27. What is the role of oxygen in cellular respiration? A. Acts as the final electron acceptor in the electron transport chain B. Breaks down glucose during glycolysis C. Produces glucose in the Calvin cycle D. Produces carbon dioxide in the Krebs cycle 28. What process occurs in the cytoplasm? A. Glycolysis B. Krebs cycle C. Calvin cycle D. Electron transport chain 29. What are the two main stages of photosynthesis? A. Glycolysis and Krebs cycle B. Light-dependent reactions and Calvin cycle C. Krebs cycle and electron transport chain D. Photosynthesis and cellular respiration 30. What is the primary role of chlorophyll in photosynthesis? A. Store energy B. Absorb light energy C. Produce oxygen D. Convert carbon dioxide into glucose 31. What is the primary product of the Krebs cycle? A. Oxygen B. Pyruvate C. Energy carriers (NADH and FADH_(2)) D. Glucose 32. What type of organisms perform photosynthesis? A. Heterotrophs B. Consumers C. Autotrophs D. Decomposers 33. What structure in the leaf is responsible for gas exchange during photosynthesis? A. Stomata B. Xylem C. Phloem D. Petiole