Enzymes: A quick Guide
Enzymes:
Enzymes make the _______________ in our body happen at a faster rate.
A chemical that speeds up a reaction is called a __________________
Enzymes are often called _______________________________
Breakers and Builders:
Enzymes come in two main types
1. _______________- these break down large molecules into _______________ ones. This is important in
digestion.
2. ______________- these join small molecules together to make______________ ones. These build
important molecules inside our cells.
How an enzyme works:
Enzymes work on substances called ________________________________
An enzyme in action: The substrate fits into the ________________________________of the enzyme.
The enzyme breaks the substrate down into smaller molecules called _____________________________.
Common Enzymes
Enzyme
Substrate
Product(s)
Important Properties:
Enzymes have 5 important properties
1. ___________________________________________________________________________________
2. ___________________________________________________________________________________
3. ___________________________________________________________________________________
4. ___________________________________________________________________________________
5. ___________________________________________________________________________________
→Enzymes are ______________________________________
This means that they only work with ______________________ particular substrate. _________________
other substrate can fit into the ___________________of the enzyme.
→Enzymes are affected by _________________
Warm an Enzyme and they work _______. But if they get too hot they stop ________.
There is an ___________________ where they work best.
Enzymes are made of ________________. At high temperatures, the protein will breakdown. The shape of
the _________________changes, so the substrate can no longer fit. We say that the enzyme has been
_______________ It no longer works.
→Enzymes are affected by __________________________
Change the pH and the shape of the _______________will change. Every enzyme has an optimum
_______which it works best.
Here are five statements about enzymes. For each one decide if it is true or false.
____1. They can be used again and again
____2. Enzymes are carbohydrates
____3. Each enzyme can react with lots of
different substrates.
____4. Enzymes are not affected by
temperature.
____5. They are affected by pH
Fill in the Blank
1. The area on an enzyme where the reaction takes place. __________________
2. When the enzyme has stopped working due to extreme heat. __________________
3. A biological catalyst made of protein.__________________
4. Chemicals made by enzymes.__________________
5. Chemicals that the enzymes work on.__________________