A virus can cause a cell to produce too much of a protein during Gap 1 ("G1" phase). The abnormally high amount of the protein can signal the cell to engage in apoptosis, or programmed cell death. This type of disruption in the cell cycle is a direct cause of a disease that involves
^ an infestation of parasites. such as malaria
B. infection, such as smallpox.
C. memory loss, such as Alzheimer's disease.
the growth of tumors. such as pancreatic cancer.