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How does energy coupling work?

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Wize University Biology Textbook > Energy & Metabolism

Coupled Reactions

4 Activities

How does energy coupling work?
More Coupled Reactions Questions:
C6H12O6 + 6O2 --> 6CO2 +6H2O is the balanced chemical equation for respiration. Is the process exergonic or endergonic?
Coupled Reactions
What is the gibbs free energy of reaction for a coupled reaction where one process has a standard free energy change of +43 kJ/mol and the other has a standard free energy change of -16kJ/mol?
Is this coupled reaction spontaneous or non-spontaneous?
Free Energy
How can unfavourable reactions occur in a cell?
Which of the following have a negative ΔG?
Wize Exam Practice Questions:
Which of the following enzymes catalyzes a reversible reaction?
What are the 3 steps of glycolysis that have the largest exergonic reactions? What enzymes are they regulated by?
Similar to 2018 exam Q4
Provide 2 examples of coupled reactions found in cellular respiration, then give a detailed explanation of each. Use free energy values were necessary (6pts)
Give a real-life example of an ATP coupled reaction. Write out the equations.
If the entropy of a system is large, the enthalpy is negative and the temperature of the system is high, which of the following would be correct? All other conditions are constant and controlled. Select all that apply.
Gibbs Free Energy
Which of the following is true about an exergonically coupled reaction? Select all that apply.
The net ΔG is negative
There are more than 2 reactions happening at the same time
Coupled Reactions
What is the gibbs free energy of reaction for a coupled reaction where one process has a standard free energy change of +43 kJ/mol and the other has a standard free energy change of -16kJ/mol?
Is this coupled reaction spontaneous or non-spontaneous?
What is the net free energy change of two reactions and indicate if it is favourable or unfavourabe. One with a free energy change of -26 kJ/mol and the other with +15 kJ/mol.
Practice: Polymerization
Polymerization reactions are endergonic, why?
Free Energy
How can unfavourable reactions occur in a cell?
Practice: What is Gibbs Free Energy?
What does Gibbs free energy determine?
Using Gibb's Free Energy, an example
A biochemical pathway produces metabolite E. This pathway consists of A, B, C and D intermediates that require enzymes 1, 2, 3 and 4 to catalyze each step of the reaction.
a. Given the following information about each reaction, state which reactions are exergonic or endergonic. Where possible, state which reactions are exothermic or endothermic.
i. A → B, ΔG = +3
Given the below steps to a biological reaction, what can you infer about each step? What can you predict about the reaction as a whole?
(i.e. what is ΔGTotal\Delta G_{Total} )
C6H12O6 + 6O2 --> 6CO2 +6H2O is the balanced chemical equation for respiration. Is the process exergonic or endergonic?
Given the figure, which of the following statements is correct?
Why are enzymes vital for life?
Given the following information, what is the value of the change in free energy?
T = 25oC
Entropy of the reactants = 3
Given the figure below, which of the following is true?
Which of the following statements best describes the enthalpy change of a reaction?
Which of the following enzymes catalyzes a reversible reaction?
A reaction where the products have less energy than the reactants is considered…
A reaction with a positive ΔG is considered...
Why is ATP hydrolysis exergonic?
How can energy coupling with ATP be described?
Which of the following is not a reason ATP hydrolysis is exergonic?
Which of the following describes a reaction that occurs on its own and releases energy?
Which of the following have a negative ΔG?