Question
What are chromatin? Why are they seen as ‘beads on string’ structure under electron microscope?
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Answer
One nucleosome contains approximately 200 base pairs of DNA helix. Nucleosomcs are the repeating units of chromatin, which are threadlike stained 1colo"r.d) bodies. present in nucleus, The nucleosomes in chromatin look like 'beads-on-string' when observed under an Electron Microscope (EM).
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