ATP is a source of free energy that drives unfavorable reactions. Which of the processes are coupled to the dephosphorylation of ATP? the exergonic hydrolysis of creatine phosphate myosin action during muscle contraction de novo (from scratch) anabolism of nucleotides reversible isomerization of glucose-6-phosphate to fructose-6-phosphate during glucose catabolism membrane transport that maintains Na+ levels in cells

ATP is a source of free energy that drives unfavorable reactions. Which of the processes are coupled to the dephosphorylation of ATP? the exergonic hydrolysis of creatine phosphate myosin action during muscle contraction de novo (from scratch) anabolism of nucleotides reversible isomerization of glucose-6-phosphate to fructose-6-phosphate during glucose catabolism membrane transport that maintains Na+ levels in cells

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter2: Cell Physiology

Section: Chapter Questions

Problem 3SQE

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Similar questions

Which of the following processes would be directly affected by the presence of a non-hydrolyzable form of ATP ? the depolymerization of tubulin monomers O the depolymerization of actin monomers the polymerization of tubulin monomers the polymerization of actin monomers
Glucose is phosphorylated to glucose-6-phosphate by hexokinase in the first step of the glycolytic pathway to trap it in the cell, as G6P cannot diffuse across the lipid bilayer. This reaction also decreases the concentration of free glucose, favoring additional import of the molecule. However, this has a postive standard free energy of 3 kcal per mole. To favor this reaction, hydrolysis of ATP is coupled, which has a standard free energy of -7 kcal per mole. Determine the actual free energy change in kcal/mole for the following conditions: Glucose concentration: 4.5 mM ATP conc: 3.79 mM G6P conc. 0.052 mM ADP conc: 0.12 mM inorganic phosphate conc: 1.3 mM temperature: 313 K Ans. in 3 SFs.
ATP is a source of free energy that drives unfavorable reactions. Which of the processes are coupled to the dephosphorylation of ATP? ion transport with the concentration gradient reversible isomerization of glucose-6-phosphate to fructose-6-phosphate during glucose catabolism the endergonic reaction forming glucose-6-phosphate myosin action during muscle contraction de novo (from scratch) anabolism of nucleotides One reason that ATP is a source of energy is that the products of ATP hydrolysis have less free energy than the reactants. Why? formation of ion pairs involving ATP hydrogen bonding between free phosphate and water resonance stabilization of free phosphate electrostatic repulsion in ATP
Lactic acid builds up in the athlete's thigh muscle after marathon training. Compare and contrast the physiological functions and Vmax of glycogen phosphorylase in active skeletal muscle and liver. The athlete faints after a rigorous workout owing to a low blood glucose level. A liver biopsy reveals that there is an excess of glycogen in the liver. Suggestions on whatever sort of enzyme is faulty in this circumstance should be accompanied by an explanation.
Which steps are part of the energy investing half of glycolysis? OPhosphorylation Isomerization Second Phosphorylation Cleavage Conversion of DHAP into GADP O Dephosphorylation Phosphate transfer O Dehydration Second dehydration
Loss of this enzyme would be lethal to the cell CH₂-CH-CH₂ OH OH Glycerol- phosphate Loss of this enzyme would severely reduce the exchange of lipids between the cytosol and lumen P CH₂-CH-CH₂ O O I =C C=O Loss of this enzyme would lead to membrane phospholipids with identical phosphate head groups Phosphatase Acyl transferase Loss of this enzyme would result in membranes deficient in phosphatidylcholine Choline head Cytosol group ER lumen Choline phosphotransferase Loss of these enzymes would prevent lipid transfer between the ER and mitochondria Flippase lipid exchange proteins
Which enzyme activity of the glycogen debranching enzyme is operating during the release of glucose units linked to glycogen branchpoints via a1,6 glycosidic linkage? O phosphorylase activity O phosphatase activity O transferase activity O glucosidase activity
Which of the selected phosphate group hydrolysis reactions listed in the table below can NOT be productively coupled to the synthesis of glucose-1-phosphate? Free energy of hydrolysis for certain phosphate bonds Compound kcal/ mol-1 Phosphoenolpyruvate -14.8 1,3-Bisphosphoglycerate -11.8 Creatine phosphate -10.3 ATP (to ADP) -7.3 Glucose 1-phosphate -5 Pyrophosphate -4.6 Glucose 6-phosphate -3.3 Glycerol 3-phosphate -2.2 ATP hydrolysis. Glucose-6-phosphate hydrolysis.
The proton channel of ATP synthase consists of: 8–14 pairs of α helices. 8–14 a subunits. 7 α helices. 8–14 α helices. 8–14 half-channels.
Why is glucose phosphorylated to become glucose-6-phosphate? Group of answer choices to isomerize it to glucose 1 phosphate to activate the enzyme hexokinase to trap glucose inside the cell and commit it to the pathway to form bisphosphate molecules
Explain from a chemical stand point why ATP has a high phosphoryl-transfer potential. Make sure to compare ATP with its hydrolysis products, ADP and inorganic phosphate.
True or false - metabolism of triglycerides generate water - sphingolipids are formed from glycerol and fatty acids - unsaturated fatty acids tend to have links in their structure due to double bonds - lateral diffusion of lipids on a bilayer is very slow compared to transverse diffusion - long chain fatty acids would make good components for the waxy coating of plants because their melting temperatures are relatively high