When a cell is metabolizing in the absence of oxygen and it is then exposed to anenvironment containing oxygen, a series of oxidation"reduction reactions isinitiated, which enables the cell to increase its activities.
(a) Outline the oxidation"reduction reactions that are initiated under theseconditions and indicate the point at which molecular oxygen interacts withthe oxidative system.
(b) Explain how the cell derives additional energy by switching from non"oxidative to oxidative metabolism.