My son is at Case, and his experience has been great so far. I do not know about Biology, but Case is strong in BioMed (#12) and other healthcare related fields. The school also has close ties to University Hospital and nationally known Cleveland Clinic.
Before my son made his final decision we compared graduate placement for engineers who did not continue at their undergrad, and Case compared favorably to CMU, with students landing at top schools like CMU, Cornell, Johns Hopkins, MIT, UIUC, Harvard and UofM. I could not find a breakout for Biology, but the School of Arts and Sciences placed students at top schools like BU, Columbia, Duke, Northwestern, U Penn, Johns Hopkins and MIT. In summary, strong students from Case do very well in graduate school admissions.