The photoautotrophic organisms that do not split water to obtain reducing power are
(1) purple bacteria
(3) green plants
(4) none of these
(1) NADPH is the reducing power of the cell. The release of oxygen and reduction of NADP+ is termed as photolysis or splitting of water. Eukaryotes (green plants) and cyanobacteria release oxygen by splitting of water (i.e., oxidation of water). In purple bacteria, the electron donors are some sulphur containing organic or inorganic compounds.