Exploring Digestive Enzymes and Tests

Which enzyme breaks down starch into simpler sugars in the mouth?

• Protease

• Amylase

• Lipase

• Lactase

What is the positive result for the starch test using iodine solution?

• Blue-black colour

• Brick red colour

• Cloudy white emulsion

• Purple colour

Which enzyme is responsible for breaking down proteins into amino acids?

• Lipase

• Amylase

• Protease

• Maltase

What is the name of the test used to detect glucose in a food sample?

• Biuret test

• Benedict’s test

• Iodine test

• Emulsion test

Which enzyme breaks down fats into fatty acids and glycerol?

• Amylase

• Protease

• Lipase

• Maltase

What colour does Benedict’s solution turn if glucose is present after heating?

• Blue

• Purple

• Brick red

• Green

Which food test uses copper sulphate and sodium hydroxide to detect proteins?

• Benedict’s test

• Iodine test

• Biuret test

• Emulsion test

What is the positive result for the Biuret test for proteins?

• Blue-black colour

• Purple colour

• Brick red colour

• Cloudy white emulsion

Which of the following is NOT a product of lipid digestion?

• Fatty acids

• Glycerol

• Amino acids

• None of the above

What is the positive result for the emulsion test for lipids?

• Blue-black colour

• Brick red colour

• Cloudy white emulsion

• Purple colour