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Intermolecular forces of attraction are often important in holding large molecul

ID: 1024592 • Letter: I

Question

Intermolecular forces of attraction are often important in holding large molecules together. For example, some proteins fold into compact shapes, held together by attractive forces between nearby functional groups. A schematic of a folded protein is shown below, with the protein backbone indicated by a blue-green ribbon, and various appendages drawn dangling from the chain. What type of intermolecular force occurs at site B? dipole-dipole interactions van der Waals forces ion-ion interactions hydrogen bonding

Explanation / Answer

Answer: Hydrogen bonding

Explanation: A hydrogen bond is the attractive force between the hydrogen attached to an electronegative atom of one molecule and an electronegative atom of a different molecule. Usually the electronegative atom is oxygen, nitrogen, or fluorine, which has a partial negative charge.

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