Which amino acid pair is known for containing amide groups?

The correct choice highlights Glutamine and Asparagine as the amino acid pair that contains amide groups within their structures.

Both Glutamine and Asparagine have a characteristic amide functional group, which is formed by the condensation of an amine and a carboxylic acid. Specifically, in these amino acids, the side chains contain a carboxamide structure.

In Glutamine, the side chain has an amide group attached to a carbon, contributing to its properties and functionality in biological systems, including protein synthesis and metabolic pathways. Asparagine features a similar amide group, albeit with one less methylene (-CH2-) in its side chain compared to Glutamine.

This property makes Glutamine and Asparagine significantly important in biological processes, especially in protein interactions and enzyme activities where amide bonds play a role in stabilizing structures and participating in hydrogen bonding.