Melanin protects from

Options

A. U.V. rays
B. Visible rays
C. Infrared rays
D. X-rays

Answer

### Step-by-Step Solution

1. **Understanding Melanin**: Melanin is a pigment produced in the body, primarily by specialized cells called melanocytes. It is responsible for the color of skin, hair, and eyes.

2. **Role of Tyrosine**: The precursor for melanin is the amino acid tyrosine. This means that melanin is synthesized from tyrosine in the body.

3. **Location of Melanocytes**: Melanocytes are found in various parts of the body, including the skin, eyes, and hair. They play a crucial role in pigmentation.

4. **Effects of Sunlight on Melanin Production**: When exposed to sunlight, particularly UV rays, the body increases melanin production. This is why people often tan when they spend time in the sun.

5. **Protection from UV Rays**: The primary function of melanin is to absorb harmful UV rays from the sun. This absorption helps protect the underlying tissues and organs from damage caused by these rays.

6. **Identifying the Correct Answer**: Given the options, the question asks which rays melanin protects against. Since melanin effectively absorbs UV rays, the correct answer is UV rays.

7. **Conclusion**: Therefore, the answer to the question "Melanin protects from" is UV rays.