{"id":9890,"date":"2022-08-19T13:16:43","date_gmt":"2022-08-19T10:16:43","guid":{"rendered":"https:\/\/starlanguageblog.com\/?p=9890"},"modified":"2022-08-19T13:16:43","modified_gmt":"2022-08-19T10:16:43","slug":"do-prokaryotes-have-circular-dna","status":"publish","type":"post","link":"https:\/\/www.starlanguageblog.com\/do-prokaryotes-have-circular-dna\/","title":{"rendered":"Do Prokaryotes Have Circular DNA?"},"content":{"rendered":"
Recent research has revealed that some prokaryotes may have as many as four linear or circular chromosomes, in contrast to the majority of prokaryotes, such as E. coli, which have a single circular DNA molecule that makes up their whole genome. For instance, the cholera-causing bacteria Vibrio cholerae has two circular chromosomes.<\/p>\n
What is circular DNA, and does it exist in prokaryotes? We know that eukaryotic cells have multiple linear chromosomes, but do prokaryotes have circular DNA? In this article, we will learn about circular DNA and plasmids. We will also discuss rotaxanes and catenanes. This article will answer both questions and more.<\/span><\/p>\n Chromosomes are DNA molecules that contain tens of thousands of base pairs. Eukaryotic cells contain large, linear chromosomes, while prokaryotic cells contain smaller circular ones. Some cells contain multiple types of chromosomes, including chloroplasts and mitochondria. Here are some common types of chromosomes<\/a> found in cells. If you’re unsure which type your cell has, look at these examples.<\/span><\/p>\n The eukaryotic cell has many pairs of linear chromosomes, and each pair has its unique form. In interphase, eukaryotic chromosomes become less compact, allowing transcription to occur. This looser structure is known as chromatin, and it has important implications for the expression of genes. Chromosomes are composed of hundreds of thousands of base pairs and are about 10,000 times shorter than taut without proteins.<\/span><\/p>\n <\/p>\n Bacteria and eukaryotic cells have multiple linear lines, and their circular chromosomes are scattered throughout their taxonomic groups. Interestingly, linear chromosomes are thought to have evolved due to large-scale lateral gene transfer. In the case of bacteria, mitochondrial genes were transferred to the developing nuclear genome and spliced into the circular chromosome, which created multiple copies of the host chromosome. Parasite jumping genes also played a crucial role in this evolution.<\/span><\/p>\n The molecular architecture of rotaxanes is composed of a dumbbell-shaped molecule threaded through a ring-like macrocycle. Rotaxane is derived from the Latin for “wheel” and “axle.” Rotaxanes are trapped molecules because their ends are more significant than the internal diameter of the ring. Thus, unthreading the rotaxane would require considerable distortion of covalent bonds.<\/span><\/p>\nEukaryotic cells have multiple linear chromosomes.<\/span><\/h2>\n
Rotaxanes<\/span><\/h2>\n