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Why would the stroma have a higher pH during photosynthesis?
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Lula Barnett
Why would the stroma have a higher pH during photosynthesis?
Energy from an electron transport chain is used to actively transport protons from the stroma to the thylakoid lumen. Thus the lumen has a relatively higher proton concentration and therefore a lower pH than the stroma.
Higher [H+] means lower pH.
Lower [H+] means higher pH.
Keep in mind that the flow of actively transported protons from the stroma to the lumen is against their concentration gradient. There wouldn't be a net flow of protons this way without active transport.
Energy from an electron transport chain is used to actively transport protons from the stroma to the thylakoid lumen. Thus the lumen has a relatively higher proton concentration and therefore a lower pH than the stroma.
Higher [H+] means lower pH.
Lower [H+] means higher pH.
Keep in mind that the flow of actively transported protons from the stroma to the lumen is against their concentration gradient. There wouldn't be a net flow of protons this way without active transport.
Energy from an electron transport chain is used to actively transport protons from the stroma to the thylakoid lumen. Thus the lumen has a relatively higher proton concentration and therefore a lower pH than the stroma.
Higher [H+] means lower pH.
Lower [H+] means higher pH.
Keep in mind that the flow of actively transported protons from the stroma to the lumen is against their concentration gradient. There wouldn't be a net flow of protons this way without active transport.
Energy from an electron transport chain is used to actively transport protons from the stroma to the thylakoid lumen. Thus the lumen has a relatively higher proton concentration and therefore a lower pH than the stroma.
Higher [H+] means lower pH.
Lower [H+] means higher pH.
Keep in mind that the flow of actively transported protons from the stroma to the lumen is against their concentration gradient. There wouldn't be a net flow of protons this way without active transport.
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