In the light reactions of photosynthesis, sunlight boosts electrons into a higher energy state, and those electrons are later used in making sugars. Where do chloroplasts get more electrons to replace those boosted by sunlight? O NADPH O CO? O NADH O H?O
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Step 1: The light reactions of photosynthesis involve the splitting of water molecules. Show more…
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Where do the electrons in NADPH+ that are used to reduce CO2 to sugar during photosynthesis ultimately come from? From H2O Light Carbohydrates
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Stage 1: Light energy is absorbed and stored in temporary chemical bonds. Low-energy electrons are removed from and boosted to high energy levels. The energized electrons flow through an electron transport chain. Stage 2: The stored energy in bonds is used to make organic molecules. High-energy electrons from are transferred to CO2. Overall, electrons flow from to CO2. Because electron carriers exist in very small amounts, NADPH must be oxidized to NADP+ in order for the light- reactions to continue to occur.
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Water is one of the substrates for the photosynthesis reaction, and the splitting of water yields electrons and hydrogen ions. After a full cycle of photosynthesis (including light reaction and dark reaction), in which compound do most of these electrons end up?
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