Oops, sorry, I need to amend my response on which classes sub for what: Here's the response from the Career Center last year:
We don't send any letters to med schools on
>behalf of individual applicants. There is a letter that explains our chem
>sequence, it is available in the lab at 2111 Bancroft.
>However...
>I would not send the letter explaining our chem sequence unless someone
>questions your chem readiness and I doubt they will. Nervous people send
>the letter everywhere - med schools tell us not to bother. If a secondary
>asks you to name specific classes that fulfill specific pre reqs, then say
>1a/3a are general chem and 3b and mcb 102 are org chem. 3a is sort of a
>wild card class.
>
>SEE
http://career.berkeley.edu/Health/MedApp.stm#secondary for more ideas
>on what to expect.
>
>The cover page for the letter service states clearly that we do not have a
>pre professional committee process at UC Berkeley. When you request your
>letters to be sent from the letter service on line, this cover page is
>sent. You will do to this upon the request of a medical school that sends
>you a secondary.
>No other letter is likely needed.