Cell Lines - GCSE Biology Definition

Cell lines are groups of cells that are grown in a lab and can keep dividing for a long time, which allows scientists to study them. These cells originally come from a single cell and replicate to form a population that is genetically almost identical. They are often used in research to learn more about diseases, test new medicines, and understand how cells work because they can be kept alive outside the human body for long periods. This is important for scientific experiments since it helps researchers observe how cells react to different conditions.