Answer: Six molecules of CO2.
- A Six molecules of CO2
- B One molecule of CO2
- C Two molecules of CO2
- D Three molecules of CO2
Correct answer: A. Six molecules of CO2
Explanation: Six turns of the Calvin cycle, fixing six CO<sub>2</sub>, are needed to make one 6-carbon glucose.
Simplified photosynthesis diagram: light energy, CO2, and H2O enter the leaf and are converted in the chloroplast into glucose and O2.
Concept context
Light reactions, the Calvin cycle, C 3 /C 4 /CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.