A proto-oncogene differs from a tumor suppressor gene because a proto-oncogene
A) may cause cancer if mutated, whereas a tumor suppressor gene cannot.
B) stimulates mitosis in a normal cell, whereas a tumor suppressor gene inhibits mitosis.
C) only activates enzymes in a cell that allows metastasis.
D) inhibits the cell cycle, whereas a tumor suppressor accelerates the cell cycle.
E) promotes meiosis, whereas a tumor suppressor gene promotes mitosis.

Question

Quizplus · Accepted Answer

Proto-oncogenes promote cell division under normal conditions, while tumor suppressor genes inhibit cell division, preventing uncontrolled cell growth. Mutation in proto-oncogenes can lead to cancer by overstimulating cell division, whereas mutations in tumor suppressor genes can lead to cancer by failing to inhibit cell division.

A Proto-Oncogene Differs from a Tumor Suppressor Gene Because a Proto-Oncogene