Question

when a cell does not pass \inspection\ at a checkpoint it may be routed for repair or if unrepairable will undergo:
gene-regulation
necrosis
proteolysis
apoptosis
thrombosis

Explanation:

Cell cycle checkpoint failure leads to repair attempts; irreparable cells undergo programmed cell death. Gene-regulation controls gene expression, necrosis is unplanned cell death from injury, proteolysis breaks down proteins, thrombosis is blood clot formation. Apoptosis is the controlled, programmed cell death pathway for irreparable checkpoint-failed cells.

Answer:

D. apoptosis