Question

The levels of DNA packaging are depicted in which of the following sequences?

(A) alpha satellite DNA, heterochromatin, centromere, euchromatin, metaphase chromosome
(B) constitutive heterochromatin, euchromatin, facultative heterochromatin, metaphase chromosome
(C) purines, pyrimidines, phosphates, nucleosome, 30 nm chromatin fiber, metaphase chromosome
(D) double helix DNA, nucleosome, 30 nm chromatin fiber, extended chromatin, metaphase chromosome
(E) double helix DNA, histones, nucleosomes, extended chromatin, metaphase chromosome

Answer 1

The levels of DNA packaging are depicted in sequence (E) double helix DNA, histones, nucleosomes, extended chromatin, metaphase chromosome.

Step-by-step explanation:

The levels of DNA packaging are depicted in sequence (E) double helix DNA, histones, nucleosomes, extended chromatin, metaphase chromosome.

During DNA packaging, DNA-binding proteins called histones form nucleosomes by wrapping the DNA around them. Histones are rich in basic amino acids and form an octamer. These nucleosomes are further compacted into extended chromatin, which is the middle level of packaging. Finally, at the metaphase stage, the chromosomes are formed, and they are the most compact form of DNA packaging.