8.2 Enzymes

  Life could not exist without enzymes.

• True

• False

Catalysts are chemicals that ………………………chemical reactions.

• speed up

• slow down

• do nothing to the

Biological catalysts made from protein.

• Enzymes

• Vitamins.

• Viruses.

Biological catalysts mean catalysts made by .......................

• living things.

• non-living things

We can’t see the molecules in food but we can use chemicals to detect them.

• True

• False

Iodine turns …………………….when it mixes with starch.

• dark blue.

• green.

• pink.

If warm saliva is added to starch and left for a few minutes, …………………..colour forms with iodine.

• no blue.

  only a brown yellow colour of the iodine

• a blue.

• green

Each of the enzymes in your gut can only make ………………of molecule break down.

• one type

• two types

• more than two types

Amylase is an enzyme found in ………….

• saliva.

• stomach.

• pancreas

Protease is an enzyme found in ………….

• saliva.

• stomach.

• pancreas