Ionising radiation is directed at a small region of a seedling root. In one part of this region, enough cells die for the root tissue to stop working properly. In another part, a cell continues to function but has an altered DNA sequence.
Which conclusion follows from these findings?
The part that stops working has tissue damage, while the altered DNA in the living cell is a mutation.
Both findings are mutations because radiation has produced lasting changes in the root.
The part that stops working has a mutation, while the altered DNA in the living cell is tissue damage.
Both findings are tissue damage because radiation has affected cells in the same root.
97 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity, covering 6.5.1 Uses of radioactivity, 6.5.2 Dangers of ionising radiation and precautions, 6.5.3 Half-life and radiation dangers, 6.5.4 Safety precautions for radiation exposure, and 6.5.5 Contamination and irradiation. Each one has a worked solution and a mark scheme showing where the marks go.