NEETBotanyPhotosynthesis in Higher Plants
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Pigments that appear yellow and yellow-orange on a paper chromatogram are crucial for protecting chlorophyll a from photo-oxidation. Reason (R): These pigments absorb light and transfer the energy to chlorophyll a , acting as accessory pigments. In the light of the above statements, choose the most
Options
- ABoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- BBoth (A) and (R) are correct and (R) is the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
A. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
Step-by-step solution
Assertion (A) is correct: Pigments that appear yellow (xanthophylls) and yellow to yellow-orange (carotenoids) on a paper chromatogram are accessory pigments. One of their crucial functions is to protect chlorophyll a from photo-oxidation. Reason (R) is correct: These pigments also absorb light of different wavelengths and transfer the energy to chlorophyll a , which broadens the spectrum of light used for photosynthesis. However, (R) is not the correct explanation of (A). The fact that they transfer energy to chlo