Illinois Cosmetology Practice Exam

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Prepare for the Illinois Cosmetology Exam with our comprehensive quiz. Engage with interactive flashcards and multiple-choice questions designed to strengthen your knowledge and skills in the beauty industry. Ace your licensing exam with confidence!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Hair is primarily composed of:

Keratin
Melanin
Sebum
Collagen

The correct answer is: Keratin

Hair is not composed of melanin, which gives skin and eye color but does not make up hair itself. Sebum, an oily substance, is secreted by the scalp to moisturize hair but is not a primary component of hair. Collagen, a protein found in connective tissue, also contributes to healthy hair but is not the main building block. Keratin, on the other hand, is a fibrous protein that makes up the structure of hair and is responsible for its strength and elasticity. Therefore, hair is primarily composed of keratin.