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Protein present in the matrix of cartilage is known as

1. chondrin
2. casein
3. cartilagin
4. ossein

Correct answer: chondrin

Solution

Chondrin is the proteinaceous substance associated with the matrix of cartilage. The other options refer to different materials: casein is a milk protein, ossein is the organic matrix of bone, and cartilagin is not the standard term here.

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