Cancers are diseases that are still mostly unknown to humankind and is caused by abnormal cell growth in parts of a body. Unlike normal cells, cancer cells do not have an order to grow, divide and die, in fact, they never know when to stop dividing and can clump up into a very small space while still dividing. When the cells cluster together in a tight space, then a tumor is formed.
Then, why do cancer cells keep reproducing? Simply because just like blood cells and sperm cells, cancer cells know how to create telomerase to rebuild telomeres. Telomeres are on the ends of a cell and everytime a cell goes through mitosis, the telomere is cut a little shorter, until there is no more telomere, then the cell cannot reproduce and dies.
Curing cancer?... so if we can simply take away the telomerase from cancer cells, we cure cancer? technically, yes but then blood cells and sperm cells wont reproduce either and you will die. Therefore if we can only focus killing telomere of the cancer cells, then we can cure cancer.
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