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(Fgure 13.4). These pigments help to make photosynthesis more efficient by absorbing different wavelengths of light. The single ghiorophyll amolecule forms the reaction centre. The reaction centre is aifferent in both the photosystems. IMPS I the reaction centre chlorophyt a has an absorpton peak at $700\mathrm{nm}$, hence is called P700, while in PS II it has absorption 13.6 The Electron Transport PS-I $\to$ Rex Cente-1 +LHC I Alomay In photosystem II the reaction centre chlorophyll a absorbs $680\mathrm{nm}$ ( 4 ingme] (B) Proxin the absorption wavelength of red light causing electrons to become excited and jump into an orbit farther from the atomic nucleus. These electrons are picked funchom $\to$ unve and the action No overufe up by an electron acceptor which passes them to an electrons transport job by $\mathrm{ch}-\mathrm{t}$ (ख) Single mocue he 6 \&

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Updated on: Feb 28, 2023