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In absence of inorganic electron acceptor, the oxidized metabolite is reduced to ___________

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In absence of inorganic electron acceptor, the oxidized metabolite is reduced to ___________

(a) Lactate

(b) Oxygen

(c) Sodium

(d) Water

I have been asked this question in an internship interview.

Question is taken from Anaerobic Bacterial Degradation of Biopolymers in chapter Biodegradation of Organic Pollutants of Environmental Biotechnology

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Correct choice is (a) Lactate

Easiest explanation: In absence of inorganic electron acceptor, the oxidized metabolite such as pyruvate or acetate is reduced to lactate or bio transformed, whereas, Oxygen and sodium, water are not the byproducts of the oxidized metabolite.

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