SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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normal cells and cancer cells both grow slowly
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cancer cells grow at a faster rate than normal cells
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normal cells grow at a faster rate than cancer cells
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cancer cells and normal cells both grow rapidly
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Detailed explanation-1: -For instance, cancer cells: grow in the absence of signals telling them to grow. Normal cells only grow when they receive such signals. ignore signals that normally tell cells to stop dividing or to die (a process known as programmed cell death, or apoptosis).
Detailed explanation-2: -Over time, these cells become increasingly resistant to the controls that maintain normal tissue-and as a result, they divide more rapidly than their progenitors and become less dependent on signals from other cells.
Detailed explanation-3: -The normal cell loses its ability to divide after certain rounds of cell division. But a cancer cell continues to divide even after endless rounds of cell division. A normal cell has the ability to contact inhibition which inhibits its division after contact with other cells.
Detailed explanation-4: -Normal cells follow a typical cycle: They grow, divide and die. Cancer cells, on the other hand, don’t follow this cycle. Instead of dying, they multiply and continue to reproduce other abnormal cells.
Detailed explanation-5: -What is the difference between normal cells and cancer cells in terms of growth? Normal cells stop reproducing once enough cells are present; cancer cells reproduce uncontrollably, even when there are enough cells.