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NCERT Textbook Photosynthesis in Higher Plants - Biology Class 11 - NEET
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FAQs on NCERT Textbook: Photosynthesis in Higher Plants - Biology Class 11 - NEET
| 1. What is the process of photosynthesis in higher plants? |  |
Ans. Photosynthesis is the process by which higher plants, algae, and some bacteria convert light energy into chemical energy. In this process, plants use sunlight, carbon dioxide from the air, and water from the soil to produce glucose and oxygen. The overall equation for photosynthesis can be summarized as: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2. This process takes place mainly in the chloroplasts of plant cells, where chlorophyll captures light energy.
| 2. What are the main stages of photosynthesis? | |
Ans. Photosynthesis occurs in two main stages: the light-dependent reactions and the light-independent reactions (Calvin cycle). In the light-dependent reactions, which take place in the thylakoid membranes of the chloroplasts, sunlight is absorbed and converted into chemical energy in the form of ATP and NADPH. During this stage, water is split, releasing oxygen as a byproduct. In the light-independent reactions, which occur in the stroma of the chloroplasts, the ATP and NADPH produced are used to convert carbon dioxide into glucose through a series of chemical reactions.
| 3. How does light intensity affect photosynthesis? | |
Ans. Light intensity is a crucial factor affecting the rate of photosynthesis. As light intensity increases, the rate of photosynthesis typically increases until it reaches a certain point, beyond which it plateaus. This is because higher light intensity provides more energy for the light-dependent reactions. However, if the light intensity becomes too high, it can cause damage to the chlorophyll and other cellular structures, leading to a decrease in the rate of photosynthesis.
| 4. What role do chlorophyll and other pigments play in photosynthesis? | |
Ans. Chlorophyll is the primary pigment involved in photosynthesis, located in the chloroplasts of plant cells. It absorbs light energy, primarily in the blue and red wavelengths, and reflects green light, which is why plants appear green. Other pigments, such as carotenoids, also play a role by capturing additional light energy and protecting the plant from damage caused by excessive light. These pigments work together to maximize the absorption of light energy, thereby enhancing the efficiency of photosynthesis.
| 5. What are the factors that affect the rate of photosynthesis in higher plants? | |
Ans. Several factors influence the rate of photosynthesis, including light intensity, carbon dioxide concentration, temperature, and water availability. Light intensity affects the energy available for photosynthesis, while carbon dioxide concentration is necessary for the Calvin cycle. Temperature influences the enzymatic reactions involved in photosynthesis; generally, higher temperatures increase the rate up to an optimal point before enzymes become denatured. Lastly, water is essential for the process, particularly in the light-dependent reactions, where it is split to release oxygen.
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Document Description: NCERT Textbook: Photosynthesis in Higher Plants for NEET 2026 is part of Biology Class 11 preparation. The notes and questions for NCERT Textbook: Photosynthesis in Higher Plants have been prepared according to the NEET exam syllabus. Information about NCERT Textbook: Photosynthesis in Higher Plants covers topics like and NCERT Textbook: Photosynthesis in Higher Plants Example, for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for NCERT Textbook: Photosynthesis in Higher Plants.
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