Solve this multiple-choice question and choose the correct option.

Human skin pigmentation response: Why does skin become darker after excess sun exposure? Identify the specific pigment that increases following UV exposure. Choose the correct pigment.

Difficulty: Easy

Melanin
Carotene
Hemoglobin
Bilirubin

Correct Answer: Melanin

Explanation:

Concept / ApproachUV exposure stimulates melanocytes to produce more melanin, which darkens the skin and helps protect underlying tissues from UV damage.

Why others are incorrectCarotene is a dietary pigment; hemoglobin colors blood; bilirubin is associated with jaundice.

Final AnswerMelanin.

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