How is your DNA composed?

DNA is the abbreviation of deoxyribonucleic acid which has as its main function to store the genetic information of an individual. In other words, all the genetic information about you is contained in your DNA.

source: Microscope Master

This figure above illustrates the location of the DNA. The chromosome is the condensed DNA associated with proteins, found within the nucleus which is an organelle located within a cell. But, we can also find DNA in other organelles like mitochondria and chloroplasts.

So what’s the composition of the DNA?

DNA is composed of a set of compounds called nucleic acids. Chemically, a nucleic acid is formed by a pentose, a nitrogenous base and a phosphate group. In the DNA pentose is deoxyribose and the nitrogenous bases are four: adenine, thymine, cytosine and guanine. That is, DNA has four types of nucleic acids.

Source: Bioninja

Nitrogenous bases are grouped into purines adenine and guanine and pyrimidine cytosine and guanine.

Source: libretexts
Source: libretexts

When a permanent change in the composition of your DNA occurs it causes the mutation that can change a feature in you, which can become hereditary if this mutation reaches your sex cells.

This was a summary on the composition of your DNA. I recommend that you also study the structure of DNA.

Good studies!



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