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Assertion: Leaf colouration is due to the presence of four pigments – Chlorophyll a, chlorophyll b, xanthophylls, and carotenoids. |
Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A). Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A). Assertion (A) is true and Reason (R) is false. Assertion (A) is false and Reason (R) is true. |
Assertion (A) is true and Reason (R) is false. |
The correct answer is Option (3) - Assertion (A) is true and Reason (R) is false. Chlorophyll a is found in all photosynthetic plants except bacteria. Hence, it is called a universal photosynthetic pigment. It is also called primary photosynthetic pigment because it performs the primary reaction of photosynthesis which involves the conversion of light into chemical energy. Other photosynthetic pigments like chlorophyll b, carotenes, and xanthophylls are called accessory pigments. |
