Cancer Development and Oncogenic Transformation — NEET Biology
📚 Practice ConceptThe mechanisms that underlie development of cancer or oncogenic transformation of cells, its treatment and control have been some of the most intense areas of research in biology and medicine.
Which of the above statements are correct? S1: Malignant tumor cells are characterized by a loss of contact inhibition and their ability to metastasize through blood. S2: Radiotherapy involves irradiating tumor cells lethally, while chemotherapy primarily uses biological response modifiers to activate the immune system. S3: Computed tomography (CT) utilizes strong magnetic fields and non-ionising radiations for precise detection of physiological changes in living tissues. S4: Proto-oncogenes are normally present in cells and their activation under specific conditions can lead to oncogenic transformation. S5: Early detection of cancers, often based on histopathological studies of tissues, is crucial for successful treatment outcomes.
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