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How is ATP made in the light reactions?

Updated: 4/28/2022
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14y ago

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In the light reaction, when electrons are transferred from photosystem 1 to photosystem 2, it goes through an electron transport chain. This ETC pumps protons into the thykaloid. Those protons diffuse out of the thykaloid through ATP synthase which energizes a phosphate group to bond to ADP. This creates ATP.

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14y ago
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14y ago

ATP is made by adding a phosphate group to adenosine diphosphate, or ADP.

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Q: How is ATP made in the light reactions?
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The Calvin cycle is powered by ATP and NADPH. During photosynthesis there are light reactions and this is when ATP and NADPH are manufactured.


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An electron transport chain is gone through when electrons are transferred from photosystem 1 to photosystem 2. ETC pumps protons through the thykaloid. Protons are diffused out of the thykaloid and through the ATP synthase.


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ATP and NADPH


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The phases where light energy is converted into ATP are called light reactions. I don't know if you want information on what happens then or not, though.


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How are the dark reactions that occur in plants dependent on the light reactions?

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