Antibodies

Catalysts

Energy stores

Hormones

Toxins

Structural components

Breaking down large molecules into small molecules

Building large molecules from small molecules

Changing one molecule into another

Making molecules disappear

Causing molecules to diffuse across a partially permeable membrane

Makes absorption of small soluble particles easier

Neutralises hydrochloric acid in the stomach and makes the conditions alkaline

Emulsifies drops of fat into smaller droplets, increasing surface area for enzyme action

Carries protease enzymes for digestion of protein

They run at lower temperatures so use less energy to heat the water

They can cause allergic reactions in some people

They can digest protein-based fabrics such as wool

They contain proteases which are effective in removing stains such as blood and sweat

Can be used at low temperatures

Can be used at normal pressure

Can be used in the absence of water

Money needed to control temperature and pH

Cannot be used in metal containers

Expensive to produce enzymes