Photosynthesis in C3 plants is reduced in the presence of excessive:
Correct answer: A. Oxygen
- A. Oxygen
- B. Rubisco
- C. Carbon dioxide
- D. Glyceraldehyde-3-phosphate
Explanation
In C3 plants, photosynthesis can be reduced by high levels of oxygen due to a process known as photorespiration. During photorespiration, rubisco, the enzyme responsible for fixing carbon dioxide, can instead bind to oxygen, leading to a less efficient conversion of energy. This reduces the overall efficiency of photosynthesis.
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About Plant Nutrition and Transport
Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
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