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Biology revision notes - maintenance of life Most plant cells, like animal cells, have the following parts: * A nucleus which controls the activities of the cell * A cytoplasm in which most of the chemical reactions takes place * A cell membrane, which controls the passage of substance in and out of the cell. Plant cells also have: * A cell wall which strengthens the cell They also often have * Chloroplasts which absorb light energy to make food * A permanent vacuole filled with cell sap. Green plants use light energy to make their own food. They obtain the raw materials they need to make this food from the air and soil. Photosynthesis equation: Carbon dioxide + water [+ light energy] = glucose + oxygen. During photosynthesis: * Light energy is absorbed by a green substance called chlorophyll which is found in chloroplasts in some plant cells * This energy is used by converting carbon dioxide and water into sugar (glucose) * Oxygen...

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