A photosystem is made up of

(a) a granum together with the stroma lamellae Your answer
(b) a reaction centre without any antenna pigments Your answer
(c) a light harvesting complex without a reaction centre Your answer
(d) a reaction centre and a light harvesting complex Correct

Your answer: Correct answer: (d)

Explanation

Why (d) is correct

A photosystem consists of a light-harvesting complex (antenna of hundreds of pigment molecules) and a reaction centre (one chlorophyll a molecule) that uses the energy.

Why the other options are wrong

(a) · your answer A granum and stroma lamellae are parts of the chloroplast, not a photosystem.
(b) · your answer Antenna pigments are part of every photosystem.
(c) · your answer Without a reaction centre the absorbed energy could not be used.

NCERT point: The antenna molecules increase the area over which light is trapped.

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A photosystem is made up of

Explanation

Why (d) is correct

Why the other options are wrong

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