Students seeking a doctoral degree in biochemistry and molecular biology, cell and molecular biology, genetics and genome sciences, microbiology, genetics and immunology, pharmacology and toxicology, or molecular, cellular, and integrative physiology should apply through the BioMolecular Science Gateway—First Year for admission to any of these Ph.D. programs. Students should select the Ph.D. program in which they have the greatest interest. During the first two semesters of enrollment, students will have the opportunity to choose and complete at least four courses in appropriate disciplinary subjects. In the spring semester of the first year, they will have the opportunity to continue with the Ph.D. program initially selected or change to one of the other five programs that aligns most closely with their educational goals. For additional information about the individual Ph.D. programs, refer to the statements in the Departments of Biochemistry and Molecular Biology, Microbiology, Genetics, and Immunology, and Physiology in the College of Natural Science section of this catalog, statements on the programs in Cell and Molecular Biology and Genetics and Genome Sciences in the College of Natural Science section of this catalog, and statement on the Department of Pharmacology and Toxicology in the College of Osteopathic Medicine section of this catalog.