Question 13 — Which phenomenon inhibits the - Questions at the end of the chapter - Chapter 2 - Cell: The Building Block of Life (Exploration)

Last updated at July 10, 2026 by

Q 13
Question

Which phenomenon inhibits the formation of tumors in the human body? Can plants also develop tumors? Explain.

Image: Animal cells stopping division when they touch each other to show contact inhibition preventing tumours, beside plant cells with rigid walls that do not show contact inhibition.
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Answer
Contact inhibition stops tumours in humans.

Explanation

  • Contact inhibition stops animal cells dividing when they touch.
  • This prevents uncontrolled growth and tumours.
  • Plant cells have rigid walls and do not show contact inhibition.
  • So plants follow a different pattern of growth.
Contact inhibition checks growth; plant cells grow differently.
Contact Inhibition Contact cells touch Inhibition stop dividing When cells touch their neighbours they stop dividing, which inhibits tumour formation; plants rarely form spreading tumours due to rigid cell walls.
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