I have done two projects in the area of melocularmolecular biology. I have a Master's degree. So, I find that it requires more than 20 minutes to talk about them. My first-language is not English. I think this is too long, right? I would be tired, and the interviewer may also be tired. We may need additional time to discuss the research projects I did. So, should it be short? How many minutes are appropriate?