Write out the reaction that is catalyzed by phosphofructokinase (Glycolysis Step 3).
phosphofructokinase converts fructose-6-phosphate to fructose-1,6-bisphosphate by transferring one phosphate group from ATP to fructose-6-phosphate so the reaction is
Write out the reaction that is catalyzed by phosphofructokinase (Glycolysis Step 3).
please explain answer Glycolysis. In the third step of glycolysis, the enzyme phosphofructokinase transfers a phosphate group from ATP to fructose-6-phophate to generate fructose- 1,6- bisphosphate. In contrast, in step 10, the enzyme pyruvate kinase transfers a phosphate group from phosphoenolpyruvate to ADP to generate ATP. Using what you know about the standard free energy change associated with phosphate bonds, (briefly) explain why we observe this difference.
9) It turns out that cells are able to turn glycolysis on or off according to its needs in other words, cells can regulate glycolysis). (a) It would make more sense for a cell to turn on glycolysis whenever it (needs or already has plenty of ) ATPs. (b) Briefly explain your answer to part a. (c) It would make more sense for a cell to turn off glycolysis whenever it (needs or already has plenty of ATPs. (d) ATP...
What is the first catalyzed step in glycolysis and what are the important metabolic roles this step achieves for the transport of glucose and priming glycolysis?
Question 30 (1 point) The enzyme phosphofructokinase is the major regulatory enzyme of glycolysis. What reaction does it catalyze? the phosphorylation of fructose 6- phosphate. the substrate-level phosphorylation reaction whereby phosphoenolpyruvate is converted to pyruvate the isomerization of glucose 6-phosphate to fructose 6-phosphate. the first of the 10 reactions of glycolysis.
Question 30 (1 point) The enzyme phosphofructokinase is the major regulatory enzyme of glycolysis. What reaction does it catalyze? o the phosphorylation of fructose 6-phosphate the substrate-level phosphorylation reaction whereby phosphoenolpyruvate is converted to pyruvate 0 the isomerization of glucose 6-phosphate to fructose 6-phosphate. 0 the first of the 10 reactions of glycolysis. 0
1.Which step of glycolysis is catalyzed by phosphoglucose isomerase? What is the chemical “reason” for this reaction in glycolysis? (2) 2. Calculate values of Km and Vmax for PGI. (4) 3. How long (in seconds) does a single catalytic event take? (2) The enzyme phosphoglucose isomerase (PGI) catalyzes the following reaction in glycolysis сH,ОРО,?- Phosphoglucose2-03POH2C сH,он н Н isomerase но Н Н он Н он он но но Н он Н Glucose 6-phosphate Fructose 6-phosphate Kinetics experiments were performed on...
29. The activity of the enzyme phosphofructokinase is a) stimulated by low energy charge b) inhibited by fructose 2,6-bisphosphate c stimulated by fructose 1.6-bisphosphate d) all of the above 30. NADH is produced at a) aldolase catalyzed reaction b) Glyceraldehyde-3-phosphate dehydrogenase catalyzed reaction c) pyruvate kinase catalyzed reaction d) hexokinase catalyzed reaction 31. The transfer of 3-phosphoglycerate to 2-phosphoglycerate is catalyzed by which enzyme? a) PGM b)PK c)G2PDH d)TPI e)PFK 32. The enzyme aldolase catalyzes which reaction in Glycolysis? a)...
The enzyme phosphofructokinase-1 (PFK-1) catalyzes the 3rd reaction in glycolysis. When AMP concentrations are very high, AMP binds to PFK-1, activating it. This is an example of: 1) competitive inhibition 2) allosteric activation 3) allosteric inhibition 4) direct feedback inhibition 5) end-product inhibition 6) both allosteric inhibition and end-product inhibition
Write out the reaction catalyzed by the E2 enzymatic component of the pyruvate dehydrogenase complex. Describe the specific role of each cofactor in this reaction.
Which of the following enzyme catalyzes the first step of glycolysis? * Hexokinase Pyruvate kinase Glucokinase Phosphofructokinase-1