Silk fibre chemically is – (1) Carbohydrate (2) Fat (3) Protein (4) Cellulose

Silk fibre chemically is – (1) Carbohydrate (2) Fat (3) Protein (4) Cellulose
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(3) Protein Explanation: Silk is a natural protein fibre, some forms of which can be woven into textiles. The protein fibre of silk is composed mainly of fibroin and produced by certain insect larvae to form cocoons. The best-known type of silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyxmorireared in captivity (sericulture). The shimmering appearance of silk is due to the triangular prismlike structure of the silk fibre, which allows silk cloth to refract incoming light at different angles, thus producing different colours.
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