Photosynthesis — Important Questions
Maharashtra Board · Class 11 · Biology
44 important questions from Photosynthesis for Maharashtra Board Class 11 Biology, with answers. Part of the Maharashtra Board Class 11 Biology syllabus.
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Important Questions from Photosynthesis
Which components are produced during the light reaction of photosynthesis?
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ATP, NADPH₂, Oxygen
The light reaction produces ATP (energy currency), NADPH₂ (reducing power), and oxygen (as a byproduct of water splitting). Glucose is produced in the dark reaction, not the light reaction.
The overall equation for photosynthesis is: 6CO₂ + 12H₂O → C₆H₁₂O₆ + 6O₂ + 6H₂O
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True
This is the correct balanced equation for photosynthesis, showing that carbon dioxide and water are converted to glucose and oxygen in the presence of light and chlorophyll.
Which factors can limit the rate of photosynthesis?
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Light intensity, Carbon dioxide concentration, Temperature, Water availability
According to Blackman's law of limiting factors, light, CO₂, temperature, and water can all act as limiting factors for photosynthesis. Soil pH indirectly affects plant health but is not a direct limiting factor for photosynthesis.
Photorespiration occurs when the enzyme Rubisco acts as an oxygenase instead of a carboxylase.
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True
Photorespiration occurs when Rubisco binds with oxygen instead of carbon dioxide, especially under conditions of high temperature, bright light, and low CO₂ concentration. This is a wasteful process for the plant.
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