Michigan Esthetician State Board Practice Exam

Proteins are primarily composed of what?

1. Fatty acids

2. Sugars

3. Amino acids

4. Vitamins

The correct answer is: Amino acids

Proteins are primarily composed of amino acids, which are the building blocks of proteins. There are 20 different amino acids that combine in various sequences to form proteins, each with a unique function in the body. Amino acids link together through peptide bonds to create polypeptide chains, which then fold into complex three-dimensional structures to perform diverse roles, including enzyme activity, cell signaling, and providing structural support. Understanding that proteins are made of amino acids is crucial in the field of esthetics, particularly when considering how protein-related products can affect skin health and repair. Dietary sources rich in proteins, such as meats, legumes, and dairy, provide essential amino acids that the body cannot produce on its own. This knowledge is important for estheticians when advising clients about nutrition and skin care products that promote healthy skin. The other options include components that are not related to the structure of proteins. Fatty acids are primarily associated with lipids, sugars are the basis of carbohydrates, and vitamins are organic compounds needed in small amounts for various metabolic processes. Each plays an important role in overall health, but they do not compose proteins.