An epidermal growth factor (EGF) stimulates a cell to enter mitosis by binding to a receptor on the cell's plasma membrane. The EGF receptor is a product of a ____ gene.

A) repressor
B) structural
C) master
D) proto-onco
E) growth

Proto-Onco Gene

A normal gene which, when altered by mutation, becomes an oncogene that can contribute to cancer.

Epidermal Growth Factor

A protein that stimulates cell growth, proliferation, and differentiation by binding to its receptor, EGFR, on the cell surface.

Plasma Membrane

The double layer of lipids surrounding the cell's cytoplasm, controlling the entry and exit of materials to and from the cell.