Two cell cultures initially contain equal numbers of cells. Culture P stops increasing in cell number when a complete layer forms. Culture Q continues dividing and forms several layers.
Which observation provides evidence that cells in Q may be cancer cells?
They produce new cells by dividing their nuclei.
They continue dividing after a complete layer forms.
They replicate their DNA before dividing their nuclei.
They produce daughter cells that contain genetic material.
42 exam-style questions on Edexcel GCSE Biology 2.1 Cell division and growth, covering 2.1.1 Mitosis and the cell cycle, 2.1.2 Division producing identical daughter cells, 2.1.3 Cancer and uncontrolled cell division, 2.1.4 Growth in animals and plants, 2.1.5 Importance of cell differentiation, and 2.1.6 Percentile charts to monitor growth. Each one has a worked solution and a mark scheme showing where the marks go.