General, Organic, and Biological Chemistry - 4th edition
4th Edition
ISBN: 9781259883989
Author: by Janice Smith
Publisher: McGraw-Hill Education
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Question
Chapter 24, Problem 26P
Interpretation Introduction
(a)
Interpretation:
The reason due to which an isomerase enzyme is used in the conversion of mannose-6-phosphate to fructose-6-phosphate needs to be explained.
Concept Introduction:
- Enzymes are biological catalysts that
speed up the reactions taking place within the cells. - Isomers are the compounds with same molecular formula but different arrangement of atoms.
- Mannose (C6H12O6) is −
- Fructose (C6H12O6) is −
Interpretation Introduction
(b)
Interpretation:
The type of isomers represented by mannose-6-phosphate and fructose-6-phosphate needs to be explained.
Concept Introduction:
- Enzymes are biological catalysts that speed up the reactions taking place within the cells.
- Isomers are the compounds with same molecular formula but different arrangement of atoms.
- Mannose (C6H12O6) is −
- Fructose (C6H12O6) is −
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TPP is a coenzyme for transketolase, the enzyme that catalyzes the conversion of a ketopentose (xylulose- 5-phosphate) and an aldopentose (ribose-5-phosphate) to an aldotriose (glyceraldehyde-3-phosphate) anda ketoheptose (sedoheptulose-7-phosphate). Notice that the total number of carbons in the reactants and products is the same (5 + 5 = 3 + 7). Propose a mechanism for this reaction.
TPP is a coenzyme for transketolase, the enzyme that catalyzes the conversion of a ketopentose (xylulose5-phosphate) and an aldopentose (ribose-5-phosphate) to an aldotriose (glyceraldehyde-3-phosphate) and a ketoheptose (sedoheptulose-7-phosphate). Notice that the total number of carbons in the reactants and products is the same (5 + 5 = 3 + 7). Propose a mechanism for this reaction.
Draw the following compounds: Cellobiose: 2 glucose β-1,4
Chapter 24 Solutions
General, Organic, and Biological Chemistry - 4th edition
Ch. 24.2 - Analyze the following reaction by considering the...Ch. 24.2 - Prob. 24.2PPCh. 24.3 - Prob. 24.1PCh. 24.3 - Prob. 24.2PCh. 24.3 - Prob. 24.3PCh. 24.3 - Prob. 24.4PCh. 24.3 - Prob. 24.5PCh. 24.3 - Prob. 24.6PCh. 24.4 - Prob. 24.7PCh. 24.4 - Prob. 24.8P
Ch. 24.4 - Prob. 24.9PCh. 24.5 - Prob. 24.10PCh. 24.5 - Prob. 24.11PCh. 24.5 - Prob. 24.12PCh. 24.6 - Prob. 24.13PCh. 24.7 - Prob. 24.14PCh. 24.7 - Prob. 24.3PPCh. 24.7 - Prob. 24.15PCh. 24.7 - Prob. 24.16PCh. 24.7 - Use the number of molecules of ATP formed from the...Ch. 24.7 - Prob. 24.18PCh. 24.8 - Prob. 24.19PCh. 24.8 - Prob. 24.20PCh. 24.8 - Prob. 24.21PCh. 24.9 - Prob. 24.4PPCh. 24.9 - What products are formed when each amino acid is...Ch. 24.9 - Prob. 24.22PCh. 24 - Analyze each reaction by considering the...Ch. 24 - Analyze each reaction by considering the...Ch. 24 - Prob. 25PCh. 24 - Prob. 26PCh. 24 - Prob. 27PCh. 24 - Prob. 28PCh. 24 - Prob. 29PCh. 24 - Prob. 30PCh. 24 - Prob. 31PCh. 24 - Prob. 32PCh. 24 - Glucose is completely metabolized to six molecules...Ch. 24 - Why is glycolysis described as an anaerobic...Ch. 24 - Write the overall equation with key coenzymes for...Ch. 24 - Prob. 36PCh. 24 - Prob. 37PCh. 24 - Prob. 38PCh. 24 - Consider the aerobic and anaerobic avenues of...Ch. 24 - Prob. 40PCh. 24 - Prob. 41PCh. 24 - Prob. 42PCh. 24 - Prob. 43PCh. 24 - Prob. 44PCh. 24 - Prob. 45PCh. 24 - Prob. 46PCh. 24 - Prob. 47PCh. 24 - Prob. 48PCh. 24 - Prob. 49PCh. 24 - Prob. 50PCh. 24 - Prob. 51PCh. 24 - Prob. 52PCh. 24 - Prob. 53PCh. 24 - Prob. 54PCh. 24 - Prob. 55PCh. 24 - Prob. 56PCh. 24 - Prob. 57PCh. 24 - Prob. 58PCh. 24 - Prob. 59PCh. 24 - How much ATP is generated by the complete...Ch. 24 - Prob. 61PCh. 24 - Fill in the boxes with the number of moles of each...Ch. 24 - Prob. 63PCh. 24 - Prob. 64PCh. 24 - Prob. 65PCh. 24 - Prob. 66PCh. 24 - Prob. 67PCh. 24 - Prob. 68PCh. 24 - Prob. 69PCh. 24 - Prob. 70PCh. 24 - What is the difference between ketogenic and...Ch. 24 - Prob. 72PCh. 24 - Prob. 73PCh. 24 - Draw the structure of the keto acid formed by the...Ch. 24 - Draw the products formed in each transamination...Ch. 24 - Prob. 76PCh. 24 - Prob. 77PCh. 24 - Prob. 78PCh. 24 - Prob. 79PCh. 24 - Prob. 80PCh. 24 - What metabolic intermediate is formed from the...Ch. 24 - What metabolic intermediate is formed from the...Ch. 24 - Prob. 83PCh. 24 - Prob. 84PCh. 24 - Prob. 85PCh. 24 - Prob. 86PCh. 24 - Prob. 87PCh. 24 - What is the cause of the pain and cramping in a...Ch. 24 - Prob. 89PCh. 24 - Prob. 90PCh. 24 - Prob. 91PCh. 24 - Prob. 92PCh. 24 - Prob. 93PCh. 24 - Prob. 94PCh. 24 - What type of enzyme would catalyze the conversion...Ch. 24 - Prob. 96PCh. 24 - Prob. 97CPCh. 24 - Prob. 98CPCh. 24 - Prob. 99CPCh. 24 - Prob. 100CP
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- One of the steps in the pentose phosphate pathway for glucose catabolism is the reaction of xylulose 5-phosphate with ribose 5-phosphate in the presence of a transketolase to give glyceraldehyde 3-phosphate and sedoheptulose 7-phosphate. (a) The first part of the reaction is nucleophilic addition of thiamin diphosphate (TPP) ylide to xylulose 5-phosphate, followed by a retro-aldol cleavage to give glyceraldehyde 3-phosphate and a TPPcontaining enamine. Show the structure of the enamine and the mechanism by which it is formed. (b) The second part of the reaction is addition of the enamine to ribose 5-phosphate followed by loss of TPP ylide to give sedoheptulose 7-phosphate. Show the mechanism.arrow_forwardConsider fructose-1-phosphate, fructose-1,6-bisphosphate, and fructose-2,6-bisphosphate. Identify which are reducing and which are non-reducing. Explain your answer.arrow_forwardThe standard free energy change (ΔG°') for hydrolysis of fructose-l,6-bisphosphate (FBP) to fructose-6-phosphate (F-6-P) and Pi is -16.7 kJ/mol: FBP + H2O → Fructose-6-P + Pi The standard free energy change (ΔG°') for ATP hydrolysis is -30.5 kJ/mol: ATP + H2O → ADP + Pi a What is the standard free energy change for the phosphofructokinase reaction: ATP + Fructose-6-phosphate → ADP + FBP ΔG°' = -13.8 kJ/mol b What is the equilibrium constant for this reaction at 25.0 °C? K'eq =arrow_forward
- When d-glucose is reduced with sodium borohydride, optically active glucitol results.When optically active d-galactose is reduced, however, the product is optically inactive.Explain this loss of optical activityarrow_forwardIdentify the sugar in description. A ketose that, when reduced with NaBH4, forms d-altritol and d-allitol.arrow_forwardA ketose can be converted to an aldose through an enediol intermediate. What is the structure of the enediol intermediate when D-fructose is converted to D-glucose?arrow_forward
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