Read the following statements regarding the packaging of DNA helix in eukaryotes: (i) The 'beads-on-string' structure in chromatin is packaged to form chromatin fibers. (ii) Packaging of chromatin at higher levels requires an additional set of proteins called Non-Histone Chromosomal (NHC) proteins. (iii) Heterochromatin regions of chromatin are loosely packed and stain light. (iv) A typical nucleosome contains 200 ba

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Statement (i) is correct as the 'beads-on-string' structure in chromatin is packaged to form chromatin fibers, which further coil and condense at the metaphase stage to form chromosomes. Statement (ii) is correct because the packaging of chromatin at higher levels requires an additional set of proteins collectively referred to as Non-Histone Chromosomal (NHC) proteins. Statement (iii) is incorrect. Heterochromatin is densely packed and stains dark, whereas euchromatin is loosely packed and stains light. Statement (