What characteristics shared by all enzymes hormones and antibodies is that their function is determined by the?

The function of enzymes, hormones, and antibodies is determined by their specific three-dimensional structures, which are shaped by the sequence and arrangement of their amino acids. This unique conformation allows them to interact with specific target molecules or receptors, facilitating biochemical reactions, signaling processes, or immune responses. Additionally, their functionality can be influenced by environmental factors such as pH and temperature, which can affect their stability and activity.