How are oncogenes and proto-oncogenes different?

a. Proto-oncogenes are activated tumor genes, whereas oncogenes are inactivated tumor suppressor genes.
Formatted: Centered
b. Oncogenes can lead to tumor formation, whereas proto-oncogenes prevent tumor formation.
c. Oncogenes can lead to tumor formation, whereas proto-oncogenes are inactivated forms of oncogenes.
d. Oncogenes are tumor suppressors, whereas proto-oncogenes cause tumor formation.

Correct Answer: C