Heterochromatin is localized Bbibepute opuH OTBET: a. Innon -spiralized regions of the chromosome b. In centromere c. In lysosomes d. Outside the chromosome

The correct answer is a. In non-spiralized regions of the chromosome.<br /><br />Heterochromatin is a type of chromatin that is densely packed and condensed, making it less accessible for transcription. It is found in the non-spiralized regions of the chromosome, which are the regions that are not actively involved in gene expression. This dense packing of heterochromatin helps to keep the genes in these regions silent and prevents them from being transcribed into RNA.