A) fibroin
B) serecin
C) chitin
D) mucin
Correct Answer: B
Solution :
Silk thread is obtained from the cocoon of Bombyx mori. It mainly contains a water soluble protein, Serucin. Fibrin is a protein that forms a meshwork, trapping erythrocytes, to become blood clot. Its precursor is fibrinogen. Chitin is a horny substance or nitrogenous polysaccharide, insoluble in water, alcohol, dilute acids and digestive juices of most animals. It forms part of the cuticle or arthropods and is found sparingly in certain other invertebrates. Mucin is a group of glycoproteins secreted by certain cells especially those of salivary glands.You need to login to perform this action.
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