Cellulose, Biology

CELLULOSE

  • It is a linear polymer of b -D-glucose.
  • It is the structural polysaccharide of plant cell walls, walls of some primitive fungi, some protists, and tunic of ascidians (tunicin or animal cellulose).
  • Cellulose is fibrous glucosan homopolysaccharide of high tensile strength.
  • It is also the most abundant organic molecules of earth.
  • Cellulose molecules are long chain polymers of 6,000 - 10,000 b -glucose units.
  • They are unbranched, straight and linear. The adjacent b -glucose units are joined by b(1 → 4) linkages.
  • A cotton fibre is formed of some 1500 firbils with each fibril having about 250 microfibrils.
  • Cellulose microfibrils do not interfere with the permeability of the cell wall.
  • Cellulose does not react with iodine solution. It is not soluble in common solvents.
  • Human beings are unable to digest the same due to absence of cellulose digesting enzyme cellulase ( b - glucosidase).The enzyme is produced by very few organisams. e.g.-

                  Flagellate Trichonympha present in bodies of termites,

                  Wood rotting fungi,

                  Bacterium Rumenococcus

                      Entodinium caudatum (Ciliate) present in the rumen of ruminant animals. e.g. (Cow, Buffalo, Goat, Sheep, Deer,                             Giraffe).

  • Cellulose is an important component of diet of ruminants and other herbivores. They posses symbiotic microorganisms for performing this digestion.
  • Cellulose gives the bulk to human food.
  • Good quality timber contains both cellulose and lignin. It is used in preparing furniture, boats, body of trucks, tools, music instruments and sports goods.
  • Cellulose, the most abundant organic molecule, is the structural component of plant cell walls.
  • Cellulose is used as food by herbivorous animals.
  • They are helped in this activity by symbiotic microorganisms present in their alimentary canal.
  • In ruminants the cellulose digesting microorganisms reside in the chambers of stomach.
  • In human diet, cellulose has only roughage value.
  • Microbes are used in fermentation of cellulose containing materials.
  • In cotton fibres 90% cellulose is present.
Posted Date: 10/9/2012 3:50:31 AM | Location : United States







Related Discussions:- Cellulose, Assignment Help, Ask Question on Cellulose, Get Answer, Expert's Help, Cellulose Discussions

Write discussion on Cellulose
Your posts are moderated
Related Questions
F o o t - a n d - m o u t h disease Foot-and-mouth disease (FMD) is an extremely contagious viral disease of cloven footed animals most notably cattle, pig and she

Q. What is the basic importance of water for enzymatic activity? Ans. Biological catalysts, Enzymes, relay on water to reach their substrates and attach to them. There is

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Carbon is important constituents of all organic compounds. It forms 49% of dry weight of the organisms.  Earth atmosphere contains 0.03% carbon dioxide gas.               The c

Given a polymer backbone of H-C-C with the first carbon having 2 H atoms attached and the 2nd carbon with 3 atoms attached, a bond with a water molecule attaches to the left H atom

Phylum Mollusca (47,000 species) The segmentation and coelom may not exist. Diversification through modifications of head, foot; mantle and 'radula for feeding. .Visceralorgans


What are the hormones produced by the testicles and the ovaries? The testicles make androgenic hormones, the major of them being testosterone. The ovaries make estrogen and pro

Define Larval Stage of Taenia Cystcercus? The pork tapeworn (T: solium) and beef tapeworn (T : saginata , which are endoparasites of humans who are the final hosts

Summary of Accident Causation In the light of above theories it is concluded that the decision of workers to work safe is largely influenced by external factors such as meetin