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Energy coupling Knowledge-Based Practice

Biology · Cellular Energetics · Biology · Energy & Metabolism

1 Biology practice questions on Energy coupling. Questions that assess core concepts and understanding.

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Questions

  1. 1.

    Which of the following best describes how cells use energy coupling to drive an endergonic reaction forward?

    • A) An exergonic reaction, such as ATP hydrolysis, is paired with an endergonic reaction so that the combined process has a net negative change in free energy.
    • B) Thermal energy released from catabolic reactions is harnessed directly by enzymes to supply the necessary energy to synthesize endergonic products.
    • C) An enzyme alters the standard Gibbs free energy change of the endergonic reaction by permanently altering the chemical structure of its active site.
    • D) Cytosolic temperature is localized and elevated around the substrate molecules to make an otherwise non-spontaneous synthesis favorable.

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