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Which division of labour inside the chloroplast is correct?

(a) Outer membrane traps light; inner membrane makes sugar. Your answer
(b) Membranes trap light and make ATP and NADPH; stroma makes sugar. Correct
(c) Membranes make sugar; stroma traps light. Your answer
(d) Stroma traps light and makes ATP; membranes make starch. Your answer

Your answer: Correct answer: (b)

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Explanation

Why (b) is correct

Inside the chloroplast, the membranes trap light energy and make ATP and NADPH, and the stroma uses them to make sugar (enzymatic reactions).

Why the other options are wrong

(a) · your answer The envelope membranes neither trap light nor make sugar.
(c) · your answer This reverses the roles.
(d) · your answer This reverses the roles.

NCERT point: Membrane system: light reactions. Stroma: biosynthetic phase.

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