NURSING ANM AND GNM

Detailed explanation-1: -Prokaryotic cells may have only one chromosome, but that one chromosome is a very long DNA molecule that must be condensed to fit inside a tiny space. In a eukaryotic cell, DNA wraps around clusters of histone proteins. However, most prokaryotic cells don’t use histones to help with DNA storage.

Detailed explanation-2: -Whereas eukaryotes wrap their DNA around proteins called histones to help package the DNA into smaller spaces, most prokaryotes do not have histones (with the exception of those species in the domain Archaea). Thus, one way prokaryotes compress their DNA into smaller spaces is through supercoiling (Figure 1).

Detailed explanation-3: -Except for members of the Archaea domain, prokaryotes do not have histones. Histones are found mostly in eukaryotes. Chromosomes contain a specific kind of protein. Histones are proteins that attach to DNA, form chromosomes, and regulate gene activity.

Detailed explanation-4: -Chromosome and plasmids Most prokaryotes have a single circular chromosome, and thus a single copy of their genetic material. Eukaryotes like humans, in contrast, tend to have multiple rod-shaped chromosomes and two copies of their genetic material (on homologous chromosomes).

Detailed explanation-5: -Prokaryotic cells, such as bacteria, have a free-floating chromosome that is usually circular and is not enclosed in a nuclear membrane. Instead, the DNA simply exists in a region of the cell called the nucleoid.