The bases in DNA pair by chemical interactions. How are the base pairs formed differently between the pairs? A. Adenine and thymine form two hydrogen bonds, while cytosine and guanine form three hydrogen bonds.
B. Adenine and thymine form three hydrogen bonds, while cytosine and guanine form two hydrogen bonds.
C. Adenine and thymine form covalent bonds, while cytosine and guanine form hydrogen bonds.
D. Adenine and thymine form hydrogen bonds, while cytosine and guanine form covalent bonds.