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Match List I with List II.
| List I | List II |
| P. Absorption spectrum | 1. Single chlorophyll a molecule that loses an excited electron |
| Q. Action spectrum | 2. Light absorbed by a pigment at different wavelengths |
| R. Reaction centre | 3. Pigments that pass energy to the reaction centre |
| S. Antenna | 4. Rate of photosynthesis at different wavelengths |
Your answer:
Correct answer: (b)
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Explanation
Why (b) is correct
Absorption spectrum: light absorbed at different wavelengths (2); action spectrum: rate at different wavelengths (4); reaction centre: single chlorophyll a that loses an excited electron (1); antenna: pigments passing energy to it (3). So P-2, Q-4, R-1, S-3.
Why the other options are wrong
- (a) · your answer This mixes up all four pairs.
- (c) · your answer This swaps the reaction centre and the antenna.
- (d) · your answer This swaps the absorption and action spectra.
NCERT point: Absorption spectrum = pigment; action spectrum = process.
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