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GE Basics
Locating Genetic Information

Timeline of GE

Recombinant DNA:
How Genes Are Transferred


Recombinant DNA: Example Using Insulin

How To Make Identical Genomes



 Locating Genetic Information

DNA (deoxyribonucleic acid )

Genes are composed of deoxyribonucleic acid, also known as DNA. The DNA molecule is made up of two chains of nucleotides. A nucleotide is made up of a one "base" chemical (adenine, thymine, guanine, and cytosine), a molecule of sugar and a molecule of phosphoric acid. (More on base pairs later.)

DNA looks like a twisted ladder. This structure is called a double helix. The arrangement of the nucleotide molecules gives DNA its helical shape. The sugar and phosphate molecules form the sides of the ladder. The base pairs are the ladder rungs (the part you step on).

Next, learn what base pairs are and how they work.


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Explore More: Genetic Engineering
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