BRAINCAKEThe Nucleus
The nucleus is the largest organelle in the cell.
It contains a substance called chromatin which is made from DNA - the genetic material - bound to proteins called histones.
Structures called chromosomes become visible at the start of nuclear division when the DNA and histones tightly supercoil.
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Key terms in this lesson
- ribosome
- A small organelle, made of RNA and protein, that is the site of protein synthesis.
More in Cell Structure
- Measuring Cells
- Electron Microscope
- Transmission Electron Microscope
- Scanning Electron Microscope
- Mitochondria
- Chloroplasts
- Endoplasmic Reticulum
- Golgi Apparatus
All 26 lessons in Cell Structure · All AQA AS-level Biology topics