The Essence of Photosynthesis is the Photochemical Event Which Is

Question

The essence of photosynthesis is the photochemical event which is: A) conversion of H2O to O2. B) reduction of NADP⁺. C) phosphorylation of ADP. D) light energy transduction to chemical energy. E) fixation of CO2.

Accepted Answer

The essence of photosynthesis is the conversion of light energy into chemical energy, which occurs during the photochemical event of photosynthesis. This converts light energy into chemical energy stored in the bonds of organic molecules such as carbohydrates. Option D is the correct choice as it accurately describes this process. Incorrect options: A) Conversion of H₂O to O₂ is not a process that occurs during photosynthesis. B) Reduction of NADP⁺ is a part of the light-independent reactions of photosynthesis, not the photochemical event. C) Phosphorylation of ADP is a part of the process of ATP synthesis and does not describe the photochemical event. E) Fixation of CO₂ is a process that occurs during the dark reaction of photosynthesis and not during the photochemical event.