MDCAT Biology MCQ #747

When a cell requires energy for active transport, it hydrolyzes the terminal phosphate bond of ATP. How much energy is typically released per mole?

MDCAT Biology MCQ #747

  1. Question 1

    Q1. When a cell requires energy for active transport, it hydrolyzes the terminal phosphate bond of ATP. How much energy is typically released per mole?

    • A) Absorbs 7.3 kcal of energy
    • B) Releases 10.5 kcal of energy
    • C) Releases 7.3 kcal of energy
    • D) Produces a pyrophosphate molecule

    Answer: Releases 7.3 kcal of energy

    Explanation: ATP hydrolysis releases 7.3 kcal/mol (or 31.8 kJ/mol) of energy. Endergonic reactions consume energy rather than releasing it like ATP hydrolysis.