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Silk from Animals

Silkworms sec...

Question

Question 10

Silkworms secrete fibre made of
(a) fat
(b) cellulose
(c) protein
(d) nylon

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Solution

Silk fibre consists of sericin and fibroin mainly, both of which are protiesns. Fat and cellulose are not present in silk fibre. Nylon is a synthetic fibre.

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Q. Silkworms secrete fibre made of

Q. Fill in the blanks:
1. Silk threads are made from a sticky secretion secreted by the ............................... of the silkworms.
2. The finest wool is obtained from ............................... silk moth.
3. The most common silk moth is ............................... silk moth.
4. The cocoons are put in ............................... to loosen the silk fibre.
5. ............................... and ............................... are animal fibres.

The caterpillar secretes fibre which hardens on exposure to air and becomes silk fibre. The fibre secrets by caterpillar are made from:

The man-made fibre made from the cellulose polymer is :

(a) nylon (b) acrylic (c) rayon (d) polyester

Q. ________ is the natural fibre obtained from the cocoons of silkworms.

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