Focuses on the biophysics governing the structure/function of enzymes, cells, extra-cellar matrix and tissue. Synthesizes ideas from molecular biology, physics, and biochemistry, emphasizing how low Reynolds number physics, not Newtonian physics, is relevant to life inside a cell. Fulfills MCDB scientific reasoning requirement. Recommended prerequisites: MCDB 3135 and MCDB 3145 and PHYS 2010 and PHYS 2020 and CHEM 1133 or MATH 1300 and/or CHEM 3311 (minimum grade C-) or instructor consent required. Same as PHYS 5550 and MCDB 4550 and MCDB 5550.