During bio-gas formation, digestion of cellulose is slow (ratc-limiting) and most of the lignin Is not decomposed. Lignin is a complex polymeric molecule, made up of phenyl propanoid units. This complexity has thus far proven as resistant to microbial degradation. After cellulose lignin is the most abundant plant polymer. It forms 20 to 30% of the wood of the tree. Cellulose is a large chained polymer of glucose molecules which are linked with each other by glycosidic bonds. Hemicellulose are branched polymers of glucose, xylose, galactose, mannose and arabinose.
During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded ?
NEET UG 2003 — Botany Respiration in Plants
2003mcqmedium
During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded ?
Official previous-year question
Held on 30 Apr 2003 · Verified 9 Jul 2026.
Options
- A
lipids
- B
lignin
- C
hemi-cellulose
- D
cellulose
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