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
Explain the Mode of Feeding or Nutrition Support? Do you recall studying about the nutrition support methods, namely enteral and perenteral feeding? These two methods form the

Question 1: Write the applications of Oracle clinical in Pharmaceutical industries Explain what is "Oracle clinical" Explain different application of oracle clinical

What is the destination of the branchial clefts in humans? In humans the branchial clefts situated in the anterior region of the pharynx (also called as pharyngeal clefts) are

If a tissue was heated to 65ºC for 10 minutes, respiration would cease even if oxygen and food were supplied. Why is this? A temperature of 65°C for 10 minutes would denature

What is Chromosomes ? The terminology used to describe DNA replication may sometimes be confusing. Originally, the term "chromosome" referred to the structures seen through the

I have 9 questions in my undergraduate cardiovascular physiology class I need help with. It is mostly dealing with slow response action. I need the work in about 2nite hours from n

Define Requirements of Carbohydrates during Surgery? Carbohydrates: Carbohydrates are needed to build up glycogen stores and spare the proteins for tissue synthesis, Around GO%

Define Deficiency and Toxicity of Vitamin D? Infants constitute a population at-risk for vitamin D deficiency because of relatively large vitamin D needs brought about by their

Explain Antiarrhythmic Drugs? Amiodarone may be considered in VT/VF that is refractory to shock. It might be given if the third shock is not successful. The dose is 300 mg IV i

In the axon of a nerve cell, A. the voltage-dependent conductance of the voltage-gated potassium channel has a faster time course than the voltage-dependent conductance of the