[Campbell Biology P.441] The text states that "The absence or excess expression of these rec... | Practice Question

The text states that "The absence or excess expression of these receptors can cause aberrant cell signaling, leading in some cases to inappropriate cell division, which can contribute to cancer." Based on this information, what is the most direct consequence of a high expression of HER2 in breast cells?

  • A: Reduced cell growth due to feedback inhibition.
  • B: Normalization of cell signaling pathways.
  • C: Increased and uncontrolled cell division.
  • D: Conversion of HER2 into a steroid receptor.

Explanation

The text explicitly states that "excess expression of these receptors can cause aberrant cell signaling, leading in some cases to inappropriate cell division, which can contribute to cancer." Increased and uncontrolled cell division is the direct outcome of 'inappropriate cell division' and a contribution to cancer.