Molecular biologists study the structure and function of molecules essential for life, particularly DNA, RNA, and proteins. They explore how these molecules interact within cells to regulate biological processes, such as gene expression and cell division. Their work often involves techniques like PCR (polymerase chain reaction) and gel electrophoresis to analyze genetic material. These scientists play a crucial role in various fields, including genetics, biotechnology, and medicine. Their research can lead to advancements in understanding diseases, developing new therapies, and improving agricultural practices. By uncovering the molecular mechanisms of life, they contribute to our knowledge of biology and its applications.