Question

Active portions of chromosomes are found in light staining region of chromose called​

Answer 1

Answer:

Cells package their DNA not only to protect it, but also to regulate which genes are accessed and when. Cellular genes are therefore similar to valuable files stored in a file cabinet — but in this case, the cabinet's drawers are constantly opening and closing; various files are continually being located, pulled, and copied; and the original files are always returned to the correct location.

Of course, just as file drawers help conserve space in an office, DNA packaging helps conserve space in cells. Packaging is the reason why the approximately two meters of human DNA can fit into a cell that is only a few micrometers wide. But how, exactly, is DNA compacted to fit within eukaryotic and prokaryotic cells? And what mechanisms do cells use to access this highly compacted genetic material?

What Are Chromosomes?

Cellular DNA is never bare and unaccompanied by other proteins. Rather, it always forms a complex with various protein partners that help package it into such a tiny space. This DNA-protein complex is called chromatin, wherein the mass of protein and nucleic acid is nearly equal. Within cells, chromatin usually folds into characteristic formations called chromosomes. Each chromosome contains a single double-stranded piece of DNA along with the aforementioned packaging protei

Answer 2

Explanation:

A typical nucleosome contains 200 bp of DNA helix. Nucleosomes constitute the repeating unit of a structure in nucleus called chromatin. Chromatin is held over a scaffold of nan-histone chromosomal (or NI-K) proteins. At some places, chromatin is densely packed to form darkly stained heterochromatin. At other places, chromatin is loosely packed. it is called chromatin Chtornatin. It is transcriptionally active chromatin. Whereas heterochromatin is transcriptionally inactive and late, replicating or heteropycnotic.

So, the correct answer is 'A typical nucleosome contains 200 bp of DNA helix. Nucleosomes constitute the repeating unit of a structure in nucleus called chromatin. Chromatin is held over a scaffold of nan-histone chromosomal (or NI-K) proteins. At some places, chromatin is densely packed to form darkly stained heterochromatin. At other places, chromatin is loosely packed. it is called chromatin Chtornatin. It is transcriptionally active chromatin. Whereas heterochromatin is transcriptionally inactive and late, replicating or heteropycnotic'.

SO,THE CORRECT ANSWER IS STATEMENT