The absorptive peaks in the absorption spectrum of chlorophyll b are at the wavelength of:
Correct answer: A. 453 nm and 642 nm
- A. 453 nm and 642 nm
- B. 430 nm and 662 nm
- C. 480 nm and 520 nm
- D. 500 nm and 700 nm
Explanation
Among the given options, the most accurate ones are 453 nm and 642 nm. These wavelengths represent the two main absorption peaks of chlorophyll b, showing its ability to absorb light efficiently in both the blue and red regions of the visible spectrum. This absorption pattern allows chlorophyll b to assist chlorophyll a in capturing a broader range of light energy for photosynthesis. While the other options refer to wavelengths either absorbed by chlorophyll a or in regions where absorption is minimal, the combination of 453 nm and 642 nm accurately reflects the true absorption behaviour of chlorophyll b.
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