Answer:
Oncogenes are mutated protooncogenes (see explanation below).
Explanation:
“Proto-oncogene” is the name given to various genes whose products stimulate cell proliferation. Examples may include growth factor receptors, and proteins involved in clearing cell cycle checkpoints. Mutations in a proto-oncogene may cause it to either become too rapidly transcribed and/or code for a product that functions in an unchecked manner. This may lead to unrestrained cell proliferation, a basic mechanism of cancer. When and if this mutation takes place, the proto-oncogene becomes known as an oncogene.
