Culture Medium - GCSE Biology Definition

A culture medium is a substance that provides the necessary nutrients for microorganisms, like bacteria or fungi, to grow and reproduce. It can be a liquid or solid gel, such as agar, and contains all the essential elements such as sugars, proteins, vitamins, and minerals that these tiny organisms need to survive. In GCSE Biology, students learn how scientists use culture mediums in laboratories to grow and study microorganisms under controlled conditions. This helps them understand how these organisms behave, how they can cause diseases, and how we can use them beneficially in processes like making antibiotics or studying biological processes.