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31 maj 2023 · Redox occurs when both reduction and oxidation take place in the same chemical reaction. Some examples include combustion, decomposition, respiration and photosynthesis. And just as you would have guessed (or looked at the answer), photosynthesis is indeed a redox reaction that occurs in chloroplasts found in plants.
Because oxidation and reduction occur together (an electron being taken from somewhere must be given somewhere else), these pairs of reactions are called reduction-oxidation reactions, or redox reactions (Fig 23.1). Figure 23.1. Stages of oxidation/reduction of a single carbon.
Photosynthesis consists of two stages: the light-dependent reactions and the light-independent reactions or Calvin cycle. The light-dependent reactions occur when light is available. The overall equation for photosynthesis shows that is it a redox reaction; carbon dioxide is reduced and water is oxidized to produce oxygen.
Redox Reactions: Electrons that are released from chlorophylls P 700 and Peso pass from one to another of a series of electron transfer molecules in the lamellae. Each of these molecules has a specific electrical potential called a redox potential.
3 sie 2023 · Photosynthesis is a light-driven oxidation-reduction reaction where the energy from the light is used to oxidize water, releasing oxygen gas and hydrogen ions, followed by the transfer of electrons to carbon dioxide, reducing it to organic molecules.
Explain the relevance of photosynthesis to other living things. Identify the substrates and products of photosynthesis. Describe the main structures involved in photosynthesis. Relate the light-dependent and light-independent reactions.
To replace the electron in the chlorophyll, a molecule of water is split. This splitting releases two electrons and results in the formation of oxygen (O 2) and 2 hydrogen ions (H +) in the thylakoid space. The replacement of the electron enables chlorophyll to respond to another photon.
