What+is+DNA?

__What is DNA?__ The purposes of DNA: - DNA holds the instructions for your genes, so they basically tell your genes what to do. - They make proteins - Every living thing contains DNA - DNA is found in our body cells and in the cells of the foods (organisms) that we eat

DNA structure: - Double Helix -The base pairs make up the “rungs” of the DNA ladder - The bases are Adenine (A), Thymine (T), Guanine (G) and, Cytosine (C) - A pairs with T and G pairs with C - Between the bases hydrogen bonds connect them - Between every thing else is covelent bonds - The sides of the DNA structure continuiusly alternate deoxyribose and phosphate groups along the entire length of the molecule this makes up the backbone of DNA media type="youtube" key="qy8dk5iS1f0" height="315" width="420"

DNA replication: -Before replication can begin the enzyme Helicase “unzips” or “unwinds” the double helix - Each of the single strands then serve as a template for a new DNA structure to be assembled - DNA polymerse then reads the DNA information and sends in the correct base to pair with the base. (A with T and C with G) - Once all the bases are paired up two identical DNA strands of the parent strand are created

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