In noncyclic photophosphorylation , the pigment molecules first excited is

Options

A. `P_(680)`
B. `P_(700)`
C. Chlorophyll-b
D. Xanthophyll

Answer

A

Explanation

Green plants and algae use two types of photosysntems, PS-I with chl. `P_(700)` in its reaction centre and `PS-II` with `P_(680)` in its reaction centre the two photosystems are linked by a chain of electron carriers. Light excites `P_(680)` of PS-II to activate `P_(680)`.