<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:
cant you just ask your teacher?
but other wise i might be able to help but not in this kind of way just plz leave a comment if you have something to say before deleting this answer
<span>A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.</span>
I’m guessing the answer is AX (the first one) sorry if I am wrong tho
