DNA is made up of repeating subunits called
DNA is made up of repeating subunits called nucleotides
DNA is made up of repeating subunits called nucleotides. A nucleotide consists of three components: a sugar molecule, a phosphate group, and a nitrogenous base. The sugar in DNA is deoxyribose, hence the name deoxyribonucleic acid. The phosphate group attaches to the sugar molecule, forming the backbone of the DNA strand.
There are four different types of nitrogenous bases found in DNA: adenine (A), thymine (T), guanine (G), and cytosine (C). The bases pair up in a specific manner, with adenine always pairing with thymine (A-T) and guanine always pairing with cytosine (G-C). This pairing is known as complementary base pairing.
The nucleotides are linked together through a chemical bond called a phosphodiester bond. The phosphate group of one nucleotide attaches to the sugar molecule of the adjacent nucleotide, forming a long chain. This chain of nucleotides forms the backbone of the DNA molecule.
The sequence of nucleotides along the DNA strand carries the genetic information. The order of the bases determines the genetic code that is used to create proteins and carry out various biological functions in an organism. This code is read by cellular machinery during processes such as transcription and translation.
Overall, the repeating subunits of nucleotides form the structure of DNA, and their sequence carries the genetic information that is essential for an organism’s development and function.
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