CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mutations in their DNA
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Sending improper signals to surrounding cells
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Responding improperly to chemical signals
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They fail to replicate their DNA in interphase.
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Detailed explanation-1: -Cancer is the result of unchecked cell division caused by a breakdown of the mechanisms regulating the cell cycle. The loss of control begins with a change in the DNA sequence of a gene that codes for one of the regulatory molecules. Faulty instructions lead to a protein that does not function as it should.
Detailed explanation-2: -Unlike healthy cells, cancer cells don’t carry on maturing or become so specialised. Cells mature so that they are able to carry out their function in the body. This process of maturing is called differentiation. In cancer, the cells often reproduce very quickly and don’t have a chance to mature.
Detailed explanation-3: -Genetic changes that cause cancer can be inherited or arise from certain environmental exposures. Genetic changes can also happen because of errors that occur as cells divide. Yes, cancer is a genetic disease. It is caused by changes in genes that control the way cells grow and multiply.
Detailed explanation-4: -Many, But Not All, Cancer-Causing Agents Damage DNA These cancer-causing mutagens include chemical carcinogens, viruses, and various forms of radiation-UV light and ionizing radiation such as gamma rays and alpha particles from radioactive decay.