DNA Model
- DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. The 4 types of nitrogen bases are adenine, thymine, guanine and cytosine. The order of the bases determines the DNA’s instructions. The two strands that make up each DNA are antiparallel to each other, which allows the complimentary base pairing.
- This structure shows the antiparallel strands, which is accurate to the structure of DNA, to improve the accuracy of this model we could make it longer, and show more of the individual nucleotides (Phosphate and sugar groups)
DNA Replication
- DNA is replicated during mitosis of a cell
- The 3 steps of replication in DNA are: unzipping, which occurs when the DNA double helix unwinds and the 2 strands of DNA separate through the breaking of hydrogen bonds in the bases. Then, complimentary base pairing, new nucleotides move to pair with the bases of each separate DNA strand. Finally, adjacent nucleotides bond, sugar phosphate bonds form between the nucleotides of the new strand to complete the molecule.
- When completing this activity we showed the phosphate bonds and the nucleotides joining at the same time, which is inaccurate to the process. However, it showed the unzipping and the creation of the template strands well.
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