d) Observe the image given below and identify A, B, C, and D.
029A Stus
С
B
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Answer:
D
A-Photo-system II; B- e
−
acceptor; C-e
−
transport system; D- photo-system I; E- NADPH.
A. In the non-electron transport pathway, the light energy of specific wavelengths is absorbed by chlorophylls and accessory pigments of PS II. These pigments transfer their absorbed energy to PS II reaction centre- P
680
.
B. The reaction centre- P
680
becomes photoexcited and exudes an electron with a gain of energy. The electron is immediately accepted by the primary acceptor quinone.
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