Cellular molecular and microbial biology cmbi is the study of how single celled organisms and cells function at a molecular level during the course of your studies much of your learning will occur while actively working on problems in class during tutorials and in the laboratory as a student in cmbi youll get a broad perspective on diverse . The cellular molecular and microbial biology cmmb program at the university of montana is one of six graduate programs in the molecular and biomedical sciences umbrella graduate program reflecting the breadth of biology cmmb houses a vibrant group of faculty working on timely problems using a variety of approaches and model organisms. Cellular microbiology is revealing how pathogenic bacteria interact with host cells in what is turning out to be a complex evolutionary battle of competing gene products molecular and cellular biology are no longer discrete subject areas but vital tools and an integrated part of current microbiological research. The key difference between microbiology and molecular biology is that microbiology is the study of microorganisms whereas molecular biology is the study of biological activities at molecular level both of them are recently developed branches of biology and the advancement of science in this two areas result in many new applications