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Cancer cells differ from normal cells primarily by
Ahaving no nucleus (typical)
Bbeing immune to viruses
Cuncontrolled, contact-independent cell division
Dsynthesising no proteins
Answer & Solution
Correct answer: C. uncontrolled, contact-independent cell division
1. Normal cells stop dividing on contact (contact inhibition).
2. Cancer cells lose this property and continue dividing in an uncontrolled fashion.
3. They also evade apoptosis and can invade other tissues (metastasis).
_Source: Maharashtra Balbharati Std XII Biology, Ch 9 "Human Health and Diseases" §9.7_
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