Colorado Cosmetology Written Practice Exam

The folds of skin on either side of the nail groove are called the nail bed. The nail bed is the layer of skin beneath the nail plate and plays a role in nail growth and health. The other options are incorrect because the free edge refers to the tip of the nail, the sidewalls are the sides of the nail, and the lunula is the white crescent-shaped area at the base of the nail. While all these options are related to the nails, they do not specifically refer to the folds of skin on either side of the nail groove. Therefore, they are not the correct answer to this question.