Hydrogen bonds are important for all of the following except

A) producing surface tension in water.
B) helping hold a protein structure together.
C) helping hold DNA strands together.
D) helping atoms give up or receive electrons.

Hydrogen bonds are important for creating surface tension in water, stabilizing protein structures, and holding DNA strands together through interactions between nucleotide bases. However, they do not involve the transfer or sharing of electrons, which is characteristic of ionic and covalent bonds, respectively. Hydrogen bonds are a type of weak electrostatic attraction between molecules, not involved in electron transfer.