MCAT Question of the Day
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    Q:

    		 A bacterium is being studied by a scientist who discovers that oxygen is lethal to the bacterium. Which of the following best explains the reason for this?
    		 

    A

    		 The ATP produced by the organism's metabolism from exposure to oxygen floods the cell to overdose.

    B

    		 The oxygen is consumed by oxygen-detecting metabolic reactions which induce bacterial suicide.

    C

    		 The bacterium lacks enzymes for catalyzing reactive oxygen species into more benign compounds.

    D

    		 The normal energy-producing reactions of the bacterium are outcompeted by the presence of oxygen and the cell is no longer able to produce energy.



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