Stem cells are grown in a laboratory before transplantation. A sample is found to contain a virus.
Which action most directly reduces the risk to the patient?
Mix the contaminated cells with healthy cells before transplantation.
Use fewer contaminated cells to remove the possibility of infection.
Discard the contaminated cells and obtain an uncontaminated culture.
Grow the contaminated cells for longer to increase their number.
46 exam-style questions on Edexcel GCSE Biology 2.2 Stem cells, covering 2.2.1 Function of stem cells and meristems and 2.2.2 Benefits and risks of stem cells. Each one has a worked solution and a mark scheme showing where the marks go.