PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the concentration gradient in the mitochondria
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gravity
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chemiosmosis
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the energy released by the movement of electrons through the electron transport chain
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Detailed explanation-1: -The passing of the electron in the first part of the electron transport chain causes protons to be pumped from the stroma to the thylakoid lumen. A concentration gradient formed (with a higher concentration of protons in the thylakoid lumen than in the stroma).
Detailed explanation-2: -H+ accumulates in the thylakoid space. The electrons from the reaction center are passed to the first electron transport chain. The electron transport chain pumps H+ ions into the thylakoid space.
Detailed explanation-3: -Active Transport: ATP Synthase is responsible for actively transporting H+ ions across the cell membrane. This type of movement is facilitated by the presence of a carrier protein, such as a hemoglobin molecule.
Detailed explanation-4: -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-5: -Answer and Explanation: The H+ generated during the light reactions A) build up inside the thylakoid membranes until they pass through an ATP synthase proton pump where the released energy helps make ATP.