Biogen interview questions

I applied to a position online and I received an email about this position 2-3 weeks later to arrange for a phone interview. After my phone interview I waited for 1.5 more weeks for a phone call requesting a face-to-face interview. The interview was scheduled for 2 weeks later. Everyone I spoke to was very polite and the assistant made sure I had travel plans to go to the interview. She They gave me detailed instructions on what to bring with me for my interview so I was prepared. When I arrived at the building all I had to do was speak to the security guard to get checked-in. The person I spoke with during the phone interview came to pick me up and brought me to his office. After I spoke with him I spoke with another veteran of the company. Then we took a break for lunch where I met other employees who are already in the position I am applying for. My last interview of the day consist of a 4:1 interview where RA IV and up employees interviewed me. The last 4:1 interview consists of a lot of specific and detailed question aboutchemistry. Overall Everyone was very polite and friendly. Everyone greeted each other in the hallways and the environment was very bright.