16 December, 23:47
All your cells contain proto-oncogenes, which can change into cancer-causing genes. Why do cells possess such potential time bombs?
A. Cells produce proto-oncogenes as a by-product of mitosis.
B. Proto-oncogenes are necessary for the normal control of cell growth and division.
C. Proto-oncogenes protect cells from infection by cancer-causing viruses.
D. Proto-oncogenes are unavoidable environmental carcinogens.
E. Proto-oncogenes are genetic junk that has not yet been eliminated by natural selection.
17 December, 00:34
Proto-oncogenes contain proteins that stimulate cell division, inhibit cell differentiation, and prevent cells from dying. These processes are important for normal development and for the maintenance of tissues and organs.
An alternation of these proto-oncogenes leads to the formation of oncogenes which are particularly responsible for abnormal cell division resulting in cancer cells
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» All your cells contain proto-oncogenes, which can change into cancer-causing genes. Why do cells possess such potential time bombs? A. Cells produce proto-oncogenes as a by-product of mitosis. B.