This is how I spend my time. Making DNA models out of pasta! I'm going to have my classes do this next week during our DNA unit. I came across this activity on the internet and I think it has the potential to be good in a high school class. Particularly, I like how it shows the three parts of DNA, a phosphate (ziti), a sugar (pinwheel), and a base (pipe cleaner). The different colors are the four different bases (A, T, C, G). This model is weak in the area about teaching why A goes with T and C goes with G. So, I am addressing that on a different day where they will analyze the percentages of A, T, C, and G in different organisms DNA. It is also weak in how it models the bonds. The bases are really boded by hydrogen bonds which are actually more like a magentic attraction rather than a sturdy, covalent bond. However, my students have not had chemistry yet so this detail would be lost on them.... Hopefully it goes well. I am doing this with them next Friday.
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