Which out of the following statements is incorrect ?

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Grana lamellae have both PS I and PS II

Cyclic photophosphorylation involves both PS I and PS II

Both ATP and NADPH⁺ H⁺ are synthesised during non-cyclic photophosphorylation

Stroma lamellae lack PS II and NADP reductase

answer is B.

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Detailed Solution

Cyclic photophosphorylation is a light-dependent process that occurs in the thylakoid membrane of chloroplasts
during photosynthesis. It involves only photosystem I (PS I) and does not involve photosystem II (PS II).
(1) Grana lamellae, which are stacked thylakoid membranes within the chloroplasts, contain both photosystem I (PS I) and photosystem II (PS II). These photo systems are protein complexes embedded in the thylakoid membranes
and are involved in the light-dependent reactions of photosynthesis.
(3) Non-cyclic photophosphorylation involves both photosystem I (PS I) and photosystem II (PS II) working together
to capture and convert light energy into chemical energy in the form of ATP and NADPH + H⁺.
(4) Stroma lamellae are regions of the chloroplast thylakoid system that connect the grana stacks. Unlike the
grana lamellae, the stroma lamellae do not contain Photosystem II (PS II) or NADP reductase.

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