The main characteristic of the first stage of photosynthesis is the light dependent reactions in which solar energy is converted into chemical energy. Light absorbed by chlorophyll drives transfer of electrons and hydrogen from water molecules to an acceptor called NADP+ (nicotin-amide adenine dinucleotide phosphate) which temporarily stores the energized electrons. Water is spilt in the process and thus it is the light reactions of photosynthesis that give off oxygen as a by-product. The light reactions also generate ATP by powering addition of a phosphate group to ADP by a process called phosphorylation.
What is the main characteristic of the first stage of photosynthsis