NEET Biology question

Which of the following statements is true with regard to the light reaction of the photosynthetic mechanism in plants?

(A)Chlorophyll-a occurs with a peak absorption at 680 nm in photosystem-I and at 700 nm in photosystem-II
(B)Magnesium and sodium ions are associated with the photolysis of water molecules
(C)Oxygen is evolved during cyclic photophosphorylation
(D)Photosystem-I and II are both involved in non-cyclic photophosphorylationCorrect

Answer: (D)

Solution

PS-I's peak is actually at 700 nm and PS-II's at 680 nm (the reverse of (a)); the ions required for photolysis of water are manganese and chloride, not magnesium and sodium (so (b) is wrong); and oxygen evolution

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Question ID VK-128079