This is refering to enzymes and the way they work. When you have an enzyme, it works as a "lock" and you put the "key" in it. The "lock" is the active site in the enzyme. The "key" is the substrate. You then get an enzyme-substrate complex and then you get a product. If you know about enzymes, you should be fine getting your head around this. Hope this helps :)
The lock and key method (as opposed to the induced fit method) is where the enzyme's active site is a specific shape, of which it will only be able to form the enzyme-substrate complex with a specific substrate.
The Lock or The Enzyme has a specific active site (site of which reaction takes place) so only the Key or Substrate will only fit that "lock".
This is refering to enzymes and the way they work. When you have an enzyme, it works as a "lock" and you put the "key" in it. The "lock" is the active site in the enzyme. The "key" is the substrate. You then get an enzyme-substrate complex and then you get a product. If you know about enzymes, you should be fine getting your head around this. Hope this helps :)
The lock and key method (as opposed to the induced fit method) is where the enzyme's active site is a specific shape, of which it will only be able to form the enzyme-substrate complex with a specific substrate.
The Lock or The Enzyme has a specific active site (site of which reaction takes place) so only the Key or Substrate will only fit that "lock".
Try this page as well http://revisionworld.com/gcse-revision/biology/cell-activity/proteins-and-amino-acids/enzymes