Normal cells are transformed into cancerous neoplastic cells due to physical, chemical or biological agents, which are known as carcinogens. (i) Viral oncogenes Genes of viruses, which cause cancer. (ii) Cellular oncogenes Genes present in normal cells, which become activated under certain conditions and cause oncogenic transformation of the cell.
How do normal cells get transformed into cancerous neoplastic cells? Mention the difference between viral oncogenes and cellular oncogenes.
Answers
Bhagvan das
Normal cells are transformed into cancerous neoplastic cells due to physical, chemical or biological agents, which are known as carcinogens.
(i) Viral oncogenes Genes of viruses, which cause cancer.
(ii) Cellular oncogenes Genes present in normal cells, which become activated under certain conditions and cause oncogenic transformation of the cell.