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Identify A and B from the below figure.(a) A – Lumen; B – Thylakoids(b) A – Thylakoids; B – Lumen(c) A – Stroma; B – Grana(d) A – Grana; B – StromaThis question was addressed to me in an international level competition.This interesting question is from Chloroplast Structure and Function in portion Chloroplast Structure and Function of Cell Biology

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Correct ANSWER is (B) A – Thylakoids; B – Lumen

For explanation I would say: Thylakoids resemble the STRUCTURE of a coin, a STACK of thylakoids looks LIKE a stack of coins known as grana. The lumen is a connection between two or more grana.



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