LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is melanoma?
A
cancer of blood cells
B
cancer of lung cells
C
cancer of brain cells
D
cancer of pigmented cells
Explanation: 

Detailed explanation-1: -A form of cancer that begins in melanocytes (cells that make the pigment melanin). It may begin in a mole (skin melanoma), but can also begin in other pigmented tissues, such as in the eye or in the intestines.

Detailed explanation-2: -Acquired gene mutations For example, ultraviolet (UV) rays are clearly a major cause of melanoma. UV rays can damage the DNA in skin cells. Sometimes this damage affects certain genes that control how the cells grow and divide. If these genes no longer work properly, the affected cells may become cancer cells.

Detailed explanation-3: -Asymmetry. The shape of one-half of the mole does not match the other. Border. The edges are ragged, notched, uneven, or blurred. Color. Shades of black, brown, and tan may be present. Diameter. The diameter is usually larger than 6 millimeters (mm) or has grown in size. Evolving.

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