fényreakcióiban

Fényreakcióiban is a Hungarian term that translates to "in its light reactions" or "in their light reactions" in English. It specifically refers to the initial stages of photosynthesis where light energy is captured and converted into chemical energy. This process occurs within the thylakoid membranes of chloroplasts in plant cells and in other photosynthetic organisms.

During the light-dependent reactions, pigment molecules like chlorophyll absorb photons of light. This absorbed energy is used to excite electrons, which then move through an electron transport chain. This electron flow drives the synthesis of ATP (adenosine triphosphate), an energy-carrying molecule, and NADPH (nicotinamide adenine dinucleotide phosphate), a reducing agent. Water molecules are also split during this phase, releasing oxygen as a byproduct and providing electrons to replace those lost by chlorophyll. The term "fényreakcióiban" encapsulates this entire complex series of light-driven events essential for life on Earth. These reactions are the foundation upon which the subsequent Calvin cycle, or light-independent reactions, builds to produce sugars.