In the lock-and-key model of molecular structure, what term is used for the "key" molecule?
A)Antigen
B)Anticodon
C)Antibody
D)Antibiotic

Question

Quizplus · Accepted Answer

The "key" molecule in the lock-and-key model of molecular structure is referred to as an antigen. This model is often used to describe how enzymes (the lock) bind to specific substrates (the key), but in the context of immunology, the antigen is the substance that binds specifically to an antibody or a T-cell receptor.

In the Lock-And-Key Model of Molecular Structure, What Term Is