Topic 1. Tumor protein p53. This is a library-research topic in which you are required to state your source, in the form of a web-link or other format. In your own words, please address issues (a) and (b).

• (a) Describe the role of p53 in normal cell division.
• (b) Explain why mutations of the p53 gene are often associated with cancer.
• Reminder: You may use quotations from your source, as long as the quote is brief. Ensure that most of the post is in your own words.