Question:
Statement A : Photorespiration decreases photosynthetic output
Statement B : In photorespiratory pathway, neither ATP nor NADPH is produced.
Statement A : Photorespiration decreases photosynthetic output
Statement B : In photorespiratory pathway, neither ATP nor NADPH is produced.
Updated On: Feb 23, 2024
- Both the statements A and B are correct.
- Both the statements A and B are wrong.
- Statement A is correct and statement B is wrong.
- Statement B is correct and statement A is wrong.
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The Correct Option is A
Solution and Explanation
Photorespiration is a cyclic process in which RuBisCO acts as an oxygenase enzyme instead of carboxylase enzyme. Active site of this enzyme is same for both of these activities. In $C_{3}$ plants, some $O_{2}$ always bind to RuBisCO
Photorespiration does not produce energy or reducing power. Rather, it consumes energy. Further, it undoes the work of photosynthesis. There is $25\%$ loss of fixed $CO_{2}$
Photorespiration does not produce energy or reducing power. Rather, it consumes energy. Further, it undoes the work of photosynthesis. There is $25\%$ loss of fixed $CO_{2}$
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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:
- Calvin Cycle (C3 Cycle)
- C4 Cycle (Hatch and Slack Pathway)