Photosynthesis — Important Questions
ICSE · Class 10 · Biology
42 important questions from Photosynthesis for ICSE Class 10 Biology, with answers. Includes multiple choice and multiple correct questions.
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See them allImportant Questions from Photosynthesis
Which raw materials are needed for photosynthesis?
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Carbon dioxide, Water, Sunlight
The raw materials for photosynthesis are carbon dioxide (from air), water (from soil), and sunlight (energy source). Oxygen and glucose are products, not raw materials.
What causes stomata to open during the day?
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Guard cells become turgid
During day, photosynthesis in guard cells produces glucose, making cell sap hypertonic. Water enters by endosmosis, making guard cells turgid and causing stomata to open.
Which pigment is most important for photosynthesis?
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Chlorophyll
Chlorophyll is the most important photosynthetic pigment. It traps solar energy and has a magnesium-containing head. Carotene and xanthophyll are accessory pigments.
During which process is water split into hydrogen and oxygen?
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Photolysis
Photolysis is the process of breaking down water molecules into H+ and OH- ions using light energy. This occurs during the light reaction in thylakoids.
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