- A Carbon fixation occurring during the Calvin cycle stage
- B Light reactions (photo-phosphorylation)
- C Fatty acid synthesis occurring within the chloroplast stroma
- D Amino acid synthesis occurring within the chloroplast stroma
Correct answer: B. Light reactions (photo-phosphorylation)
Explanation: Thylakoid membranes contain photosystems I and II, electron transport chain, and ATP synthase: all light reaction components.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.