Q. A graph that plots the rate at which $CO_{2}$ is converted to glucose $versus$ the wavelength of light illuminating a leaf is called

A) An absorption spectrum
B) An adsorption spectrum
C) Pigment kinetics
D) An action spectrum
Explanation

Action spectrum. Though chlorophyll-a is the major pigment responsible for trapping light, other thylakoid pigments like chlorophyll-b, xanthophylls and carotenoids, which are called accessory pigments, also absorb light and transfer the energy to chlorophyll-a. Indeed, they not only enable a wider range of wavelength of incoming light to be utilised for photosynthesis but also protect chlorophyll-a from photooxidation

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.