DNA Packaging — Prelims Questions

Which of the following statements about nucleosomes is INCORRECT?

The 'beads-on-string' structure in chromatin is observed at which level of DNA packaging?

Which of the following is a characteristic feature of heterochromatin?

The total length of DNA in a typical human diploid cell is approximately $2.2$ meters. If the diameter of the nucleus is about $10,mu\text{m}$, what is the approximate compaction ratio achieved by DNA packaging?

Which enzyme is primarily responsible for introducing and relieving supercoils in prokaryotic DNA?

Arrange the following levels of DNA packaging in eukaryotes from the least condensed to the most condensed form: I. 30 nm chromatin fiber II. DNA double helix III. Metaphase chromosome IV. Nucleosome V. Looped domains