Enzymes and How They Work

Ever wondered how your body breaks down that sandwich you had for lunch? Enzymes are special protein molecules that act like molecular scissors, speeding up chemical reactions by breaking large food molecules into smaller, usable pieces.

The secret to how enzymes work lies in their active site - a perfectly shaped groove on the enzyme's surface. Think of it like a lock that only fits one specific key. The substrate (the molecule being broken down) fits perfectly into this active site, just like a key sliding into a lock.

Once the substrate locks into the active site, the enzyme breaks it down into products - smaller molecules your body can actually use. This clever system is called the Lock and Key Theory because substrates must fit perfectly to be broken down.

Quick Tip: Remember that enzymes are reusable - after breaking down one substrate, they're ready to work on the next one!

Three key enzymes you need to know:

• Amylase breaks starch into glucose (helps digest carbs)
• Protease breaks proteins into amino acids (helps digest meat and beans)
• Lipase breaks lipids into glycerol and fatty acids (helps digest fats and oils)