{"answerArea": {"calculator": false, "chi2Table": false, "periodicTable": false, "tTable": false, "zTable": false}, "hints": [{"content": "As electrons move down the ETC, some of the carriers transport H+ ions across the membrane to form a H+ gradient. This gradient drives ATP synthesis as the H+ ions move through ATP synthase.  ", "images": {}, "replace": false, "widgets": {}}, {"content": "The correct answer is\n\nThe movement of electrons down the ETC drives the formation of a proton gradient.", "images": {}, "replace": false, "widgets": {}}], "itemDataVersion": {"major": 0, "minor": 1}, "question": {"content": "The electron transport chain (ETC) is one part in oxidative phosphorylation, which is the last step in cellular respiration.\n\n**Which of the following is true of the ETC?**\n\n[[☃ radio 1]]", "images": {}, "widgets": {"radio 1": {"alignment": "default", "graded": true, "options": {"choices": [{"clue": "As electrons move down the ETC, some of the carriers transport H+ ions from one side of the membrane to the other which causes a H+ gradient to form across the membrane. This gradient is then used to drive ATP synthesis as the H+ ions move along their concentration gradient through the ATP synthase protein found in the membrane.  ", "content": "The movement of electrons down the ETC drives the formation of a proton gradient.", "correct": true}, {"clue": "During the ETC, it is the movement of electrons that drives the movement of H+ ions, not the other way around.", "content": "The movement of H+ ions across the inner membrane of the mitochondria drives the transfer of electrons down the ETC.", "correct": false}, {"clue": "During the ETC, the movement of electrons drives the movement of H+ ions, not the other way around.", "content": "The movement of H+ ions through ATP synthase drives the transfer of electrons down the ETC.", "correct": false, "isNoneOfTheAbove": false}, {"clue": "During the ETC, the movement of electrons drives the movement of H+ ions, not ADP and phosphate.", "content": "The movement of electrons down the ETC drives the movement of ADP and phosphate through ATP synthase.", "correct": false, "isNoneOfTheAbove": false}], "countChoices": false, "deselectEnabled": false, "displayCount": null, "hasNoneOfTheAbove": false, "multipleSelect": false, "randomize": false}, "static": false, "type": "radio", "version": {"major": 1, "minor": 0}}}}}