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Stages of photosynthesis. When chlorophyll a absorbs light energy, an electron gains energy and is 'excited'. The excited electron is transferred to another molecule (called a primary electron acceptor). The chlorophyll molecule is oxidized (loss of electron) and has a positive charge.
In other words, the reaction center chlorophyll molecules transfer electrons with their absorbed energy rather than just transferring the energy (as the antenna chlorophyll molecules do). This electron transfer is the step in photosynthesis that converts light energy into electrical energy.
PHOTOSYNTHESIS: • converts light energy to the chemical energy of food 6CO2 + 6H2O + light energy C6H12O6 + 6O2. Happens in all green parts of plants but leaves = major site ~ about half a million chloroplasts/mm2 of leaf surface. Color of leaf due to green pigment chlorophyll.
27 sie 2022 · Photosynthesis is one of the most incomparable and meticulous metabolic processes that maximize the use of available light, carbon and nitrogen and minimizes the destructive effects of surplus...
The Light-Dependent Reactions: Generating ATP and NADPH. Photosynthesis begins with these reactions, which occur in thylakoid membranes. Photosystems are clusters of proteins and chlorophyll in thylakoid membranes. High-energy electrons form when pigments in photosystem II absorb light.
presence of sunlight. This process requires a photosynthetic pigment (chlorophyll) and can only occur in certain organisms. In plants, photosynthesis occurs in a specialised organelle called the chloroplast and involves two main stages: the light dependent reactions and the light independent reactions (Calvin cycle). CHLOROPLAST
• To make glucose, sunlight is captured in pigments like chlorophyll, the substance that gives leaves their green color. • The sun’s energy is passed through a chain of events that breaks water (H
