These bases are of two different types of molecules purines

These bases are of two different types of molecules: purines and pyrimidines. Purines have _____ ring(s) in their structure, and pyrimidines have ____ ring(s) in their structure. The two bases that are purines are ______ and)______ These bases are comprised of_______ rings. The two bases that are pyrimidines______ and______. These bases are comprised of ______ rings. Based on this information, scientist could predict that the base _____ pairs with _____ and the base ______ pairs with _____ in the formation of the DNA molecule. This is called complementary base pairs. Thus one strand of DNA is complementary to the other strand (opposite/matching). The bases are paired by ______ bonds along the axis of the molecule.

Solution

5. Purine have two carbon-nitrogen rings in their structure and pyrimidine have single carbon-nitrogen ring

6.Two bases that are purines are adenine and guanine, and these bases comprise two carbon-nitrogen rings i.e. one pyrimidine ring fused to an imidazole ring.

7. pyrimidines are Thymine, cytosine, uracil and these bases comprise single carbon-nitrogen ring and two nitrogen atoms rings. these are also called as diazines; they are six-membered heterocyclic ring structures

8. Base Adenine pairs with thymine and base guanine pairs with Cytosine in a DNA molecule