CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The cells lack cyclin.
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The petri dish inhibits cell growth.
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Contact with other cells stops cell growth.
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Most cells grown in petri dishes have a defective p53.
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Detailed explanation-1: -Which of the following explains why normal cells grown in a petri dish tend to stop growing once they have covered the bottom of the dish? Contact with other cells stops cell growth.
Detailed explanation-2: -Senescence-in which cells stop growing and dividing-results from serious stress and genetic damage, says study coauthor Stephen Elledge, a geneticist at Harvard Medical School.
Detailed explanation-3: -Terms in this set (45) When cells are grown in a laboratory, which is a factor that can stop normal cells from dividing? obtaining enough food.
Detailed explanation-4: -Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. If cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space.
Detailed explanation-5: -For instance, when normal cells grown in a dish are crowded by neighbors on all sides, they will no longer divide. Cancer cells, in contrast, keep dividing and pile on top of each other in lumpy layers.