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During anaerobic digestion of organic waste such as in producing biogas which

During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left un-degraded?

Options

(a) Cellulose
(b) Lipids
(c) Lignin
(d) Hemi-cellulose

Correct Answer:

Lignin

Explanation:

Lignin is a complex polymer of phenylpropane units, which are cross-linked to each other with a variety of different chemical bonds.

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