Mitosis: Stages and Significance · NCERT Biology

Cells of which layer of the skin are constantly replaced by mitosis?

  1. Dermis
  2. Subcutaneous layer
  3. Stratum basale (basal layer)
  4. Hypodermis
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Correct answer: Stratum basale (basal layer)

The stratum basale is the deepest layer of the epidermis and the site of active mitosis. New keratinocytes produced here push older cells upward toward the surface, continuously replacing those shed from the skin.

Difficulty: Medium Question 17 of 20

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