A) 780 nm
B) 680 nm
C) 690 nm
D) 550 nm
Correct Answer: A
Solution :
In 780 nm of wavelength photosystem-I is reactive. In photosystem-I, the photocentre is special chlorophyll-a molecule called \[{{P}_{700}}\]. PS-I has a reducing agent X, Fe-S centre, plastoquinone, cytochrome complex and piastocyanin. Part of the spectrum used in photosynthesis has a wavelength between 400-700 nm. In photosystem-II a very small amount of special form of chlorophyll-a, called \[{{P}_{680}}\] is present.
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