Structure of DNA
DNa stands for Deoxyribonucleic acid is hereditary material that carries genetic instruction in all living organism.
Contain genetic code of organism.
DNA are double stranded (double helix).
DNA molecules consist of two strands that wind around one another to form a shape known as double helix.
Structure of DNA
Sugar phosphate backbone
Base pair
Thymine
Adenine
Nitrogenous base
Guanine
Cytosine
DNA codes genetic information for transmission of inherited traits.
Most DNA located in the cell nucleus (nuclear DNA), but a small amount of DNA found in mitochondria (mitochondrial DNA).
Information in DNA is stored as a code made up of four chemical bases;
Adenine (A)
Guanine (G)
Cytosine (C)
Thymin (T)
DNA bases pair up with each other;
A with T, and C with G, to form units called base pair.
Each base is also attached to sugar molecules and phosphate molecules.
Together base, sugar, phosphate called nucleotide.
Nucleotides are arrange in two long strands that form a spiral called double helix.
Important property of DNA is that it can replicate or make copies of itself.
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