Biology 2nd Edition by Robert Brooker, Eric Widmaier ,Linda Graham ,Peter Stiling

Exercise 9

Hydrogen bonds differ from covalent bonds in that
A) covalent bonds can form between any type of atom, and hydrogen bonds form only between H and O.
B) covalent bonds involve sharing of electrons, and hydrogen bonds involve the complete transfer of electrons.
C) covalent bonds result from equal sharing of electrons, but hydrogen bonds involve unequal sharing of electrons.
D) covalent bonds involve sharing of electrons between atoms, but hydrogen bonds are the result of weak attractions between a hydrogen atom of a polar molecule and an electronegative atom of another polar molecule.
E) covalent bonds are weak bonds that break easily, but hydrogen bonds are strong links between atoms that are not easily broken.