Antagonist binds to the enzyme at a site far away from the receptor site to inhibit the function of an enzyme. Select one: O True O False Glycolysis is a reductive process because glucose is reduced to form pyruvate. Select one: O True O False Hexokinase catalyses an irreversible reaction in glycolysis.
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- Draw OUT THE arrow pushing reaction mechanism for the following steps of glycolysis: SHOW/IDENTIFY the arrow pushing mechanism in at least 2 steps. CH,OPO CH,OH hexokinase 2+ H H H H H H ОН + ATP OH H ADP + H+ H ОН + НО HO OH H ОН H ОН Glucose-6-phosphate (G6P) GlucoseSort the following metabolic enzymes according to those involved only in glycolysis and those involved only in gluconeogenesis. (Note: Some of the enzymes may not be used.) Items (10 items) (Drag and drop into the appropriate area below) Fructose-1,6- bisphosphatase- 1 Categories Phosphoglycerat e kinase Aldolase Glycolysis Only Pyruvate kinase Enolase Gluconeogenesis Only Phosphofructoki nase-1 Phosphoenol uvate carboxykinasConsider an alternative glycolysis pathway that starts with the phosphorylation of glucose to give glucose-6-phosphate. This (hypothetical) pathway exists in a (hypothetical) organism that does not express glucose-6-phosphate isomerase. Instead, the next step of this hypothetical pathway is a Glucose-6-Phosphate Aldolase. Draw the product or products that would be obtain by the reaction of Glucose – 6 – Phosphate with Glucose – 6 Phosphate Aldolase. Assume the reaction is completely irreversible. Explain in 1-3 sentences how you obtained your answer
- Phosphofructokinase-1 is the main flux controlling enzyme for glycolysis. It is inhibited by high [ATP]. There exist metabolic circumstances in which the inhibition by ATP is overridden. Draw velocity vs. [S] graphs showing the inhibition of PFK-1 activity by ATP and the circumstance in which the inhibition by ATP is overridden.Indicate what will happen (increase, decrease or no effect) to the activity of enzyme or rate of the metabolic pathway given the following conditions: 1. release of glucagon in the blood to the activity of carnitine acyl transferase 1 2. phosphorylation of acetyl CoA carboxylase 3. low [carbon dioxide]/[oxygen gas] ratio to the oxygenase activity of RuBisCOVon Gierke’s disease is also known as glycogen storage disease type I. Patients with von Gierke’s disease lackglucose 6-phosphatase activity. Two prominent symptoms of this disorder are fasting hypoglycemia and lactic acidosis (elevated lactate levels in the blood), especially during strenuous exercise. Explain why these symptoms occur. What chemical reaction does this enzyme catalyze? Which pathways involve this enzyme? Lacking thisthe enzyme will cause impairment of which pathways?• Pls consider what pathways are affected by Von Gierke’s disease. Include in your explanation involving Cori’s cycle. can you please do not write by your hand? I mean computer if you can. thank you
- Von Gierke’s disease is also known as glycogen storage disease type I. Patients with von Gierke’s disease lackglucose 6-phosphatase activity. Two prominent symptoms of this disorder are fasting hypoglycemia and lactic acidosis (elevated lactate levels in the blood), especially during strenuous exercise. Explain why these symptoms occur. What chemical reaction does this enzyme catalyze? Which pathways involve this enzyme? Lacking thisenzyme will cause impairment of which pathways?• Pls consider what pathways are affected by Von Gierke’s disease. Include in your explanation involving the Cori’s cycle.Although both hexokinase and phosphofructokinase catalyze irreversible steps in glycolysis and the hexokinase-catalyzed step is first, phosphofructokinase is nonetheless the pacemaker of glycolysis. What does this information tell you about the fate of the glucose 6-phosphate formed by hexokinase? Glucose 6-phosphate must be unstable and release its phosphoryl group over time. Glucose 6-phosphate must be utilized by other metabolic pathways. Glucose 6-phosphate must allosterically inhibit phosphofructokinase, but not hexokinase. Glucose 6-phosphate must be wasted when it is produced in excess.The glycolytic pathway is regulated by a number of key enzymes. Describe the various substrates and hormones that act on these enzymatic steps and the type of regulation (e.g. allosteric etc.).
- Indicate the general type of enzyme that mediates each glycolysis reaction depicted below. (e.g. Transferase, Oxidoreductase, Kinase, Hydrolase, Lyase, or Isomerase) iii. O H Glyceraldehyde-3-phosphate → 1,3-Bisphosphoglycerate H-C-OH + NAD CH₂O-P + P₁ H-O- -C-H Glucose →→ Glucose-6-phosphate H b 0 OH HO OH H-C- 0 -H HO- H ОН H-C-OH + NADH +H+ CH₂O P P ATP ADP 1 H (P-O- -C- H H HO OH 2-Phosphoglycerate → Phosphoenolpyruvate 0 OH H ОН -O~(P) + HOHWhat is meant by reciprocal regulation ? Name one compound that reciprocally regulates glycolysis and gluconeogenesis pathways . Which enzymes are regulated by this compound? What reactions are catalyzed by these enzymes (structures not required) ?The following nutrient molecule is digested and transported to a cell where it undergoes further catabolism: HO HO он OH HO- OH OH OH In the table below, list the important products of the complete glycolysis of this molecule. • In the first column of the table, write the chemical formula, name, or standard biochemical symbol for a product molecule. In the second column, write the total number of these molecules produced. Add Row • Only list the important products, including (1) molecules with any of the carbon atoms originally in the molecule above, (2) energy storage molecules (like ATP), and (3) any newly oxidized or reduced coenzymes. • List each product molecule on a separate row. You can add more rows to the table if you need them. • Be sure you write the number of product molecules formed by the complete glycolysis of the molecule above. • If the molecules does not undergo glycolysis at all, check the box under the table and leave the table blank. product (name, chemical…