Given below are two statements: Statement I: The core of a nucleosome consists of an octamer of histone molecules, which acquire their positive charge due to an abundance of basic amino acid residues like lysine and arginine. Statement II: At a higher level of packaging, regions of chromatin that are densely packed and stain dark are called euchromatin, and they represent the transcriptionally inactive parts of the g

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Refer: NCERT | Class 11 | Page: 76 - 77 | Paragraph: 3- 1,2,44 Statement I is correct because the nucleosome core is formed by a histone octamer. Histones are rich in basic amino acid residues, specifically lysine and arginine, which give them a positive charge to tightly bind the negatively charged DNA. Statement II is incorrect because densely packed and dark-staining regions of chromatin are called heterochromatin, which is transcriptionally inactive. Euchromatin, on the other hand, is loosely packed, stains lig