There is a clear division of labour within the chloroplast because:

Easy

A

Thylakoid membrane is responsible for producing sugars and stroma for trapping light energy
B

Light reactions occur in stroma and dark reactions in grana
C

Thylakoid membrane is responsible for trapping light energy and stroma for producing sugars
D

Light reactions occur in stroma and dark reactions in cytoplasm

Solution

Within the chloroplast there is membranous system consisting of grana, the stroma lamellae, and the stroma. There is a clear division of labour within the chloroplast. The membrane system is responsible for trapping the light energy and also for the synthesis of ATP and $NADPH + H^{+}$ . In stroma, enzymatic reactions synthesize sugar, which in turn forms starch.

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