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In a chloroplast, the stacked disc-like structures formed by thylakoids are called:
AStroma
BGrana
CCristae
DOxysomes
Answer & Solution
Correct answer: B. Grana
1. Thylakoids are membrane sacs inside the chloroplast.
2. When stacked one above another like discs they form a granum (plural grana).
3. So grana are the stacks.
4. Cristae are folds of the inner mitochondrial membrane, not the chloroplast, so that is the trap.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 12 Plant Anatomy and Plant Physiology "Structure of Chloroplast", p.187_
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