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Coupled Reactions

AP Chemistry· difficulty 4/5

ATP hydrolysis (ΔG° ≈ −31 kJ/mol) drives many non-spontaneous reactions in cells via

  • A

    Heat transfer only

  • B

    Coupling — sum of ΔG's becomes negative

    check_circle
  • C

    Photolysis

  • D

    Catalysis without thermodynamics

Explanation

Energetic coupling: a strongly negative ΔG reaction shares its drop with a non-spontaneous one.

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