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A-Level Biology OCR A

Dna Chromatin Describe Packaged Chromosome Formation Proteins Histones

DNA is packaged around histone proteins forming chromatin, which condenses into visible chromosomes during mitosis.

DNA is packaged by wrapping around histone proteins to form chromatin, which condenses into chromosomes during mitosis.

Front Describe how DNA is packaged in a chromosome.
Back Formation of chromosomes:
  • DNA is associated with proteins (histones) around which DNA can wrap making it more compact - chromatin
  • During interphase, chromatin is decondensed
  • During mitosis - chromatin is condensed - chromosomes

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