In the biology lab, you observe animal cells under a microscope. in one slide you see the nucleus with two nucleolus areas of compact chromatin. the value in packaging dna in tighter forms of chromatin is for

1-     To regulate and protect DNA during transcription: The highly compacted chromatin is not accessible to transcriptional enzymes. Therefore only the region that is unwinded will be accessible for transcription or repair.

2-     Mobility and protection of the DNA molecule during mitosis: The DNA compaction protects chromosomes from breakage during mitosis

The DNA is packed into the chromosomes to avoid transcription and to fit in the nucleus.

The DNA molecule is the double strand of nucleotide sequence which is the blueprint for proteins production by cell.

It has millions of genes and its size is too long to fit i a discrete space, nucleus.

So DNA has to present in compact form to fit in such a small place.

And in the nucleus there are many enzymes for the DNA transcription. Transcription of DNA happens when there is need of proteins. Continues transcription can leads to cell anomalies.

Hence to control transcription DNA is present in packed chromatin.