Select the best description of collagen from the lis:. 1. a protein that connects the extra cellular matrix to the cytoskeleton of a cell 2. an additional cell wall between the plasma membrane and primary cell wall 3. an abundant fibrous glycoprotein found in the extracellular matrix of tissues 4. a channel within plant cell walls that bridges the cytoplasm of adjacent cells

Option-3

Explanation:

Collagen is one of the most abundant proteins of the animal kingdom as it is present in the connective tissue.

The collagen protein undergoes glycosylation that is carbohydrate molecules are attached to the protein.

The collagen fiber is produced by the chondroblasts which are suspended in the extracellular matrix of the cell. These fibers provide strength and flexibility to connective tissue.

Thus, Option-3 is the correct answer.