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In plant cells, synthesis of ATP by the chemiosmoticmechanism occurs during
  • a)
    Photosynthesis only.
  • b)
    Respiration only.
  • c)
    Both photosynthesis and respiration. 
  • d)
    Photorespiration only.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In plant cells, synthesis of ATP by the chemiosmoticmechanism occurs d...
The chemiosmotic hypothesis explains how cells produce energy. It describes how, similar to respiration, photosynthesis also uses this method.
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In plant cells, synthesis of ATP by the chemiosmoticmechanism occurs d...
Overview of ATP Synthesis
In plant cells, ATP (adenosine triphosphate) synthesis through the chemiosmotic mechanism occurs during both photosynthesis and respiration. This process is crucial for energy production in cells.
Photosynthesis
- During photosynthesis, specifically in the thylakoid membranes of chloroplasts, light energy is converted into chemical energy.
- The light-dependent reactions generate a proton gradient by splitting water molecules (photolysis), releasing oxygen and pumping protons into the thylakoid lumen.
- As protons flow back into the stroma through ATP synthase, ATP is produced from ADP and inorganic phosphate.
Respiration
- In cellular respiration, which occurs in the mitochondria, glucose is broken down to produce ATP.
- The electron transport chain (ETC) creates a proton gradient across the inner mitochondrial membrane.
- Similar to photosynthesis, protons flow back into the matrix through ATP synthase, leading to ATP synthesis.
Conclusion
- The chemiosmotic mechanism, involving the generation of a proton gradient and subsequent ATP synthesis, is a fundamental process in both photosynthesis and respiration.
- Therefore, the correct answer is option 'C': ATP synthesis occurs during both photosynthesis and respiration in plant cells.
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In plant cells, synthesis of ATP by the chemiosmoticmechanism occurs duringa)Photosynthesis only.b)Respiration only.c)Both photosynthesis and respiration.d)Photorespiration only.Correct answer is option 'C'. Can you explain this answer?
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