8A.4 Digestive Enzymes

Select the correct definition of a enzyme.

• A protein which slows down reactions.

• A protein which speeds up reactions.

• A protein which blocks reactions.

• A protein which delays reactions.

Write down ONE place in the body where digestive enzymes are made (make sure you spell it correctly!)

(a)  

Select the enzyme which breaks down protein.

• Protease

• Lipase

• Carbohydrase

• Amylase

Select the enzyme which breaks down lipids (fats).

• Protease

• Lipase

• Carbohydrase

• Amylase

Select the enzyme which breaks down carbohydrates.

• Protease

• Lipase

• Carbohydrase

• Amylase

Select the enzyme which breaks down starch.

• Protease

• Lipase

• Carbohydrase

• Amylase

Suggest why enzymes can't work at high temperatures.

• They melt.

• They feel hot.

• They are destroyed.

• They migrate.

How do enzymes help digestion?

• They break large molecules into smaller ones.

• They join small molecules together.

• They pull molecules together.

• They eat large molecules.

Select a disadvantage of using enzymes to wash our clothes.

• We can wash clothes at a lower temperature.

• We can save money.

• We are more likely to break down stains.

• Some people may have an allergic reaction.

Write down the missing word.

Enzymes speed up reactions because they reduce the amount of (a)   we need for a reaction.