According to the research, the correct answer is that keratin and keratinization have an impact on the resistance of the superficial layer of the skin and hair.
<h3>What is keratin?</h3>
It is a fibrous and insoluble protein, formed by parallel polypeptide chains in alpha-helical or beta-sheet conformations through the process of keratinization.
In this sense, it is the main constituent of hair and the corneal structure of nails, contributing to hardening, whose cysteine monomers give them great resistance and which provides calcium.
Therefore, we can conclude that keratin is a protein created by keratinization and found in the capillary and nail structure, directly influencing its resistance and appearance.
Learn more about keratin here: brainly.com/question/5961233
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