How dose lock-and-key mechanism relate to hormones?

A. If a hormone fits the receptor site, then there is no reaction. If a hormone and a receptor site do not match, then there will be an effect.

B. If a hormone fits the receptor site, then there will be an effect. If a hormone and a receptor site do not match, then there is no reaction.

C. No effect will occur regardless of weather the hormone does or does not fit the receptor site

D. None of the above

http://blog.udemy.com/lock-and-key-hypothesis/

so whats the answer then

It's B.

Trust me. I did the test and got it right.

The correct answer is B. If a hormone fits the receptor site, then there will be an effect. If a hormone and a receptor site do not match, then there is no reaction.

The lock-and-key mechanism is a concept used to explain the interaction between hormones and their respective receptor sites. It suggests that the shape of a hormone molecule (the key) must precisely fit the shape of the receptor site (the lock) in order for the hormone to bind to the receptor and produce a biological effect.

In this context, if a hormone and a receptor site have compatible shapes and fit together like a key in a lock, the hormone can bind to the receptor and trigger a cascade of cellular events that ultimately leads to a physiological response. On the other hand, if the hormone and receptor site do not match, they cannot bind to each other, and there will be no reaction or response.

Therefore, option B accurately represents the relationship between the lock-and-key mechanism and hormones.