TREE PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are pumped actively through the ATP synthase. This uses ATP energy and causes the production of ADP and phosphate.
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They flow through the Calvin cycle and produce light.
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Hydrogen ions do not actually flow from the thylakoid space to the stroma. They flow the opposite way.
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They flow passively from the high to low concentration via facilitated diffusion. As they flow through ATP synthase, the enzyme spins and produces ATP.
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Detailed explanation-1: -Why do hydrogen ions flow from the thylakoid space to the stroma through ATP synthase? A. They are pumped actively through ATP synthase. This uses up ATP energy and causes the production of ADP and phosphate.
Detailed explanation-2: -The ions flow through ATP synthase from the thylakoid space into the stroma in a process called chemiosmosis to form molecules of ATP, which are used for the formation of sugar molecules in the second stage of photosynthesis.
Detailed explanation-3: -Hydrogen ions have a positive charge. Like in magnets, the same charges repel, so the hydrogen ions want to get away from each other. They escape the thylakoid through a membrane protein called ATP synthase. By moving through the protein they give it power, like water moving through a dam.
Detailed explanation-4: -At the inner mitochondrial membrane, a high energy electron is passed along an electron transport chain. The energy released pumps hydrogen out of the matrix space. The gradient created by this drives hydrogen back through the membrane, through ATP synthase.
Detailed explanation-5: -Answer and Explanation: The movement of protons (H+) down a concentration gradient through ATP synthase occurs from the inter-membrane space of the mitochondria (where protons accumulate) to the mitochondria matrix, passing through ATP synthase located on the mitochondria’s inner membrane.