describe the main differences between cellulose and collagen?

Question

i need this for homework...any help please thanx:)

Answer 1

1. Cellulose is a polysaccharide while collagen is a protein.

2. cellulose is a polymer of beta glucose residues lined by
beta (1 ---->4) glycosidic bonds whereas collagen is a
polymer alpha amino acids linked by peptide bonds.

3. Cellulose is a linear unbranched molecule, each
consisting of a single chain whereasa collagen subunit,
tropocollagen, consists of three polypeptide chains.

4. A single type of monomer unit is used to make cellulose
but varied monomer units are used for collagen. e.g.
glycine, proline,hydroxyproline and hydroxylysine


5. Cellulose is a structural polysaccharide in the cellwalls
of plants while collagen is a structural protein in animals;
connective tissue, bone,teeth, tendons, ligaments etc.

6. cellulose is the major component of paper, used to
make rayon,cellophane etc while collagen has been
used in medicine in cosmetic surgery, sold as a joint
mobility supplement.

Do some supplementary reading on the topic

Answer 2

cellulose is a corbohydrate present in plant cell whre as collagen is a protein present in humans in the form of connective tissue

Answer 3

-Cellulose is a common material in plant cell walls. Cellulose monomers (β-glucose) are linked together through β(1→4)-glycosidic bonds by condensation. This is in contrast to the α(1→4)-glycosidic bonds present in other carbohydrates like starch. Cellulose is a straight chain polymer: unlike starch, no coiling occurs, and the molecule adopts an extended rod-like conformation. In microfibrils, the multiple hydroxyl groups on the glucose residues hydrogen bond with each other, holding the chains firmly together and contributing to their high tensile strength. This strength is important in cell walls, where they are meshed into a carbohydrate matrix, helping keep plant cells rigid.
The ability to breakdown cellulose is not possessed by mammals. Typically, this ability is possessed only by certain bacteria (which have specific enzymes) like Cellulomonas etc, and which are often the flora on the gut walls of ruminants like cows and sheep, or by fungi, which in nature are responsible for cycling of nutrients. The enzymes utilized to cleave the glycosidic linkage in cellulose are glycoside hydrolases including endo-acting cellulases and exo-acting glucosidases. Such enzymes are usually secreted as part of multienzyme complexes that may include dockerins and cellulose binding modules.


-While collagen is the major fibrous protein(consisted of amino acid) in animals, present in all types of multicellular animals and probably the most abundant animal protein in nature. It is estimated that collagen accounts for about 30% of the total human body protein. occurring widely in tendons, ligaments, dentin (see tooth), cartilage, and other connective tissues. Their molecules share a triple-helix configuration. Collagens occur as whitish, inelastic fibres of great tensile strength and low solubility in water. Soluble when first synthesized (the form used in personal-care preparations), collagen changes to a more stable, insoluble form. Glue made from collagen in animal hides and skins is a widely used adhesive. Specially treated forms of collagen are used in medicine and surgery (including lip implants and other cosmetic surgery), in prostheses, and as sausage casings. Collagen is converted to gelatin by boiling it in water.

The tropocollagen or "collagen molecule" subunit is a rod about 300 nm long and 1.5 nm in diameter, made up of three polypeptide strands, each of which is a left-handed helix, not to be confused with the commonly occurring alpha helix, which is right-handed. These three left-handed helices are twisted together into a right-handed coiled coil, a triple helix, a cooperative quaternary structure stabilized by numerous hydrogen bonds. Tropocollagen subunits spontaneously self-assemble, with regularly staggered ends, into even larger arrays in the extracellular spaces of tissues. There is some covalent crosslinking within the triple helices, and a variable amount of covalent crosslinking between tropocollagen helices, to form the different types of collagen found in different mature tissues — similar to the situation found with the α-keratins in hair. Collagen's insolubility was a barrier to study until it was found that tropocollagen from young animals can be extracted because it is not yet fully crosslinked.

Collagen fibrils are collagen molecules packed into an organized overlapping bundle. Collagen fibers are bundles of fibrils.

Answer 4

Cellulose is composed of glucose (sugar) molecules and collagen is composed of amino acids.

Answer 5

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