Biology 9700 · AS & A Level · Replication and division of nuclei and cells

Replication and division of nuclei and cells — practice question

Which statement correctly explains how carcinogens affect lung tissue and lead to tumour formation?

  • ACells in damaged alveoli walls divide more rapidly to replace damaged areas.
  • BCilia are paralysed and mucus accumulates in the lungs causing DNA to change.
  • CDNA changes, causing bronchial epithelial cells to divide by mitosis in an uncontrolled way.
  • DHaemoglobin carries less oxygen, causing bronchial cells to divide by mitosis in an uncontrolled way.

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