Whether it's clinical research or a purely scientific research laboratory, you are likely to work with cells. The interviewer asks about your experience with cell culture and the types of cell culture-based assays you've performed to assess your suitability for the job. They want to know if you have the necessary skills and knowledge to handle the responsibilities of the position, such as maintaining cell lines, performing cell-based assays, and troubleshooting technical issues. Additionally, the interviewer is interested in understanding the depth and breadth of your experience in cell culture, which could influence their decision to offer you the job. Overall, it's essential to be prepared to discuss your cell culture experience and provide specific examples of your work in this area during the interview.