Problem:
Question 1: A gene operon consists of
A) a transcribed gene only.
B) a promoter only.
C) a regulatory gene only.
D) transcribed genes, an operator, and a promoter.
Question 2: Mutations in the proto-oncogene ras and the tumor suppressor gene p53
A) increase protein synthesis by the cell.
B) can improve the chance of avoiding cancer as one ages.
C) can enhance further mutations, which can develop into cancer.
D) disrupt normal regulation of the cell cycle.
Provide the correct answer and justification for your choice.