NEET BIOLOGY

Detailed explanation-1: -Cancer is a disease caused when cells divide uncontrollably and spread into surrounding tissues. Cancer is caused by changes to DNA. Most cancer-causing DNA changes occur in sections of DNA called genes.

Detailed explanation-2: -Cancer is an uncontrolled growth of cells leading to phenotypic expression in many forms, from mild to life-threatening. Cancer can develop in many ways, either from DNA damage, a mutation in the DNA or any product of that DNA, or by loss of function of the regulatory and repressor systems in the cycle.[9]

Detailed explanation-3: -These cells may form a mass called a tumor. A tumor can be cancerous or benign. A cancerous tumor is malignant, meaning it can grow and spread to other parts of the body. A benign tumor means the tumor can grow but will not spread. Some types of cancer do not form a tumor.

Detailed explanation-4: -Enlarge. Normal cells may become cancer cells. Before cancer cells form in tissues of the body, the cells go through abnormal changes called hyperplasia and dysplasia. In hyperplasia, there is an increase in the number of cells in an organ or tissue that appear normal under a microscope.

Detailed explanation-5: -Cancer is basically a disease of uncontrolled cell division.