Question

In which part of the cell is DNA concentrated?

Answer 1

Hint: The cell organelle which is also called as the control center of the cell because its main function is to control all the cell activities.

Complete answer:
A eukaryotic cell contains several cell organelles. The nucleus is a membrane-bound organelle that contains most of the DNA in a cell and this DNA is called the chromosomal DNA. The cell nucleus contains all of the cell’s genome, except that of mitochondrial DNA. In prokaryotes, it occurs in nucleoid and plasmids.
Inside the nucleus, a large, dark-stained, and membrane-less structure is found which is called the nuclear bodies or the nucleolus. It forms around tandem repeats of rDNA, DNA coding for ribosomal (rRNA). These regions are called nucleolar organizer regions (NOR).
DNA (Deoxyribonucleic acid) is a double-helix structure that carries genetic information from the parents to the next generation. A molecule of DNA is made up of two chains of polypeptides that are coiled around each other. A DNA molecule is responsible for the development, growth, and reproduction of an organism. DNA and RNA are the two types of nucleic acids present in eukaryotes.
The genetic material which is DNA is generally present in the nucleus of the cell. These DNA molecules will together constitute several chromosomes, which is an organized form of DNA. The length of the DNA in each human cell is found to be around two meters. A small amount of DNA can also be found in the mitochondria and chloroplast. The genetic information is carried through genetic codes that are made up of four chemical bases present in the DNA.

Note: The term nucleus is derived from the Latin word nucleus, meaning seed. Antoine van Leeuwenhoek (1632-1723) observed a lumen, the nucleus, in the red blood cells of salmon. The nucleus is responsible for the replication of DNA in the cell cycle and in the controlling of the gene expression. It is the largest cell organelle found in the animal cell and was the first cell organelle to be discovered.