Which of the following processes do normal proto-oncogenes typically exhibit?
A) They normally suppress tumour growth.
B) They enhance tumour growth.
C) They stimulate normal cell growth and division.
D) They are under expressed in cancer cells.

Question

Quizplus · Accepted Answer

Normal proto-oncogenes stimulate normal cell growth and division. It is only when they undergo mutations and become oncogenes that they can enhance tumour growth. Therefore, option A and D are incorrect, and option B only applies to mutated oncogenes.

Which of the Following Processes Do Normal Proto-Oncogenes Typically Exhibit