BRAINCAKENucleus
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
- organelle
- A membrane-bound structure within a cell with a specific structure suited to a specific function.
More in Cell Structure
- Eukaryotic Cell Structure
- Compartmentalisation
- Nucleolus
- Mitochondria
- Vesicles
- Lysosomes
- The Cytoskeleton
- Cell Movement
All 26 lessons in Cell Structure · All OCR AS-level Biology topics