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प्रश्न
How do normal cells get transformed into cancerous neoplastic cells? Elaborate giving three examples of inducing agent.
उत्तर
Transformation of normal cells into cancerous neoplastic cells may be induced by following physical, chemical or biological agents causing DNA damage:
- Ionising radiations like X-rays and gamma rays
- Non-ionizing radiations like UV.
- Chemical carcinogens present in tobacco smoke
- Cellular oncogenes (c-onc) or proto-oncogenes, when activated under certain conditions cause cancer. Viruses with oncogenes can transform normal cells to cancerous cells
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संबंधित प्रश्न
Explain the various types of cancer
Name any two techniques that are useful in detecting cancers of internal organs.
Why are cancer patients often given α-interferon as part of the treatment?
How is a cancerous cell different from a normal cell?
- How is a tumor formed in the body?
- What are the two types of tumor?
- Which of these under goes metastasis?
Cancer cells are more easily damaged by radiations than normal cells because they are ______.
Carcinogens are cancer causing agents.
How is a cancer cell different from a normal cell?
The cancer that generally affects lymph nodes and spleen is ______.
In the given flow diagram, the replication of retrovirus in a host is shown. Observe and answer the following questions.
Fill in (1) and (2)
Why is the virus called retrovirus?
Can the infected cell survive while viruses are being replicated and released?
