<span>The metabolic activity of a specific region of the living rat brain can be revealed by measurement of Fos protein concentration.
c-Fos is a proto-oncogene that is the homolog of the retroviral oncogene v-fos. It was first discovered in rat fibroblasts as the transforming gene of the FBJ MSV.</span>
A. Kinetic energy is the energy of motion. B,C,D all describe situations where there is not movement.
Interphase is the phase in which the cell grows and develops before mitosis. This is the largest part of the cell's life span.
