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Audio Notes Photosynthesis in Higher Plants Video Lecture - NEET

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FAQs on Audio Notes Photosynthesis in Higher Plants Video Lecture - NEET

1. What is the overall equation for photosynthesis in higher plants?
Ans. The overall equation for photosynthesis in higher plants can be represented as: 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂. This indicates that carbon dioxide and water, in the presence of light, are transformed into glucose and oxygen.
2. What role do chloroplasts play in photosynthesis?
Ans. Chloroplasts are specialised organelles in plant cells that carry out photosynthesis. They contain chlorophyll, which captures light energy, and are the site where the light-dependent and light-independent reactions occur, ultimately producing glucose and oxygen.
3. What are the two main stages of photosynthesis?
Ans. The two main stages of photosynthesis are the light-dependent reactions and the light-independent reactions (Calvin cycle). The light-dependent reactions take place in the thylakoid membranes and convert light energy into chemical energy in the form of ATP and NADPH. The light-independent reactions occur in the stroma and utilise ATP and NADPH to synthesise glucose from carbon dioxide.
4. How does light intensity affect the rate of photosynthesis?
Ans. Light intensity significantly affects the rate of photosynthesis; as light intensity increases, the rate of photosynthesis also increases until it reaches a saturation point. Beyond this point, other factors such as carbon dioxide concentration and temperature may become limiting, preventing any further increase in the rate of photosynthesis.
5. What is the significance of the Calvin cycle in photosynthesis?
Ans. The Calvin cycle, also known as the light-independent reactions, is crucial for fixing carbon dioxide into organic compounds. It uses ATP and NADPH produced in the light-dependent reactions to convert carbon dioxide into glucose, which serves as an energy source for the plant and, ultimately, for other organisms in the food chain.

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