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DNA

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austin hallock

on 28 January 2013

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Transcript of DNA

The DNA structure The DNA structure is designed like a twisted ladder, other known as a double helix. DNA is broken up into little parts called Codons.
Codon is a sequence of three nucleotides that form a genetic code. An anticodon is also part of the sythesis because it makes sure that the proteins get all the amino acids they need, There are four main nucleotides that make up the DNA
structure. Guanine(G), thymine(T), adenine(A) and cytocine(C). A - T
G - C The phosphate and deoxyribose (sugar) help keep the DNA stable and together. The phosphate is also known as the back-bone. The four main nucleotides are also known as nitrogine bases. Each base is combined by a hydrogine bond. A-T G-C!!! A T A T G C Replication starts, this is when DNA copies itself. First the enzyme polymerase ("the ase") comes in and unzips the middle of the DNA Then DNA copies itself and both halfs have one old DNA strand and one new DNA strand. protien sythesis the first step to protien sythesis is transcription. A messanger RNA (MRNA) copies one half of the DNA and leaves the nucleus with the imformation and goes to the cytoplasm so it can tell the ribosome what amino acids it needs. Example DNA: TAC ACG GCC
MRNA: AUG UGC CGG
TRNA: UAC ACG GCC
Amino acid: methionine, cystieine, Arganine
transcription translation Next is Translation, Transfer RNA (TRNA) gets the right amino acids needed to make a protien, in this example it is methionine, cystieine and arganine. Lastly, the Amino acids form in a shape to make a protien. MRNA changes all adenines to uraciles, this is the RNA version of thymine... - See more at: http://teachertube.com/viewVideo.php?title=Protein_Synthesis_Animation&video_id=60707#sthash.zKdH1y4h.dpuf nucleus CELL
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