Energy flow in chloroplasts

Référence de la vidéo 11937590
Energy flow in chloroplasts. Animation showing a simplified schematic representation of energy flow via electron transport chains in chloroplasts. Chloroplasts, found in plant cells, are the site of energy production and synthesis of sugars via photosynthesis. Here, sunlight (sun symbol) and water (H2O, blue box at lower left) combine in photosystem II (red box at left), with oxygen (O2, green box at lower left) the product. The energy is transferred via a proton gradient (blue box at top) created by the action of a proton pump (red oval). The energy is transferred to photosystem I (red box at right). The forces generated by the two photosystems are used to convert charged nicotinamide adenine dinucleotide phosphate (NADP-plus) to a reduced form of nicotinamide adenine dinucleotide (NADH, green box at upper right). This enters the carbon fixation cycle (yellow box at lower right) along with carbon dioxide (CO2, blue box at lower right). The end product is glucids (carbohydrates, blue box at lower centre) that are used by the plant as an energy source and store. The overall process is an electron transfer from water to sugars. For this animation with labels, see K004/3297.
Licence : Droits gérés
Crédit : Science Photo Library / Biocosmos / Francis Leroy & Sempot Amaury
Model Release : Non requis
Durée : 38 Secondes
Aspect ratio : 16/9
Restrictions : -

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