Which pigment absorbs the red and far-red light?

Step-by-step solution

Phytochrome is a pigment that absorbs red light and far-red light. Phytochrome has a light absorbing or light detecting portion (the chromophore) attached to small protein. Phytochrome occurs in 2 forms, i.e., P _r and P _ f r (i.e., red light and far-red light absorbing forms) and these 2 forms are interconvertible. Cytochromes are electron transferring proteins. They contain iron porphyrin or copper porphyrin as prosthetic groups. Chlorophyll is the fundamental green pigment of photosynthesis. It is localized on