An optical microscope has a limit of resolution of 0.22 μm0.22\text{ }\mu\text{m}0.22 μm. A high-resolution transmission electron microscope (TEM) has a limit of resolution of 0.11 nm0.11\text{ nm}0.11 nm.
How many times closer can two points be to each other and still be distinguished as separate entities when using this TEM compared to the optical microscope?
200 times200\text{ times}200 times
2000 times2000\text{ times}2000 times
20 000 times20\,000\text{ times}20000 times
2 times2\text{ times}2 times
40 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.