Which of the following correctly lists the levels of compaction in eukaryotes from naked DNA to the most compact?
A) nucleosome, looped chromatin (300- nm fiber), metaphase chromosome, solenoid
B) nucleosome, solenoid, looped chromatin (300- nm fiber), metaphase chromosome
C) metaphase chromosome, nucleosome, solenoid, looped chromatin (300- nm fiber)
D) solenoid, metaphase chromosome, nucleosome, looped chromatin (300- nm fiber)
E) solenoid, nucleosome, looped chromatin (300- nm fiber), metaphase chromosome

Question

Which of the following correctly lists the levels of compaction in eukaryotes from naked DNA to the most compact?
A) nucleosome, looped chromatin (300- nm fiber), metaphase chromosome, solenoid
B) nucleosome, solenoid, looped chromatin (300- nm fiber), metaphase chromosome
C) metaphase chromosome, nucleosome, solenoid, looped chromatin (300- nm fiber)
D) solenoid, metaphase chromosome, nucleosome, looped chromatin (300- nm fiber)
E) solenoid, nucleosome, looped chromatin (300- nm fiber), metaphase chromosome

Quizplus · Accepted Answer

The correct order of DNA compaction in eukaryotes starts with the nucleosome, which is the basic unit of DNA packaging, consisting of DNA wrapped around histone proteins. This is followed by the formation of a solenoid structure, where nucleosomes are coiled further. The next level of compaction involves the formation of looped chromatin or the 300-nm fiber, where the solenoid structure is organized into loops. The most compact form is the metaphase chromosome, which is formed during cell division when the chromatin is condensed to its highest degree to facilitate segregation.

Which of the Following Correctly Lists the Levels of Compaction