The boxed portion of the following structure represents a
A) salt bridge.
B) hydrogen bond, with the hydrogen donated by the nitrogen.
C) hydrogen bond, with the hydrogen donated by the oxygen.
D) hydrophobic interaction.
E) hydrophilic interaction.

Question

The boxed portion of the following structure represents a 
A) salt bridge. 
B) hydrogen bond, with the hydrogen donated by the nitrogen. 
C) hydrogen bond, with the hydrogen donated by the oxygen. 
D) hydrophobic interaction. 
E) hydrophilic interaction.

Quizplus · Accepted Answer

The boxed portion of the structure shows a nitrogen atom donating a hydrogen bond to an oxygen atom. This is a common example of a hydrogen bond, where the hydrogen is donated by a nitrogen or a hydrogen atom and accepted by an electronegative atom like oxygen or nitrogen.

The Boxed Portion of the Following Structure Represents a