CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Fail to complete S phase.
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Mutate during G1 phase.
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Repeat the cell cycle continuously.
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Die after completing mitosis.
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Detailed explanation-1: -A normal cell with unfixable DNA damaged will undergo apoptosis. A cancer cell with unfixable DNA damage will not undergo apoptosis and will instead continue dividing.
Detailed explanation-2: -Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.
Detailed explanation-3: -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-4: -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-5: -DNA Synthesis (S phase) In many cancer cells the number of chromosomes is altered so that there are either too many or too few chromosomes in the cells. These cells are said to be aneuploid. Errors may occur during the DNA replication resulting in mutations and possibly the development of cancer.