The reaction catalysed by PFK-1 is important because it:You can respond onceis freely reversible and hence the enzyme can be used in glycolysis and gluconeogenesis.is the first committed step of, and the most important control element in, glycolysis.generates two 3-carbon molecules from a 6-carbon molecule, so that the pay-off phase of glycolysis occurs twice.generates two ATP molecules per glucose molecule that enters glycolysis.
Question
The reaction catalysed by PFK-1 is important because it:You can respond onceis freely reversible and hence the enzyme can be used in glycolysis and gluconeogenesis.is the first committed step of, and the most important control element in, glycolysis.generates two 3-carbon molecules from a 6-carbon molecule, so that the pay-off phase of glycolysis occurs twice.generates two ATP molecules per glucose molecule that enters glycolysis.
Solution
The reaction catalysed by PFK-1 is important because it is the first committed step of, and the most important control element in, glycolysis. This means that once this step occurs, the glucose molecule is committed to being broken down completely by the glycolytic pathway. This step is also a key point of regulation for glycolysis, allowing the cell to increase or decrease the rate of glucose metabolism as needed.
Similar Questions
PFK-1 catalyses the:You can respond oncedephosphorylation of fructose 1,6-bisphosphate to fructose 6-phosphatecleavage of fructose 1,6-bisphosphate into DHAP and GA-3-P.transfer of phosphate from PEP to ADP to generate pyruvate and ATP.phosphorylation of fructose 6-phosphate to fructose 1,6-bisphosphate.interconversion of glucose 6-phosphate and fructose 6-phosphate.dephosphorylation of fructose 2,6-bisphosphate to fructose 6-phosphatephosphorylation of fructose 6-phosphate to fructose 2,6-bisphosphate
PFK1 is a key enzyme in the mammalian glycolytic pathway. Discuss the effects of ATP, AMP, PEP and citrate on PFK1 activity and, therefore, on cellular metabolism more broadly (10 marks) Discuss the effects of fructose 2,6 bisphosphate on PFK1 activity and the significance of this regulation (5marks) Why is this step so heavily controlled? (5 marks)
The phosphorylation of glucose to glucose-6-P in the glycolysis pathway is catalyzed by glucokinase. Which enzyme in the gluconeogenesis pathway catalyzes the reverse reaction (G6P > Glucose)? A. Glukose-6-fosfatase / Glucose-6-phosphatase B. Piruvaatkinase / Pyruvate kinase C. Heksokinase / Hexokinase D. Fosfofruktokinase / Phosphofructokinase E. Fruktose-1,6-bifosfatase / Fructose-1,6-bisphosphatase
Parmi les réactions suivantes de la glycolyse, citez celles qui produisent l'ATP : 1/La réaction Catalysée par la phosphofructokinase 1 (PFK1). 2/La reaction catalysée par la phosphoglycérate kinase (PGK) 3/La transformation du phosphoénolpyruvate en pyruvate 4/La réaction catalysée par la glycéraldéhyde 3-phosphate déshydrogenase 5/L'isomérisation du dihydroxyacétone phosphate en glycéraldéhyde-3-phosphate.
The first ATP forming reaction in glycolysis is catalysed by which enzyme?Group of answer choicesglyceraldehyde 3-phosphate dehydrogenasephosphofructokinase-1phosphoglycerate kinasehexokinase
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.