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Practice MCAT Question - Q62 - Answer!

The products formed during the electron transport chain include

A.  ATP and water.
B.  ATP and carbon dioxide.
C.  ATP, water, and oxygen.
D.  ATP, carbon dioxide, and water.

The correct answer is (A). Only ATP (32 molecules) and water (6 molecules) result from the electron transport chain. Carbon dioxide production is associated with the Krebs cycle (see above), and oxygen is only consumed during cell respiration. (Oxygen is produced during photosynthesis!)

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