<span>The answer is the first option. Enzyme and substrate bind using a lock-and-key mechanism. Enzymes act on a specific substrate and a substrate needs a specific enzyme, this is what is called a lock-and-key mechanism. Enzymes and substtates are like a key and a lock, one is for each other.</span>
Answer:
B
Explanation:
Acid rain
damaging a marble statue or anything else
is a physical change. <3
Because the older cells will not be able to function properly without the new cells taking over them. :)
