Glycolysis is the first step in cellular respiration. This step-by-step process is run with the help of 10 different enzymes as glucose is modified and eventually changed into two molecules of pyruvate. ATP is used and produced along the way. An accumulation of ATP that is not used by the cell can alter this process by interfering with the third enzyme, thus temporarily shutting or slowing glycolysis down. As ATP is used up by the cell and drops to a lower level, the interference with the third enzyme ceases and glycolysis continues. Such regulation of this metabolic pathway is the result of: a. catalytic feedback b. positive feedback c. negative feedback d. bioinformatics regulation
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Feedback regulation is a process in which the output of a system affects the input, either positively or negatively, to maintain a stable state or achieve a specific goal. In this case, the accumulation of ATP interferes with the third enzyme in the glycolysis Show more…
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Glycolysis is the stage of cellular respiration. It occurs in the cell's . Glucose, a molecule with carbons, is the starting compound. Glycolysis means " sugar." During glycolysis, glucose gets split apart into two -carbon molecules. The process involves reactions that power the reduction of the mobile carrier into . The net yield is production of molecules of ATP, and two molecules of . This molecule contains carbon atoms, and still has plenty of potential chemical energy to power the next stages of cellular respiration which are the cycle and the electron chain.
Madhur L.
Cellular Respiration is a process that occurs in the mitochondria of cells. It involves several steps, including glycolysis, pyruvate fermentation, the Krebs cycle, and the electron transport chain. Glucose is broken down during glycolysis, which occurs in the cytoplasm. This process produces ATP, NADH, and FADH molecules. Pyruvate can then undergo fermentation, either producing ethanol or lactic acid. In aerobic respiration, pyruvate is converted into acetyl CoA and enters the mitochondrial matrix. The Krebs cycle then oxidizes the acetyl CoA, producing carbon dioxide and more ATP, NADH, and FADH molecules. Finally, the electron transport chain uses these molecules to produce even more ATP. Overall, cellular respiration is an essential process that generates energy for cells.
Stage 1 Glycolysis occurs in the cytoplasm. The carbon atoms in glucose are converted to two molecules of pyruvate. Two NADH and four ATP form. Since the cell had to invest two ATP to begin the reaction, the net yield is two ATP. Stage 2 The second stage reactions, including the Krebs cycle, occur in the mitochondrion. Overall, the second stage reactions generate eight NADH and two FADH2. The six carbon atoms that originally entered aerobic respiration in molecules of glucose leave the cell as six molecules of CO2. Stage 3 Electron transfer phosphorylation occurs in the mitochondrion. NADH and FADH2 bring electrons to electron transfer chains. Energy lost by the electrons as they flow through the chains is used to move hydrogen ions across the inner membrane. The resulting gradient means that there are more hydrogen ions in the intermembrane space than in the matrix. Hydrogen ions flow from the area of high concentration to the area of low concentration through ATP synthases. This flow drives the creation of ATP.
Pahal S.
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