Question

Silk obtained from silkworm is a
(a)Fat
(b)Cellulose
(c)Protein
(d)Carbohydrate

Answer 1

Hint: These are the micronutrients that are essential for the proper growth and development of the muscles. There are many animal products like fish, milk, etc. in which these substances are found in abundance.

Complete answer:
Silk is a naturally occurring product from the silkworm. Silk is composed of amino acids. The process of silkworm rearing to produce silk fiber is known as sericulture. Using special machines the silk fibers separate from the cocoon. Silk fibers are then spun into threads of silk which weavers weave into silk cloth. Silk is a fiber of natural protein that can be used as a textile fiber. It is one of the important animal fibers from silkworms. Silk consists of two primary proteins; a fibrous protein known as fibroin, and a sticky protein known as sericin, with the two consisting of 70–80 percent and 20–30 percent respectively of silk. Both of these proteins provide the unique silk functionality that makes silk garments so unique and popular.
The fibroin is the main filamentous protein that is used for the formation of silk and the sericin is involved in binding the fibers of fibroin.
Sericin has a high content of hydroxy amino acids which are important for the water-binding capacity that regulates the moisture content of the skin.
So, the correct answer is, ‘Protein’.

Additional Information: Silk is also one of the strongest natural fibers and today, apart from the garments, has many uses. It is used in parachutes as well as in blanket filling and is now used in surgical sutures and bicycle tires as a material.

Note: The various types of silk are produced through different types of silkworms. It can be distinguished by luster and texture. Kosa, tassar, mooga, etc. are just a few examples. Silk is made by different types of silkmoths. One common type is the silkmoth mulberry.