just admitted, changing majors

What are the requirements for transferring into bio or biochem?
also when is the earliest you can transfer?

Here is the information to change majors:
http://cnasstudent.ucr.edu/majors/BIOL_COM_Criteria_Updated17F.pdf

http://cnasstudent.ucr.edu/majors/BCH_COMCriteria_17-18.pdf

The earliest you can change majors is after you completed the required courses with the required GPA.