Question
Which is true about the pairing of bases in the DNA molecule?
a. purines always pair with pyrimidines
b. a single ring base pairs with another single ring base
c. a double ring base pairs with another double ring base
d. purines pair with purines and pyrimidines with pyrimidines
a. purines always pair with pyrimidines
b. a single ring base pairs with another single ring base
c. a double ring base pairs with another double ring base
d. purines pair with purines and pyrimidines with pyrimidines