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Concept explainers
Interpretation:
The open chain structure of glucose 6-phophate and fructose 6-phosphate that occurs in Step 2 of glycolysis process has to be drawn and verified.
Concept Introduction:
Glycolysis process: This process breakdown of glucose into pyruvic acid, this whole process generates two ATP’s.
This process serves as the foundation for both aerobic and anaerobic
Glucose is a six membered ring molecule founded in the blood and is usually a result of the breakdown of carbohydrates into sugars.
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Chapter 22 Solutions
Fundamentals of General, Organic, and Biological Chemistry, Books a la Carte Edition; Modified Mastering Chemistry with Pearson eText -- ValuePack ... and Biological Chemistry (4th Edition)
- Consider the following list of phosphorylated compounds with their free energy changes of phosphate hydrolysis: Glucose-1-phosphate (-5.0 kcal/mol), PEP (-14.8 kcal/mole), 1,3-bisphosphoglycerate (-11.8 kcal/mole) and Glucose-6-Phosphate (-3.3 kcal/mol). Given that the free energy change of ATP hydrolysis is -7.3 kcal/mole, which of these molecules be directly synthesized by the transfer of a phospho- group from ATP? 1,3-bisphosphoglycerate Glucose-6-phosphate All of those phosphorylated compounds. PEP Glucose-1-phosphatearrow_forwardDraw the structures of the activated carbon groups bound to thiamine pyrophosphate in three enzymes that contain this coenzyme. Hint: Keto–enol tautomerism may enter into the picture.arrow_forwardIdentify the three important products of the oxidative pentose phosphate pathway AND indicate how EACH product may be used within the cell.arrow_forward
- Explain how 2-deoxyglucose acts as an inhibitor of glycolysis?arrow_forwardConsider the following mechanism: What kind of reaction is occurring during this step of glycolysis? What metabolite is in Box 1? What metabolite is in Box 2? What metabolite is in Box 3? What enzyme catalyzes this reaction? Circle and label one place on the mechanism where covalent catalysis is occurring. Suggest an amino acid that could fill the role of residue “A” in the mechanism above and draw its structure at pH 7.4. Suggest an amino acid that could fill the role of residue “B” in the mechanism above and draw its structure at pH 7.4. Under standard conditions, this reaction is unfavorable (DG¢° = 23.8 kJ/mol). What conditions in the cell allow for the actual free energy change to be lower (DG » 0), making the reaction readily reversible? Explain your answer. *please help and explain as well as you can*arrow_forwardPlease describe the functions of the pentose phosphate pathway. Explain how NADPH functions in biosynthesis of fatty acid and deoxyribonucleotide.arrow_forward
- Match each reaction with its standard free‑energy change. What is the net standard free‑energy change of the payoff phase of glycolysis (with lactate as the end product)?arrow_forwardWrite balanced chemical equations for each of the following: (a) anaerobic glycolysis of 1 mole of sucrose, cleaved initially by sucrose phosphorylase; (b) aerobic glycolysis of 1 mole of maltose; (c) fermentation of one glucose residue in starch to ethanol, with the initial cleavage involving a-amylase.arrow_forwardIn the first stage of glycolysis, fructose-1,6-bisphosphate iscleaved to form glyceraldehyde-3-phosphate and dihydroxyacetone phosphate. The latter molecule can then be converted to glyceraldehyde-3-phosphate. Illustrate themechanisms whereby these reactions occurarrow_forward
- Indicate the energy yield or cost, in ATP equivalents, for the following processes: (a) glycogen (3 residues) → 6 pyruvate. (b) 3 glucose → 6 pyruvate(c) 6 pyruvate → 3 glucose.arrow_forwardThe M and H subunits of lactate dehydrogenase have very similar sizes and shapes but differ in amino acidcomposition. If the only difference between the two were that theH subunit had a glutamic acid in a position where the M subunithad a serine, how would the five isozymes of LDH separate on electrophoresis using a gel at pH 8.6?arrow_forwardSpecify the number of carbon atoms present and the number of phosphate groups present in each of the following glycolysis intermediates (3 points each) 1. Glucose 6 phosphate 2. Fructose 1, 6, phosphate 3. Glyceraldehyde 3-phosphate 4. 3-phospholglycerate 5. Fructose 6 phosphatearrow_forward
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