What do silk fibres consist of?

Vitamins

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Carbohydrates

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Proteins

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Fats

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Solution

The correct option is B Proteins
The silkworm are reared for the production of silk. The worm produces two types of proteins in the cocoon fibres, sericin and fibroin. The fibroin is the main filamentous protein which is used for the formation of silk and the sericin is involved in binding the fibres of fibroin.
Thus, the correct answer is option C.

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