Question:
The viruses that possess oncogenes are mainly responsible for causing:
The viruses that possess oncogenes are mainly responsible for causing:
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Oncogenic viruses integrate oncogenes into host genome $\rightarrow$ uncontrolled cell growth $\rightarrow$ cancer.
Updated On: May 26, 2026
- Cancer
- AIDS
- Cirrhosis
- Cystic fibrosis
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Oncogenes and viral carcinogenesis.
Step 2: Meaning
Oncogenes are genes that, when activated or mutated, can cause uncontrolled cell proliferation leading to cancer.
Step 3: Analysis
Viruses with oncogenes (oncogenic/tumour viruses) integrate their genetic material into host DNA and activate or introduce oncogenes, driving tumour formation. Examples include HPV (cervical cancer), HTLV-1 (leukaemia), and HBV (hepatocellular carcinoma). AIDS is caused by HIV (no oncogene); cirrhosis by hepatic damage; cystic fibrosis is a genetic disorder.
Step 4: Conclusion
Viruses with oncogenes mainly cause cancer. Final Answer: (A)
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