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WAEC Biology 2010 Question 9

Question 9

Respiration

In cellular respiration energy is made available to organisms by

  1. A.removal of a phosphate group from ADP.
  2. B.breaking off a phosphate group from ATP.
  3. C.adding a phosphate group to glucose.
  4. D.breaking off a hydrogen ion from NADPH.
Show the answer and explanation

Answer: B (breaking off a phosphate group from ATP.)

Explanation

Energy stored in ATP is released when its end phosphate group is split off, forming ADP.