Which of the following natural fibers are made of protein?

(i) Cotton

(ii) Wool

(iii) Jute
(iv) Silk
Select the correct option.

Correct option is C

The correct answer is: (c) Wool and Silk

Explanation:

• Wool is a protein fiber obtained from the fleece of sheep and other animals like goats (cashmere, angora). The main component of wool is keratin, a protein.

• Silk is another protein fiber, produced by silkworms. It is primarily composed of fibroin, a protein that gives silk its characteristic sheen and strength.

• Cotton and Jute are plant-based fibers and are made of cellulose, not protein.

Information Booster:

• Wool is used in making warm clothing like sweaters, coats, and carpets due to its insulating properties.

• Silk is a luxurious fabric known for its smooth texture and sheen. It is widely used in high-end fashion and textiles.

• Protein fibers like wool and silk are biodegradable and come from natural sources.

• Wool can be easily dyed, and its moisture-wicking properties make it suitable for cold climates.

• Silk is highly prized for its softness and luster, but it requires careful handling during washing due to its delicate nature.

Additional Information:

• Cotton is made from the cellulose found in the cotton plant and is the most widely used natural fiber for making fabrics like t-shirts, sheets, and denim.

• Jute is another plant-based fiber, used mainly in making burlap sacks, ropes, and mats. It is derived from the stem of the jute plant.