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Test: DNA Structure

QuestionAnswer
Name the four bases. 1. Guanine 2. Cytosine 3. Adenine 4. Thymine
Name the bases that pair together. Guanine (G) and Cytosine (C) Adenine (A) and Thymine (T)
Name the two Pyrimidines and Purines and state the differences between both groups. Pyrimidines: Cytosine (C) and Thymine (T) Purines: Guanine (G) and Adenine (A) Pyrimidines are single-ringed and Purines are double-ringed.
How can you look at DNA and differentiate Adenine from the different bases? Adenine forms two Hydrogen bonds with Thymine and it is a purine so it is also double-ringed.
Why do purines always have to pair with pyrimidines? Because there is not enough room in the double helix for two purines (since they are double-ringed) and there is too much room for two pyrimidines (since they are single-ringed).
Created by: ttown101222
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