Provided that there's no diagram, most molecules have particular areas on the molecules, called the "active area" that act as a lock to a particular substrate's molecular structure, providing the key.
An enzyme's active area is only able to be "unlocked" by a certain substrate's "key".
Answer:
That would be option D. A motor.
Explanation:
It has been linked to lung cancer.
hope this helps!
Answser
it migth be B i am not sure
Answer:
Natural selection leads to evolution.
