Final answer:
Glutamine is an uncharged polar amino acid, distinguished from negatively charged amino acids like aspartate and glutamate, and positively charged ones such as arginine, lysine, and histidine.
Step-by-step explanation:
Characteristics of Glutamine
Glutamine is an uncharged polar amino acid. While there are negatively charged amino acids such as aspartate and glutamate, and positively charged amino acids like arginine, lysine, and histidine, glutamine does not possess a charge on its side chain. It does, however, have a polar side chain, which makes it soluble in water and capable of forming hydrogen bonds. This attributes to its functional role in proteins where it can engage in various interactions due to its polarity.
According to the provided information, acidic amino acids like aspartate (Asp) and glutamate (Glu) contain negative charges, whereas basic amino acids contain a positive charge. Glutamine (Gln), however, is not listed under either of these categories, and its ability to participate in the synthesis of other amino acids also suggests its polar and uncharged nature.