BRAINCAKEChromosomes
Chromosomes are made of long thin molecules of DNA coiled around packaging proteins called histones.
The histones bind to and condense the DNA molecule to maintain its integrity.
The DNA and histone complex is in the nucleus and is called chromatin.
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Key terms in this lesson
- plasmid
- A small, circular loop of DNA, separate from the main chromosome, found in the cytoplasm of prokaryotic cells.
- prokaryotic cell
- A cell with no nucleus or membrane-bound organelles, found in bacteria.
- eukaryotic cell
- A cell with a nucleus and membrane-bound organelles, found in animals, plants, fungi and protoctists.
- chromatin
- The complex of DNA loosely coiled around histone proteins found in the nucleus between cell divisions.
- interphase
- The phase of the cell cycle in which the cell grows, carries out its normal functions and replicates its DNA before division.
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