Final answer:
In biological molecules, DNA is a prime example where hydrogen bonds form between positively charged hydrogen atoms in one nucleotide chain and negatively charged oxygen or nitrogen atoms in the complementary chain. This bonding is crucial for maintaining the double helix structure of DNA and is also important in protein folding and stability.
Step-by-step explanation:
Hydrogen bonds are extremely important in biological molecules. One example of a biological/biochemical molecule that uses hydrogen bonding is DNA. The hydrogen bonds in this molecule occur as hydrogen atoms with a partial positive charge (+) from one nucleotide chain bond with oxygen or nitrogen atoms with a partial negative charge (-) from the complementary nucleotide chain, forming the characteristic double helix structure.
Additionally, in proteins, hydrogen bonds play a crucial role in stabilizing their three-dimensional structure, which is vital for their function. The hydrogen atoms in polar bonds within a protein can form bonds with other adjacent atoms, which helps the protein to properly fold and maintain its needed structure to carry out its biological roles.