Cheek cells are animal cells. They can be collected by gently rubbing the inside of the mouth with a cotton bud.
What does the cell membrane of a cheek cell do?
It is fully permeable, so all substances pass through it.
It holds the cytoplasm and organelles inside the cell.
It supports the cell and stops it bursting when water enters.
It is where most of the cell's chemical reactions happen.
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.