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Questions- photosynthesis in higher plants Video Lecture - NEET

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1. What is photosynthesis in higher plants?
Ans. Photosynthesis is the process by which green plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose (a form of sugar) and oxygen. This process takes place in the chloroplasts of plant cells and is essential for the plant's growth and survival.
2. How does photosynthesis occur in higher plants?
Ans. Photosynthesis occurs in higher plants through a series of complex reactions. It starts with the absorption of sunlight by chlorophyll, a pigment present in chloroplasts. This sunlight energy is then used to split water molecules into hydrogen and oxygen. The hydrogen is combined with carbon dioxide to produce glucose, while oxygen is released as a byproduct.
3. What are the main factors affecting photosynthesis in higher plants?
Ans. Several factors can affect photosynthesis in higher plants. The intensity and quality of light, availability of carbon dioxide, temperature, and the presence of chlorophyll are the main factors. If any of these factors are limited or not optimal, it can significantly impact the rate of photosynthesis in plants.
4. What is the importance of photosynthesis in higher plants?
Ans. Photosynthesis is of utmost importance in higher plants as it is the primary source of energy for their growth and development. Through photosynthesis, plants produce glucose, which is used for various metabolic processes and as a building block for other organic compounds. Additionally, photosynthesis releases oxygen into the atmosphere, which is essential for the survival of all living organisms.
5. How does photosynthesis in higher plants contribute to the global carbon cycle?
Ans. Photosynthesis plays a crucial role in the global carbon cycle. During photosynthesis, plants absorb carbon dioxide from the atmosphere and convert it into glucose. This glucose is utilized by plants for energy and growth, while a portion of it is stored as carbon in plant tissues. When plants die or are consumed by animals, the stored carbon is released back into the atmosphere through respiration or decomposition, completing the carbon cycle.
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