Biology · Plant Physiology - Photosynthesis
A plant is grown in a closed chamber where CO2 level gradually decreases, O2 level gradually increases, and temperature is kept high. After a few hours, the plant shows reduced sugar production and increased release of CO2. What is the most likely explanation?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Non-cyclic photophosphorylation has completely shut down.
- 2Glycolysis has replaced photosynthesis as the main pathway.
- 3Photorespiration has increased due to RuBisCO acting as an oxygenase.✓
- 4Calvin cycle is completely stopped due to lack of ATP.
Correct answer
Photorespiration has increased due to RuBisCO acting as an oxygenase.
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