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What is dark and light reaction please explain briefly |
| Answer» Photosynthesis is divided in two parts:1. Light-dependent reactions (light reactions)2. Light-independent reactions (dark reactions).Light reactions : As the name suggests, this reaction takes place in the presence of light. Light energy is absorbed by chlorophyll molecules and is utilized for splitting water molecules into hydrogen and oxygen. Additionally in this phase, assimilatory power in the form of ATP and NADPH2. Light reactions occur in the membranes of thylakoidsDark reactions : This reaction does not require direct light and occurs in the stroma of chloroplasts. Dark reactions make use of these organic energy molecules (ATP and NADPH). This reaction cycle is also called Calvin Benison Cycle, and it occurs in the stroma. ATP provides the energy, while NADPH provides the electrons required to fix the CO2(carbon dioxide) into carbohydrates. | |