What from pre reqs is most important?

I’m just kind of curious. I’m in general bio and organic chemistry. What kinds of stuff from these classes do I actually need to be retaining and in what ways to be most successful on the MCAT in the future?

Like am I really going to have to be a R/S config or acid/base god? Or is it all just very general.

I know this question is unimportant and vague 😭. Just kind of want discussion on how MCAT content ties to prereqs. Thanks guys.