Biochemistry and biophysics both are basic medical sciences. Biochemistry mainly deals with the chemical aspects of a living system which involves chemical nature of biomolecules, chemical composition etc. However, biophysics deals with Physics of a living system which involves first of all physiology and basic functioning of a living system. Further, it involves utilization core physics concepts to understand various mechanisms and principles on which our body system work like bio-mechanics which deals with physics of bones, various physical concepts are involved here. Biophysics also involve science of imaging which utilizes radiation biophysics to diagnose and treat various pathological states including cancer
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These two majors are similar in the course work requirements. The major difference is that a six-credit sequence in Biochemistry (BBMB 404, 405) can be accepted in the Biophysics major in lieu of the eight-credit sequence (BBMB 501, 502) that is required of Biochemistry majors. This reduction in required credits is intended to accommodate additional coursework in physics that is not required in the Biochemistry major. The other major difference between the two majors is in the qualifying examination process, which focuses on the subject matter specific to either Biophysics or Biochemistry.
Source:Iowa State University