Have atoms. And for Adenine and Thymine, there
Have you ever wonder why do man looks like a man, and an
animal looks like an animal? Each one of us have what is called the DNA
in every one of our cell. It is a genetic information that we get form our
parents, half from our father and half from our mother. Every time our
cells undergo division, this information is passed continuously to the new
cells and still behave like the original one.
DNA stands for deoxyribonucleic acid, a master molecule in every
cell. It is stored inside the nucleus and in the chromosomes and is
considered a perfect hiding place for biological information. DNA on the
other hand looks very complex. It holds two strands together but still
separate during the replication. But what do you think is the reason for
The DNA’s strands are held together via hydrogen bonding that is caused by the so-called
electrostatic interactions. This interactions has an indispensable function in DNA replication. The force
does not only keep the molecules in contact but also allows it structure to have strength.
Moreover, DNA by structure is a three-dimensional large macromolecule that forms the shape of
a double helix. The helix’s backbone is based from its alternating deoxyrobose and phosphate subunits.
Each of it in the deoxyribose is connected to base that extends between the two backbones.
Next, there are also named as the nucleotide bases. These are Adenine, Cytosine, Guanine, and
Thymine. These four bases has a sequence that identifies the genetic characteristics of the parent
organism. Its sequence is different from each strand but is always the same in the pairing between
bases. For instance is that A is paired to T, the same as to C is paired to G. The strands are arranged
close to one another not because it is bonded chemically, but because of the Electrostatic interactions
particularly the hydrogen bonds that hold these strands together.
Guanine and Cytosine have three events to which hydrogen atoms are attracted to nearby
nitrogen and oxygen atoms. And for Adenine and Thymine, there are only two hydrogen bonds. The
way these bases interfaces is though the so-called electrostatic force. It is wherein the electrons from
the oxygen and nitrogen atoms are negative, and are attracted to the exposed positive nuclei of the
nearby hydrogen atoms. The bonds are considered weak, but if you combine them, it would have greater
force to hold the DNA strands together.
Lastly, as the replication of the DNA takes place, the helicase will be attached and will break the
hydrogen bonds. And then, this will immediately separate the strands of the DNA. And when the
moves across the strands of the molecule, it will unceasingly split the hydrogen bonds and will separate
the two polynucleotide chains.