Hope you are doing good. . You can refer to their official website. The department of medical microbiology of Madras University.

Here is the link to the official website.

https://www.unom.ac.in/index.php?route=department/department/deptpage&deptid=50

also here is the direct link to the website where you can enter the subject code and get the PDF of previous year question paper directly.

https://egovernance.unom.ac.in/qpregular/question_main.asp

how so you can search Google for previous year question papers of Madras University I cannot provide you direct links to other websites.

if you have any more doubts you can ask them in the comment section I would be more than happy to help you.