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Audio Notes: Photosynthesis in Higher Plants
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FAQs on Audio Notes: Photosynthesis in Higher Plants
| 1. What are the main stages of photosynthesis in higher plants? |  |
Ans. The main stages of photosynthesis in higher plants are the light-dependent reactions and the light-independent reactions (Calvin cycle). In the light-dependent reactions, chlorophyll absorbs light energy, which is used to split water molecules, releasing oxygen and generating ATP and NADPH. In the Calvin cycle, ATP and NADPH are utilised to convert carbon dioxide into glucose.
| 2. How do chloroplasts contribute to photosynthesis? | |
Ans. Chloroplasts are organelles in plant cells where photosynthesis occurs. They contain chlorophyll, the pigment responsible for capturing light energy. Chloroplasts have a double membrane and internal structures called thylakoids, where light-dependent reactions take place, and the stroma, where the Calvin cycle occurs, facilitating the conversion of light energy into chemical energy.
| 3. What role does carbon dioxide play in photosynthesis? | |
Ans. Carbon dioxide is a crucial reactant in photosynthesis. During the light-independent reactions (Calvin cycle), carbon dioxide is fixed and converted into glucose using the energy from ATP and NADPH produced in the light-dependent reactions. This process not only provides energy for the plant but also contributes to the carbon cycle in the environment.
| 4. Why is oxygen considered a by-product of photosynthesis? | |
Ans. Oxygen is considered a by-product of photosynthesis because it is produced during the light-dependent reactions when water molecules are split to release electrons and protons. The oxygen generated is not used by the plant for photosynthesis; instead, it is released into the atmosphere, contributing to the air we breathe.
| 5. 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 typically increases up to a certain point, known as the light saturation point, where the rate levels off. Beyond this point, additional light does not enhance photosynthesis as other factors, such as carbon dioxide concentration and temperature, may become limiting.
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Apr 19, 2026 Last updated
Audio Description: Audio Notes: Photosynthesis in Higher Plants for NEET 2026 is part of Biology Class 11 preparation. The notes and questions for Audio Notes: Photosynthesis in Higher Plants have been prepared according to the NEET exam syllabus. Information about Audio Notes: Photosynthesis in Higher Plants covers all important topics for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Audio Notes: Photosynthesis in Higher Plants.
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