Relationship between photosynthesis and respiration Original Scenario-Based Download PDF

Questions

1. 1.

   A xenobotanist constructs a sealed, self-sustaining miniature biosphere containing bioluminescent algae and microscopic herbivorous aquatic organisms under alternating cycles of artificial light and darkness. Over extended monitoring, the total quantities of carbon, hydrogen, and oxygen atoms inside the sphere remain constant while both populations flourish. Which statement best explains the metabolic relationship that maintains this closed living system?

   • A) Photosynthesis uses the carbon dioxide and water released by cellular respiration to produce glucose and oxygen, which respiration then consumes to generate ATP.
   • B) Photosynthesis and cellular respiration both function to convert radiant light energy directly into chemical energy stored within ATP molecules.
   • C) Cellular respiration breaks down water to release oxygen gas, which photosynthesis subsequently captures to generate organic carbon compounds.
   • D) Photosynthesis operates as a catabolic pathway to release chemical energy, while cellular respiration acts as an anabolic pathway that stores radiant energy.