True or False? Proteins are amphoteric.

Proteins are indeed amphoteric, which means they can act as both acids and bases depending on the surrounding environment. This property arises from the presence of various functional groups in amino acids, the building blocks of proteins.

In an acidic environment, the carboxyl group (-COOH) of the amino acids can donate a proton (H+), allowing the protein to function as an acid. Conversely, in a basic environment, the amino group (-NH2) can accept a proton, enabling the protein to act as a base. This dual capability is crucial for many biochemical processes and helps proteins maintain their function across varying pH levels in biological systems.

The term "amphoteric" reflects the versatility of proteins and their ability to stabilize pH levels in cells by neutralizing excess acids or bases. This functional flexibility is integral to many physiological processes, including enzyme activity and metabolic regulation.