A student prepares two slides from a thin layer of cells from a young plant stem. The student adds iodine solution to one slide and water to the other, then examines both slides using a light microscope.
Explain why the nucleus is easier to distinguish in the cells on the slide with iodine solution.
Explain whether the cells on the slide with iodine solution can carry out living processes.
130 exam-style questions on OCR GCSE Biology 1.1 Cell structures, covering 1.1.1 Viewing cells with light microscopes, 1.1.2 Sub-cellular structures and functions, and 1.1.3 Electron microscopy and resolution. Each one has a worked solution and a mark scheme showing where the marks go.