Question

Protein present in the cartilage is
A. Chondrin
B. Oesein
C. Cartilagin
D. Ossein

Answer 1

Hint:- Cartilage are important structural components of the body which serves to cover and allow protection to the bones and joints. It is a type of avascular, flexible connective tissue. A connective tissue is found in animals and it works to join or bind the other tissue systems such as muscles to the skin

Complete step-by-step solution:-
Cartilage is flexible, elastic and acts as a rubber-like padding and covers as well as protects the end of long bones especially at the joints and nerves. It is the structural component of many important structures such as the rib cage, ears, nose, bronchial tubes, the intervertebral disc and other similar components. The cartilages are not rigid but are less flexible than the muscles. Cartilages in the body are of three types such as hyaline cartilage, found on many joints, fibrocartilage, which is found in tendon and ligament tissues and elastic cartilage. The cartilage does not receive blood vessels and nerves. The main source of nutrition of the cartilage is through the process of diffusion.
The cartilage cells are composed of specialized cells that are known as chondrocytes. The cells or the chondrocytes are known to produce a large amount of collagenous extracellular matrix, with abundant ground tissues. Cartilage matrix consists of glycosaminoglycans, proteoglycans, collagen fibers and elastin. The matrix contains a specialized protein known as the chondrin.
Chondrin is a gelatin like substance and it is bluish white in colour. It can be isolated by boiling the cartilages. It is a complex of protein and carbohydrate. The proteins in the Chondrin are of two types which are chondrocalcinosis and chondromyxoid.
The organic extracellular matrix of the bone is known as ossein. It is mostly made up of collagen. It is isolated from animal bones and is used in the production of gelatin and bone glue. Cartilage is a type of cartilaginous proteins found in higher organisms.

Therefore, the correct option is option A.

Note:-
The cartilage is found in the areas of the joints and end bones as a protective covering. The cartilages are elastic in nature and are made up of connective tissues. The important protein present in the cartilage is chondrin. It is a gelatinous substance and forms a complex with carbohydrates.