CURRENT AFFAIRS

2019

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Lignocellulosic biomass, sometimes seen in news, is composed of ______?
A
Cellulose
B
Hemicellulose
C
Lignin
D
All of the above
Explanation: 

Detailed explanation-1: -Lignocellulosic biomass (LB) is an abundant and renewable resource from plants mainly composed of polysaccharides (cellulose and hemicelluloses) and an aromatic polymer (lignin).

Detailed explanation-2: -Lignocellulose is formed directly from plant photosynthesis, and mainly contains cellulose, hemicellulose, and lignin. These three components form the main composition of the plant cell wall.

Detailed explanation-3: -Lignin, making up to 10–25% of lignocellulosic biomass, is the second most abundant natural polymer [3], [4], [5]. Lignin is insoluble in water and stable in nature and acts as the “glue” that connects cellulose and hemi-cellulose.

Detailed explanation-4: -Lignocellulosic wastes are considered to be second-generation feedstock. Examples include bagasse wastes, rice wastes, corn wastes, spent grains and miscellaneous wastes. Bagasse waste is a by-product of the sugar industry; it is a dry pulpy fibrous material left after crushing sorghum or sugarcane stalks.

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