Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons.
Thus, option C is correct.
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Q1
Silk fibres are made up of:
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Silk fibres are made of calories.
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Silk fibres are made of a protein.
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Q4
Silk fibres are made of ____.
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How many of the given natural fibres have polymers made up of amino-acids?