Answer:
The chemical nature of silk is primarily composed of fibroin, a protein that consists of long chains of amino acids, primarily glycine and alanine, which are linked together by peptide bonds.
Step-by-step explanation:
Silk is the soft, lustrous fiber obtained as a filament from the cocoon of the silkworm. Silk is made up of two proteins which is a fibrous one known as fibroin and the other, known to be sticky, is known as sericin.
Silk also contains other proteins, such as sericin, which is a sticky substance that covers the fibroin fibers and helps to protect them during the production of silk fabric. The chemical composition of silk gives it its unique properties, including strength, elasticity, and luster.