Which of the following is a extrachromosomal DNA?
Extrachromosomal DNA (eDNA) is mammalian cells is represented not only as mitochondrial DNA but also as circular DNA existing both in the nucleus and in the cytoplasm.
What are DNA chromosomes called?
This DNA-protein complex is called chromatin, wherein the mass of protein and nucleic acid is nearly equal. Within cells, chromatin usually folds into characteristic formations called chromosomes. Each chromosome contains a single double-stranded piece of DNA along with the aforementioned packaging proteins.
What is called the extrachromosomal genetic material?
plasmid. an extrachromosomal genetic element of DNA or RNA that is capable of replicating independently of the host chromosome. Plasmids are generally circular molecules, although some linear plasmids have been found.
What is extra nuclear DNA?
Extrachromosomal DNA is any DNA that is found outside of the nucleus of a cell. It is also referred to as extranuclear DNA or cytoplasmic DNA. Most DNA in an individual genome is found in chromosomes. Extrachromosomal DNA is often used in research of replication because it is easy to identify and isolate.
Where can extrachromosomal DNA be found in eukaryotes?
Extrachromosomal DNA in eukaryotes includes the chromosomes found within organelles of prokaryotic origin (mitochondria and chloroplasts) that evolved by endosymbiosis. Some viruses may also maintain themselves extrachromosomally.
What is it called when chromosomes align?
During metaphase, the cell’s chromosomes align themselves in the middle of the cell through a type of cellular “tug of war.” The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids. …
What is it called when chromosomes appear?
prophase. a cell division begins, the chromatin threads coil and shorten so that visible bar like bodies (chromosomes) appear.
What is meant by a karyotype?
Karyotyping is a test to examine chromosomes in a sample of cells. This test can help identify genetic problems as the cause of a disorder or disease.