krebs cycle? A. breakdown of fats and proteins B. synthesis of fats and proteins C. breakdown of minerals D. synthesis of vitamins 23. What is cell respiration that occurs with the aid of oxygen? A photorespiration B. anaerobic respiration C photoinhibition Daerobic respiration ts 24. What are the folds of the inner membrane of mitochondria that extend to the inside? A cristae B.stroma C. matrix D. grana 25. What is the major energy carrier in metabolism of organisms? A. Glucose B. chlorophyll C. ATP D. Glucagon