Metabolic pathways frequently contain reactions with positive standard free-energy values, yet the reactions still take place. How is this possible?
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Q: The hydrolysis of ATP to yield AMP and PPi yields_____________ kJ/mol
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Q: The cleavage of ATP’s phosphoanhydride bond to form ADP yields approximately _____________ kJ/mol.
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Q: Why do some reactions in metabolic pathways occur, even though the change in standard free energy is…
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Q: The significance of the ATP molecule shown is best explained by which statement below? *
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Q: Why the endergonic reactions are thermodynamically unfavorable?
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- Why do some reactions in metabolic pathways occur, even though the change in standard free energy is positive?Is there a difference between the initial and the final energy levels in catalyzed and non-catalyzed reactions?The hydrolysis of the phosphoester bond of ATP releases a large amount of free energy. True or false?
- What Underlying Principle Relates ATP Couplingto the Thermodynamics of Metabolism?What is meant by the term activation energy?Substrates and reactive groups in an enzyme’s active site must be precisely aligned in order for a productive reaction to occur. Why, then, is some conformational flexibility also a requirement for catalysis?
- Do all enzymes display kinetics that obey the Michaelis– Menten equation? Which ones do not?Linking a molecule of acetate to CoA is an example of what type of common biochemical reaction? ATP is required to catalyze this reaction, explain why in terms of the enthalpy and entropy change associated with the reaction.A reaction in an anabolic pathway is found to have a large negative Gibbs Free energy. How likely is it that this reaction is a regulatory step in the pathway? Explain your answer.
- The hydrolysis of ATP to yield AMP and PPi yields_____________ kJ/molWhy the endergonic reactions are thermodynamically unfavorable?Although endergonic reactions are thermodynamically unfavorable, yet many such reactions occur in the human body. Suppose the human body is an isolated system. Then how those reactions can be carried out in the human body?The cleavage of ATP’s phosphoanhydride bond to form ADP yields approximately _____________ kJ/mol.