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Biology AQA 3.2.2 structure of DNA

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Unit 2 Biology, AQA, specification point 3.2.2, structure of DNA
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DNA NUCLEOTIDE

ap_36572-1__4cf17fe40e317 (image/jpg)

BASES; Adenine, Thymine, Guanine, cytosine

BASE PAIRINGSA&TG&C (remember the curve)

Hydrogen bonds link the bases together. These are very weak and can be easily broken

DOUBLE HELIX STRUCTURECaused by positive and negative bonds which causes the structure to twist (secondary structure of proteins)

A sugar-phosphate backbone is formed by the hydrogen bond between base pairings.

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