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Name the type of bacteria which uses reduced inorganic substances as an electron source?

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Name the type of bacteria which uses reduced inorganic substances as an electron source?

(a) Autotrophs

(b) Chemotrophs

(c) Organotrophs

(d) Lithotrophs

I had been asked this question during an online exam.

My query is from Bacterial Nutrition topic in portion Prokaryotes and Viruses of Life Sciences

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Right choice is (d) Lithotrophs

The explanation: Bacteria which uses reduced inorganic substances as their electron sources are called lithotrophs while organotrophs are the bacterial class which utilizes organic compounds as their electron source.

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