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Ch. 10 - DNA Structure and Analysis
All textbooksKlug 12th EditionCh. 10 - DNA Structure and AnalysisProblem 14
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Chapter 10, Problem 14

Describe the various characteristics of the Watson–Crick double-helix model for DNA.

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Hi, everyone. Here we have a question asking which of the following features of the Watson Crick model for DNA is incorrect. So we have a two long polynucleotide chains are curled around the central axis. This is correct. B the two chains are anti parallel. This is correct. C, the nitrogenous bases of opposite chains are paired as a result of the formation of covalent bonds. This is incorrect. It is hydrogen bonds and lastly D and DNA, A always pairs with T and G always pairs with C. This is correct and it's called complementarity and it results from the chemical affinity that produces the hydrogen bonds in each pair of bases. So D is correct. So our answer here is C, the nitrogenous bases of opposite chains are paired as a result of formation of covalent bonds. Thank you for watching. Bye.
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