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Biology · 2022 · 3 marks
CBSE 2022 · Region 3 · Set 2 · Q10
(a) Explain the property of contact inhibition and its effect on normal human cells and cancerous cells. (b) Why are biological modifiers like α…
(a)
Explain the property of contact inhibition and its effect on normal human cells and cancerous cells.
(b)
Why are biological modifiers like $\displaystyle \alpha$-interferon required for cancer treatment ? How do they act to treat the disease ?
Marking-scheme solution
(a) •Contact inhibition-The property of normal cells by virtue of which contact with other cells inhibits their uncontrolled growth.
Normal cells do not grow any further till 'in contact with other cells', whereas cancerous cells lost this property and continue to divide to form tumor.
(b) ●Destroys tumor
Activates the immune system of patients.
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CBSE Class 12 Biology past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.