Biology CLEP Prep Practice Exam

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How is energy derived from ATP?

  1. By transferring a phosphate group from ATP to another molecule

  2. By breaking the bond between the energy-carrying nucleotides

  3. Through direct transfer of electrons

  4. By combining two ATP molecules

The correct answer is: By breaking the bond between the energy-carrying nucleotides

Energy is derived from ATP by breaking the bond between the energy-carrying nucleotides. This process releases the stored energy needed for various cellular processes. Option A is incorrect because transferring a phosphate group from ATP to another molecule does not release energy, but rather requires energy input. Option C is incorrect because while ATP is involved in electron transfer reactions, it does not directly transfer the electrons itself. Option D is incorrect because combining two ATP molecules to form a diphosphate molecule does not release energy, but rather requires energy input.

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