A student uses a light microscope to observe plant epidermal cells.
The student uses an eyepiece lens with a magnification of ×\times× 12 and an objective lens with a magnification of ×\times× 40. Calculate the total magnification of the microscope.
The student is asked to produce a scientific drawing of a single epidermal cell. Describe three rules or guidelines the student must follow to ensure their drawing is scientifically accurate.
To view smaller organelles, such as ribosomes, the student must switch to an electron microscope. Give two reasons why an electron microscope can show detailed internal structures of cells that cannot be seen using a light microscope.
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.