- A BRCA1 mainly, among tumour suppressors
- B p53 (the guardian of the genome)
- C Oncogenes such as RAS and MYC
- D APC mainly, among tumour suppressors
Correct answer: B. p53 (the guardian of the genome)
Explanation: p53 is a tumor suppressor protein. Mutated in >50% of human cancers. It normally stops cell cycle or triggers apoptosis when DNA is damaged.
Concept context
Mitosis and meiosis: how cells divide for growth, repair, and reproduction.