Which of the following derivatives is composed of hard keratin?
A
Hair
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B
Hair follicles
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C
Nails
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D
Sweat gland
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Solution
The correct option is C Nails
Hard keratin is found in hair and nails; soft keratin is found in the epidermis of the skin in the form of flattened non-nucleated scales that slough continually.
Keratinization is the process of transforming epidermal cell material into keratin. Hence, Nails is composed of hard keratin.