howens5703
howens5703
14-01-2020
Biology
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Explain why a dna molecule is called a zipper
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kimberlymoran292
kimberlymoran292
14-01-2020
DNA is made up of two poly-nucleotide chains, and it forms a helix because hydrogen bonds form between the two chains. During replication an enzyme "Helicase" travels down the the DNA and splits the chain and it forms 2 separate strands.
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