In the lock and key model of molecular structure, what term is used for the "key" molecule?

Question

Quizplus · Accepted Answer

The "key" molecule in the lock and key model of molecular structure is referred to as the antigen. This model is often used to describe how enzymes and substrates interact, where the enzyme is the "lock" and the substrate is the "key." However, in the context of immunology, the antigen can be seen as the "key" that fits into the "lock" of the antibody, initiating an immune response.

In the Lock and Key Model of Molecular Structure, What