Question 4

Melanin is the primary contributor to skin color.

Melanin is the pigment responsible for the coloration of skin, hair, and eyes, making it the primary contributor to skin color.

A) Keratin

Keratin is a fibrous structural protein found in skin, hair, and nails, contributing to their strength and resilience. However, it does not play a significant role in determining skin color, which is primarily influenced by the presence of melanin.

B) Eleidin

Eleidin is an intermediate form of keratin, primarily found in the stratum lucidum layer of the epidermis. While it may contribute to the overall texture and appearance of skin, it does not affect skin color, making it an incorrect choice.

C) Melanin

Melanin is the correct answer, as it is the primary pigment that gives skin its color. Different types and amounts of melanin produced by melanocytes in the skin determine the various shades of skin color observed in humans.

D) Elastin

Elastin is a protein that provides elasticity to the skin and helps it maintain its shape. While it contributes to the overall health and appearance of the skin, it does not influence skin color, therefore rendering it an incorrect option.

Conclusion

Melanin is definitively the primary contributor to skin color, as it directly affects pigmentation. Other options like keratin, eleidin, and elastin, while important for skin structure and function, do not influence skin color significantly, confirming that melanin is the correct choice.