Question

Which of the following statements about hydrogen bonds is true?

1) They can occur between most polar molecules.
2) They are weak attractive interactions.
3) They can be found between the two strands of a DNA molecule.
4) All of these statements are correct

Answer 1

All the provided statements about hydrogen bonds are true: they occur between polar molecules, are weak but significant when numerous, and stabilize the DNA double helix.

Step-by-step explanation:

The correct statement about hydrogen bonds is that all of the provided statements are true. Hydrogen bonds can indeed occur between most polar molecules because of the attraction between the positively charged hydrogen atom in one molecule and the negatively charged electronegative atom, such as oxygen or nitrogen, in another molecule. They are considered weak attractive interactions, which can be easily broken, but when present in large numbers—such as between water molecules—they provide significant cumulative strength. Hydrogen bonds are also critical in biology, as they are found between the two strands of a DNA molecule, maintaining its double helix structure and thus play an essential role in biological functions.