Importance and Chemical structure of Nucleic acids

Nucleic acids

They are biological macromolecules ( polymers ) made up of many smaller molecules ( monomers ) called nucleotides , Nucleic acids are composed of hydrogen , oxygen , nitrogen , carbon and phosphorus atoms .

Molecular structure of nucleic acids

Nucleic acids are made up of building units which are the nucleotides that bind together by covalent bounds to form the polynucleotide ( the nucleic acid ).

The nucleotide

The nucleotide is the basic building unit of the nucleic acid , It  consists of three units which are a pentose sugar molecule , a phosphate group and a nitrogenous base, A pentose sugar molecule contains five carbon atoms, A phosphate group is connected to the carbon atom no.5  of the sugar molecule.

A nitrogenous base is connected to the carbon atom no.1 of the sugar molecule, There are five types of nitrogenous bases, which are Adenine ( A), Guanine ( G), Uracil ( U ), Cytosine ( C ) and Thymine ( T), Uracil is found in RNA only instead of thymine in DNA , Nucleic acids differ according to the difference of the type of sugar and nitrogenous bases forming them .

Nucleic acids

Nucleic acids

Classification of Nucleic acids

There are two types of nucleic acids , which are Deoxyribonucleic acid (DNA ) , Ribonucleic acid ( RNA ) .

Deoxyribonucleic acid (DNA )

The type of pentose sugar in the nucleotide is Deoxyribose sugar ( which lacks an oxygen atom than ribose sugar ), Nitrogenous bases are Adenine ( A ) , Guanine ( G ) , Thymine ( T ) and Cytosine ( C ), Number of strands in each molecule is two strands of nucleotides .

Location: Inside the nucleus of the cell where it is involved in the structure of chromosomes .

Deoxyribonucleic acid (DNA ) importance

It carries the genetic information passing from a generation to another when the cells divide and these information are responsible for appearing the distinctive characteristics of the living organisms and organizing all vital activities of the cells .

Ribonucleic acid ( RNA )

The type of pentose sugar in the nucleotide is Ribose sugar, Nitrogenous bases are Adenine ( A ) , Guanine ( G ) , Uracil ( U ) and Cytosine ( C ), Number of strands in each molecule is single strand of nucleotides, It is transcribed ( formed ) from the nucleic acid DNA inside the cell nucleus then transferred into the cytoplasm surrounding the nucleus .

Ribonucleic acid ( RNA ) importance

Building ( synthesizing ) proteins which the cell needs, These proteins are responsible for appearing the genetic traits and organizing the vital activities .

Bio computer

It was possible to use deoxyribonucleic acid ( DNA ) in making Biochips that can be used to make the computers much faster than the current devices that rely on silicon chips , Also , their storage capacity will be million greater than the current devices .

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