For those who have transferred to Cal in Bio?

How difficult does it compare to the cc? I was accepted to cal for the upcoming Fall semester but am I bit worried on whether it will devastate my GPA or not (here lots of grade deflation). I had a 3.7 at my cc and honestly struggled a lot. So for those of you that have transferred, how difficult is to get A’s or B’s compared to the cc? Did your GPA stay the same?
Any advice would be appreciated.