Arkansas Esthetician Practice Exam

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What is a peptide?

An ingredient that increases product density
An organic acid extracted from natural sources
A silicone-based ingredient
A compound of two or more amino acids linked in a chain

The correct answer is: A compound of two or more amino acids linked in a chain

A peptide is defined as a compound made up of two or more amino acids that are linked together in a chain. This biochemical structure plays a crucial role in various physiological functions and is essential in skincare products due to its ability to promote skin health. Peptides can communicate with cells to initiate vital processes such as collagen production, which can lead to improvements in skin texture and elasticity. The other options do not accurately define peptides. The first option suggests a function related to product density, which does not pertain to the structural or chemical nature of peptides. The second option describes an organic acid, which is a different type of compound altogether and does not encompass the peptide structure. The third option mentions silicone-based ingredients, which are also distinctly different in their composition and properties compared to peptides.