Instructions: Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
Input: Question: Mutations that lead to cancer usually occur in genes that control the cell cycle. these include tumor-suppressor genes and what? Answer: proto-oncogenes
Output:
Mutations that lead to cancer usually occur in genes that control the cell cycle. These include tumor-suppressor genes and proto-oncogenes.