Question

Protein present in cartilage is
a. Cartilagine
b. Chondrin
c. Ossein
d. Oesin

Answer 1

Hint: Cartilage is a type of connective tissue, which connects the regions of body parts. It is found in various regions of the body, like between the joints of bone, for example; knee, ankles, elbow and ends of ribs.

Complete answer:
Cartilages are flexible and tough connective tissue, and a protein present in cartilage is chondrin. Cartilage is composed of a specialized type of cell called Chondrocytes, that produces a large amount of extracellular matrix, rich in proteoglycan and elastin fibers. Chondrin protein made up of chondroitin – 4 – Sulphate components which are present in cartilage.

Chondrin is protein found in cartilage, but this is also known as cartilagin because this is found inside the cartilage. If both names are given in options then chondrin always will be the correct option.

Ossein protein is found inside the bones. Bones are made up of osteoblast cells, osteocytes and osteoclasts. Oesin is not a kind of protein found in any type of cell, instead of oesin, eosin chemical dye is found, and this dye is utilized in staining of erythrocyte.

Hence, the correct answer is option (B).

Note: Cartilage tissue is classified into three categories, elastic cartilage, hyaline cartilage, and fibrocartilage. They are different in relative amounts of cartilage tissue. Elastic cartilage is also known as yellow fibrocartilage which provides strength and elasticity of areas where cartilage is present like ears. Hyaline cartilages also referred to as grass like cartilage, are found on many joint surfaces, like ribs and larynx. Fibrocartilage is the tough one cartilage, they are found in strong areas, like ligaments.