FWIW, transferring to UCB from a 4-year university is going to be extremely difficult if not impossible depending on major. It will be impossible with a bio major or any in the college of letters and sciences.
(That is UCB specific scenario, but I don’t want to derail the thread…)
So really, it’s either going to community college then transferring or sticking to a 4-year institution if you’re hoping for medical school.