Question

structure of a protien fibre .. (you can draw or explain any protien fibre ) but only one ​

Answer 1

Explanation:

Protein fibers are the most readily dyed fibers due to the numerous reactive functional groups present. They can be dyed with a wide range of dyes under acid, neutral, or slightly basic conditions.

Under acid conditions, amino groups in the protein fibers are protonated to form NH or protonated amino groups. In this form, they are able to attract dyes containing acid anions including acid and mordant dyes. Special premetallized acid dyes of sufficient solubility are used to dye protein fibers to fast colors. Protein fibers complex very readily with multivalent metal cations. Acid dyes and mordant dyes may be rendered very fast by mordanting with metal salts; chromium salts are especially effective as mordants. At neutral or slightly acid pH, protein fibers may be dyed with cationic or basic dyes; however, the fastness of the dyed fiber is poor without mordanting with tannic acid or other mordants for cationic dyes