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DNA Double Helix Video Analysis

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A DNA double helix is formed when the nitrogenous base is from two single strands joined together using the complimentary base pairing rule. In this ruled guanine pairs with cytosine and adenine with thymine and they join with hydrogen bonds, the G and the C have 3 hydrogen bonds between them while the A and the T have two. The DNA double helix is formed when a nucleotide joins with another nucleotide forming first of all a single strand and we demonstrated this in an earlier video those nucleotides are joined by covalent bonds but these single strands attached to another single strand as the nitrogenous base pairs are paired using the complimentary base pairing rule. The two strands are called antiparallel, the two strands will twist around

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