Choose the correct statement about DNA packaging from the following.

Easy

A

The beads-on-string structure in chromatin is packaged to form chromatin fibers that are further coiled and condensed during metaphase.
B

A typical nucleosome contains 300 bp of DNA helix.
C

Histones are rich in the basic amino acid residues glycine and arginine, both of which carry a positive charge.
D

In a typical nucleus, the region of chromatin which stains light is referred to as heterochromatin

Solution

Chromatin with nucleosomes is further packed to organise into chromosomes during metaphase. Histone proteins have more arginine and lysine amino acids. Nucleosome has a length of DNA with 200bp. Lightly stained region of chromatin is called euchromatin.

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