Suspension culture is a method used in cell biology to grow cells in a liquid medium rather than on solid surfaces. This technique allows cells to remain suspended and evenly distributed, which is beneficial for studying their behavior, growth, and response to various treatments. It is commonly used for mammalian cells, bacterial cultures, and plant cells. In suspension culture, cells are typically maintained in a nutrient-rich solution that provides essential vitamins, minerals, and energy sources. This method is particularly useful for large-scale production of biopharmaceuticals and for research in areas like genetics and toxicology, where understanding cell interactions in a fluid environment is crucial.