Which of the following layers contains carotene in the skin?

The correct choice reflects that the stratum corneum is the layer of the skin where carotene is found. Carotene is a pigment that contributes to the yellow-orange color of the skin and is primarily found in the epidermal layers. The stratum corneum, being the outermost layer of the epidermis, consists of dead keratinized cells that can accumulate pigments like carotene from dietary sources. This accumulation can lead to the skin taking on a slightly yellow-orange hue, particularly in areas where the skin is thicker or more exposed.

In contrast, the other layers of the epidermis, such as the stratum lucidum, stratum granulosum, and stratum spinosum, have different primary functions and cellular compositions. The stratum lucidum is a thin, clear layer found only in thick skin areas (like palms and soles) and does not primarily function in pigment storage. The stratum granulosum contains keratinocytes that are beginning to disintegrate and produce keratin and lamellar bodies, but it is not particularly associated with carotene. The stratum spinosum has a spiny appearance due to desmosomal connections between keratinocytes but does not store carotene either. Thus,