PHOTOSYNTHESIS
THE CALVIN CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Pump protons (H+) from the interior of thylakoids to the stroma
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Pump protons (H+) from the stroma to the interior of thylakoids
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Break a water molecule (photolysis)
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reduce the proton (H+) gradient inside the thylakoid
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Detailed explanation-1: -As the electron passes along these proteins, energy from the electron fuels membrane pumps that actively move hydrogen ions against their concentration gradient from the stroma into the thylakoid space.
Detailed explanation-2: -Figure 10.4. 2: Energy from light is used by the chloroplast electron transport chain to pump protons across the thylakoid membrane into the lumen of the thylakoid. This creates a proton gradient that is used as a source of energy by ATP synthase.
Detailed explanation-3: -Energy from the electrons is used by proteins in the electron transport chain to pump H+ ions from the stroma into the thylakoid space. At the end of the electron transport chain, the electrons pass to photosystem I.
Detailed explanation-4: -A photon of light hits chlorophyll, causing an electron to be energized. The free electron travels through the electron transport chain, and the energy of the electron is used to pump hydrogen ions into the thylakoid space, transferring the energy into the electrochemical gradient.
Detailed explanation-5: -During the electron-transport process, H+ is pumped across the thylakoid membrane, and the resulting electrochemical proton gradient drives the synthesis of ATP in the stroma.