Photosynthesis in Higher Plants
ICSE · Class 11 · Biology
Most important questions from Photosynthesis in Higher Plants for ICSE Class 11 Biology board exam 2026. MCQs, short answer, and long answer questions with marks.
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The dark reaction of photosynthesis takes place in the:
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Stroma of chloroplast
The dark reaction (Calvin cycle) takes place in the stroma of the chloroplast, where all necessary enzymes for CO2 fixation are located.
The light reaction of photosynthesis occurs in the:
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Thylakoid membranes / Grana
The light reaction occurs on the thylakoid membranes within the grana of the chloroplast. This is where pigments are located and light energy is captured.
Chlorophyll a is the primary photosynthetic pigment.
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True
Chlorophyll a is the primary (main) photosynthetic pigment. It is the only pigment directly involved in the light reaction's photochemical act at the reaction centre.
What is the first stable product of the Calvin (C3) cycle?
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3-Phosphoglycerate (3-PGA)
3-PGA (3-phosphoglycerate) is the first stable 3-carbon compound formed when CO2 combines with RuBP via RuBisCo in the Calvin cycle.
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