Questions
Choose the correct statement about DNA packaging from the following.
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
detailed solution
Correct option is A
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.Talk to our academic expert!
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Histone proteins are:
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