CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The rotation of the Krebs cycle turns a “rotor” in the cell to synthesize ATP
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ATP is synthesized by substrate level phosphorylation during the removal of the coenzyme A upon entrance into the cycle
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Krebs cycle completes the breakdown of glucose to release the energy and store it in the form of ATP
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High energy electrons are stored in NADH and FADH2 to shuttle to the ETC to generate a proton gradient
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Detailed explanation-1: -NADH and FADH2 molecules formed during Glycolysis and Krebs Cycle carry their electrons to the electron transport chain. The electron transport chain creates a proton gradient that ultimately leads to the production of a large amount of ATP.
Detailed explanation-2: -Although some ATP is generated via the GTP derived from the Krebs cycle, most of the ATP generated during aerobic respiration comes from oxidative phosphorylation. The NADH and FADH generated during the Krebs cycle fuels the electron transport chain which drives this process, ultimately producing 38 molecules of ATP.
Detailed explanation-3: -The electron transport chains are on the inner membrane of the mitochondrion. As the high-energy electrons are transported along the chains, some of their energy is captured. This energy is used to pump hydrogen ions(from NADH and FADH2) across the inner membrane, from the matrix into the intermembrane space.
Detailed explanation-4: -The electron transport chain uses the high-energy electrons from the Krebs cycle to convert ADP into ATP. High-energy electrons from NADH and FADH2 are passed along the electron transport chain from one carrier protein to the next.
Detailed explanation-5: -Cellular Respiration Stage III: Electron Transport Electron transport is the final stage of aerobic respiration. In this stage, energy from NADH and FADH2, which result from glycolysis and the Krebs cycle, is transferred to ATP.