Consider the reaction:Galactose 1-phosphate + UDP-glucose → UDP-galactose + glucose 1-phosphateWhich pairing correctly matches the enzyme class and Enzyme Commission number for theenzyme that catalyzes this reaction?translocase; 2translocase; 7transferase; 2transferase; 7isomerase; 5

Glycolysis is the metabolic pathway through which one 6 carbon glucose is converted into two 3…

Answered: Galactose 1-phosphate + UDP-glucose →…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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a. In the reaction: glycogen to glu-1-phosphate, what reaction is involved? Name the enzyme. b. In the reaction: glu-1-phosphate to glu-6-phosphate, what reaction is involved? Name the enzyme. Identify the two pathways where this enzyme is used.
Specify 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 phosphate
Which of the following describes a purpose for the function of phosphoglucoisomerase? a) allows for phosphorylation for trapping the molecule in the cell b)promotes substrate level phosphorylation and formation of ATP c) allows formation of a primary alcohol necessary for the next step of phosphorylation d)facilitates epimerization, the change in stereochemistry at one chiral carbon
Suggest a name for an enzymes that catalyzes each of the following reactions.1. Hydrolysis of Lactose 2. Oxidation of Nitrate3. Decarboxylation of Citrate4. Reduction of Exalate
Identify different types of organic reaction mechanims in the followingmetabolic pathways.1. Catabolism of triacylglycerols- beta-oxidation pathway2. Biosynthesis of fatty acids from Acetyl CoA3. Glycolysis (from glucose to two molecules of pyruvate)
Which of the following is NOT involved in the activation of glucose for glycogen synthesis? A. Phosphorylation of glucose by hexokinase to glucose-6-phosphate. B. Isomerization of glucose-6-phosphate to fructose-6-phosphate by phosphohexose isomerase. C. Two-step phosphoryl group transfer by phosphoglucomutase. D. Attachment of glucose-1-phosphate to UDP.
In the degradation of glycogen, the purpose of the debranching enzyme is to remove the last four glucose molecules from branches structure of glycogen. It does this by catalyzing three different reactions. Use the equations below to answer parts a-c. Synthesis of α(1,6) link ΔG = +7.1 kJ Hydrolysis of α(1,4) link ΔG = ─15.5 kJ a)What are the three chemical reactions performed during the removal of the last four glucose molecules of the branching structure of glycogen? b) Calculate ΔG for each of the three reactions described in part a. c) Now calculate the overall energy change for the net reaction carried out by this enzyme. d) Why is this reaction favorable?
A(n) _________ reaction converts glycylalanine to glycine and alanine. This reaction requires __________. Blank 1 options- Oxidation-reduction Hydrolysis Isomerization Group transfer Internal rearrangement Blank 2 options- H2O and apeptidase or a protease H2O and a phosphatase ADP and a phosphatase NAD+ and a peptidase or a protease
Consider 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*
write chemical equation showing the breakdown of lactose. above the arrow indicate the enzyme that catalyzes reaction?
When studying the mechanism of the enzymatic reaction, functional groups were found that ensure the connection of the enzyme molecule with the substrate and take a direct part in the act of catalysis. What are these areas of the enzyme formed by these groups called? What functional structures form them and why?
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-phosphate

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Galactose 1-phosphate + UDP-glucose → UDP-galactose + glucose 1-phosphate Which pairing correctly matches the enzyme class and Enzyme Commission number for the enzyme that catalyzes this reaction? translocase; 2 translocase; 7 transferase; 2 transferase; 7 isomerase; 5