Question:

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

Updated On: May 19, 2024

Lipids
Lignin
Hemi-cellulose
Cellulose

Hide Solution

Verified By Collegedunia

The Correct Option is B

Solution and Explanation

Lignin is a complex polymer of phenylpropane units, which are cross-linked to each other with a variety of different chemical bonds. This complexity has thus far proven as resistant to microbial degradation. Cellulose is a long chain of glucose molecules, linked to one another primarily with glycosidic bonds. The simplicity of the cellulosic structure, using repeated identical bonds, means that only a small number of enzymes are required to degrade this material. Hemicelluloses are branched polymers of xylose, arabinose, galactose, mannose, and glucose. Hemicelluloses bind bundles of cellulose fibrils to form microfibrils, which enhance the stability of the cell wall but these can be degraded by increasing the number of enzymes.

Was this answer helpful?

Questions Asked in NEET exam

View More Questions

Concepts Used:

Microbes in Human Welfare

There are several valuable microorganisms that are beneficial to humans in various manners such as:

In Household Products

Fermentation of milk to produce yogurt.
Milk cuddling to compose curd, cheese, and paneer.

In Industrial Products

Production of beverages such as wine, beer, whiskey, brandy, or rum.
Production of antibiotics such as Penicillin and other chemical substances to kill or retard the expansion of disease-causing microbes.

Fermented Beverages

A fermentor is used to produce microbes on a large scale for industrial purposes.
The brewer’s yeast (Saccharomyces cerevisiae) is used to make ethanol. At this time, the yeast ferments malted cereals and fruit juices.

Antibiotics

The term antibiotic means “against life”. These materials can kill or destroy the growth of other microbes.