Which statement best explains why electron microscopes are able to resolve detailed sub-cellular structures, such as the cristae of mitochondria, that cannot be seen with standard light microscopes?
Electron microscopes have a higher resolving power because electron beams have a much shorter wavelength than visible light.
Electron microscopes use visible light with electromagnetic lenses to magnify specimens up to ×1500\times 1500×1500.
Electron microscopes allow scientists to view living, active organelles in real-time at very high magnifications.
Electron microscopes use glass lenses to focus electrons, resulting in a lower resolution but a higher magnification.
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.