Q121MCQ
A pigment which absorbs red and far-red light is (1997)
📖 Explanation
Phytochrome is a specialized photoreceptive pigment found in plants that alternates between two interconvertible forms to detect red and far-red light environments. The molecule consists of a light-absorbing chromophore attached to a protein component, allowing the plant to perceive photoperiodic stimuli and regulate developmental processes like flowering. Other pigments like carotenes and xanthophylls primarily function as accessory light-harvesters in photosynthesis rather than serving as red and far-red light sensors.