Home Biology Microbes in Human Welfare Statement Based Questions Given below are three statements (A-B) each …
Biology Microbes in Human Welfare Statement Based Questions Single Correct MCQ
Published on: August 13, 2026

Given below are three statements (A-B) each with one or more blanks. Select the option which correctly fills the blanks in the statements -

Statements:

A Microbes consume the major part of the organic matter in the effluent and reduce _______ of sewage.

B. Certain bacteria which grow anaerobically on cellulosic material, produce large amount of methane along with

C0 2 and H 2 . The bacteria are commonly called as _______ and one such common bacterium is _______.

Options:

A
A - CO 2 demand; B - methanogens, Methanobacterium
B
A- Carbon; B -methanogens, Methanobacterium
C
A - biochemical oxygen demand; B - methanogens, Methanobacterium
D
A - biochemical oxygen demand; B - Methylokorus infernorum

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