CELL DIVISION
THE CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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that cancer cells continually cycle through mitosis
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cancer cells spend the majority of their time in the G1 phase
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cancer cells always stop at check points
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nothing is all that special about cancer cells
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Detailed explanation-1: -Unlike normal cells, cancer cells don’t stop growing and dividing when there are enough of them. So the cells keep doubling, forming a lump (tumour) that grows in size.
Detailed explanation-2: -Differences between Cancer Cells and Normal Cells 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-3: -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. These cells can invade body parts, such as the breast, liver, lungs and pancreas.
Detailed explanation-4: -Cell Division Summary Replication errors may also be corrected after they occur. Normal cells stop dividing when there is genetic damage or conditions are not favorable. Cancer cells continue to divide even when conditions are not appropriate.
Detailed explanation-5: -1. What is cancer? Cancer is essentially a disease of mitosis-the normal ‘checkpoints’ regulating mitosis are ignored or overridden by the cancer cell. Cancer begins when a single cell is transformed, or converted from a normal cell to a cancer cell.