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Which of the following cannot methylate mercury?

(a) E. coli

(b) Bacillus

(c) Clostridium

(d) Oxygen

I got this question during an online exam.

My question is taken from Metal in portion Microbial Transformation of Heavy Metals of Environmental Biotechnology

1 Answer

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Best answer
The correct option is (d) Oxygen

Explanation: Bacteria like E. coli, Bacillus, Clostridium and Pseudomonas can methylate mercury in an area which is more enriched with sulphate. The habitats which have less sulphates or reduced form of sulphates, the methylation of mercury is not possible. However, oxygen doesn’t combine with mercury under normal temperature and hence, it cannot take part in the methylation of the mercury.

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