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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absence of cyclins in the DNA
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multiple gene mutations on a chromosome of DNA
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uncontrolled cell growth caused by mutations in genes that control the cell cycle
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presence of genetic defects caused by hereditary disorders
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Detailed explanation-1: -Most cancer-causing DNA changes occur in sections of DNA called genes. These changes are also called genetic changes. A DNA change can cause genes involved in normal cell growth to become oncogenes. Unlike normal genes, oncogenes cannot be turned off, so they cause uncontrolled cell growth.
Detailed explanation-2: -Cancer is a disease in which some of the body’s cells grow uncontrollably. There are many different types of cancer, and each begins when a single cell acquires a genomic change (or mutation) that allows the cell to divide and multiply unchecked.
Detailed explanation-3: -Oncogenes. These turn a healthy cell into a cancerous cell. Mutations in these genes are not known to be inherited.
Detailed explanation-4: -Unit 5.1: Definition of Cancer. The American Cancer Society (ACS) defines cancer as a group of diseases characterized by uncontrolled growth and spread of abnormal cells. If the spread is not controlled, it can result in death.