Where is glycolysis located in the cell

With four molecules produced and two molecules consumed in the process, there is a net yield of two ATP from each glucose molecule in glycolysis. If you've found an issue with this question, please let us know.

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Correct answer: Cytosol. Explanation : Glycolysis happens in the cytosol the fluid containing the organelles of the cell. Report an Error. Example Question 2 : Cellular Respiration. Which of the following reflects a function of fermentation? It leads to the production of ethanol in muscle cells. It leads to the production of lactic acid in yeast cells. Fermentation leads to the production of ethanol in yeast cells and lactic acid in muscle cells.

Example Question 3 : Cellular Respiration. Explanation : Glycolysis occurs in the cytosol of cells. Example Question 1 : Understanding Glycolysis. How many direct ATP are made if fructose-1,6-bisphosphate is put through glycolysis? Possible Answers: 4. Correct answer: 4. Explanation : The conversion of glucose to two pyruvate molecules in glycolysis produces a net total of two direct ATP. Example Question 5 : Cellular Respiration. Which of the following products is not created during glycolysis?

Possible Answers: Oxygen. Correct answer: Oxygen. Explanation : Glycolysis is the first step in cellular respiration, and is seen in both aerobic and anaerobic respiration. Example Question 6 : Cellular Respiration. Which of the following processes does not take place during glycolysis? One molecule of glucose eventually yields two molecules of pyruvate. Correct answer: Via a complex chain of steps, and transfer electrons to the process's final electron acceptor,.

Explanation : Glycolysis, which occurs in the cytoplasm, is the first step of cellular respiration. Example Question 7 : Cellular Respiration. This image is linked to the following Scitable pages:. Cells generate energy from the controlled breakdown of food molecules. Learn more about the energy-generating processes of glycolysis, the citric acid cycle, and oxidative phosphorylation. Comments Close. The Comment you have entered exceeds the maximum length.

Submit Cancel. Comments Please Post Your Comment. No comments yet. Save Note Note. Save Cancel Delete. A carbonyl group on the 1,3-bisphosphoglycerate is oxidized to a carboxyl group, and 3-phosphoglycerate is formed. Step 8. In the eighth step, the remaining phosphate group in 3-phosphoglycerate moves from the third carbon to the second carbon, producing 2-phosphoglycerate an isomer of 3-phosphoglycerate.

The enzyme catalyzing this step is a mutase isomerase. Step 9. Enolase catalyzes the ninth step. This enzyme causes 2-phosphoglycerate to lose water from its structure; this is a dehydration reaction, resulting in the formation of a double bond that increases the potential energy in the remaining phosphate bond and produces phosphoenolpyruvate PEP.

Step Many enzymes in enzymatic pathways are named for the reverse reactions, since the enzyme can catalyze both forward and reverse reactions these may have been described initially by the reverse reaction that takes place in vitro, under non-physiological conditions. Gain a better understanding of the breakdown of glucose by glycolysis by visiting this site to see the process in action. Two ATP molecules were used in the first half of the pathway to prepare the six-carbon ring for cleavage, so the cell has a net gain of two ATP molecules and 2 NADH molecules for its use.

If the cell cannot catabolize the pyruvate molecules further, it will harvest only two ATP molecules from one molecule of glucose. Mature mammalian red blood cells are not capable of aerobic respiration —the process in which organisms convert energy in the presence of oxygen—and glycolysis is their sole source of ATP.

If glycolysis is interrupted, these cells lose their ability to maintain their sodium-potassium pumps, and eventually, they die. The last step in glycolysis will not occur if pyruvate kinase, the enzyme that catalyzes the formation of pyruvate, is not available in sufficient quantities. In this situation, the entire glycolysis pathway will proceed, but only two ATP molecules will be made in the second half. Thus, pyruvate kinase is a rate-limiting enzyme for glycolysis.

Glycolysis is the first pathway used in the breakdown of glucose to extract energy. It was probably one of the earliest metabolic pathways to evolve and is used by nearly all of the organisms on earth. Glycolysis consists of two parts: The first part prepares the six-carbon ring of glucose for cleavage into two three-carbon sugars.

ATP is invested in the process during this half to energize the separation. Two ATP molecules are invested in the first half and four ATP molecules are formed by substrate phosphorylation during the second half.