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During the light-dependent reactions, ATP is produced by the Photosystem II electron transport chain. According to the chemiosmosis theory, as the electrons are transported down the electron transport chain, some of the energy released is used to pump protons across the thylakoid membrane from the stroma of the chloroplast to the thylakoid interior space. this produces a proton concentration gradient or proton motive force. Since protons (hydrogen ions) are positively charged, this will lead to the accumulation of a positive charge in the interior of the membranes. As the accumulating protons in the thylakoid interior space pass back across the thylakoid membrane to the stroma through ATP synthetase complexes, this proton motive force is used to generate ATP from ADP and Pi For an excellent account see: http://student.ccbcmd.edu/biotutorials/photosyn/ldr.html

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16y ago
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2w ago

The inside of the thylakoid membrane becomes positively charged during light-dependent reactions because the movement of electrons along the electron transport chain creates a proton gradient across the membrane. This proton gradient is used to generate ATP through the process of chemiosmosis.

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14y ago

It becomes positive because ATP synthase allows H+ ions to pass through the membrane.

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13y ago

H posotive biulds up in the space as water is split

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12y ago

b. ATP synthase allows H+ ions to pass through the membrane.

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13y ago

H+ ions are released as water splits

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13y ago

h+ ions are released as water splits

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Q: Why does the inside of the thylakoid membrane become positively charged during light-dependent reactions?
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Related questions

The enzymes for the light dependent reactions are found in the thylakoid membrane while the Calvin cycle happens in the what?

The Calvin cycle happens in the stroma of the chloroplast.


Place where light reactions occur?

Light reactions occur in the thylakoid membranes of the chloroplasts in plant cells. Here, light energy is absorbed by chlorophyll and other pigments to drive the conversion of light energy into chemical energy, in the form of ATP and NADPH, which are used in the Calvin cycle to produce sugars.


What are locations of the light reactions?

On the thylakoid membrane :)


What membrane do light dependent reactions take place?

Light-dependent reactions in photosynthesis take place in the thylakoid membrane of chloroplasts. This membrane contains pigments such as chlorophyll that absorb light energy and convert it into chemical energy in the form of ATP and NADPH.


Where is the site of the photosystems in the light-dependent reactions of photosynthesis?

The photosystems in the light-dependent reactions of photosynthesis are located in the thylakoid membranes of the chloroplast. Photosystem I and Photosystem II are embedded in the thylakoid membrane and are responsible for capturing and converting light energy into chemical energy.


Where does the light reaction happens?

Light reactions occur in the cells chloroplast


In which structure of chloroplast do the light-dependent reactions occur?

The light reactions occur in the thylakoid space, which can also be called the granum.


Where is the location of the dark reactions in photosynthesis?

The dark reactions of photosynthesis, also known as the Calvin cycle, take place in the stroma of the chloroplasts in plant cells. Here, carbon dioxide is fixed and converted into glucose with the help of ATP and NADPH produced during the light reactions.


Where do light-independent reactions take place?

In the thylakoid membrane in chloroplasts.


Where do light dependent reactions occur in the chloroplast?

In the inner thylakoid membrane of the chloroplasts.


Where are enzymes associated with light dependent reactions of photosynthesis located?

Enzymes associated with the light-dependent reactions of photosynthesis are located in the thylakoid membranes of the chloroplasts. Key enzymes involved include ATP synthase, cytochrome b6f, and the enzyme complexes involved in the photosystems (PSII and PSI). These enzymes work together to capture light energy and convert it into chemical energy in the form of ATP and NADPH.


Where does the is the light-dependent reactions of photosynthesis take place in the membrane of thylakoid discs?

mitochondria