Question:
Warburg effect refers to
Warburg effect refers to
Updated On: Jul 7, 2022
- decreased photosynthetic rate at very high $O_{2}$ concentration
- increased photosynthetic rate at very high $O_{2}$ concentration
- decreased photosynthetic rate at very low $O_{2}$ concentration
- increased photosynthetic rate at very low $O_{2}$ concentration
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The Correct Option is A
Solution and Explanation
Oxygen is a product of photosynthesis, A small quantity of $O_{20}$ is essential for photosynthesis to take place. But as $O_{2}$ concentration rises, rate of photosynthesis decreases, which may be because (i) oxygen takes part in oxidation of photosynthetic pigments, intermediates and enzymes in the presence of strong light (photo-oxidation), (ii) oxygen is a strong quencher of excited state of chlorophyll. Oxygen competes with $CO_{2}$ for reducing power. It converts RuBP-carboxylase to RuBP-oxygenase. At very high oxygen concentration, the rate of photosynthesis begins to decline in all plants. This phenomenon is referred to as Warburg effect.
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Concepts Used:
Photosynthesis in Higher Plants
Processes Of Photosynthesis in Higher Plants:
Photosynthesis in higher plants involves the following processes:
- Light Reaction
- Dark Reaction
Light Reaction:
- This phenomenon occurs in the presence of light.
- The pigment absorbs light and produces energy in the form of ATP.
- The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.
Dark Reaction:
This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:
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