With respect to nucleosome, which of the following statements is incorrect?
Nucleosome contains 120 bp of DNA helix.
Nucleosomes are seen as 'beads-on-string' under Electron Microscope.
DNA is wrapped around positively charged histone octamer to form nucleosome.
Nucleosome is the repeating unit of chromatin.
According to the text, a typical nucleosome contains 200 bp of DNA helix, not 120 bp. The other statements are correct: negatively charged DNA is wrapped around a positively charged histone octamer to form a nucleosome; nucleosomes constitute the repeating unit of chromatin; and they appear as a 'beads-on-string' structure under an electron microscope.
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