Flexibility on odd pre-reqs? (Exa. Berkeley)

Certain schools like Berkeley have other pre-reqs like Immunology. Are they flexible on waiving those requirements? I'm almost done with my pre-reqs but i'm unsure how to fit in these classes to my schedule. Has anyone gotten accepted into Optometry school without completing one of the abnormal pre-requisites required by a school?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums