________ Bonds are Responsible for the Chemical Affinity Between a and T

Question

________ bonds are responsible for the chemical affinity between A and T (or G and C)nucleotides.
A) Ionic
B) Covalent
C) Hydrogen
D) Electro-ionic
E) None of the choices are correct.

Accepted Answer

Hydrogen bonds are responsible for the formation of base pairs between A and T (two hydrogen bonds) or G and C (three hydrogen bonds). Ionic and electro-ionic bonds involve the transfer of electrons between atoms, while covalent bonds involve the sharing of electrons between atoms. None of these types of bonds are responsible for the specific pairing of nucleotides in DNA.