Food Tests and Digestive System Quiz

Which test is used to detect the presence of sugars?

• Benedict's test

• Iodine test

• Sudan III test

• Biuret test

What color does a food sample turn if it contains starch when iodine solution is added?

• Red

• Yellow

• Blue-black

• Green

Which of the following is a reducing sugar?

• Sucrose

• Glucose

• Cellulose

• Starch

Which test is used to detect proteins?

• Iodine test

• Biuret test

• Sudan III test

• Benedict's test

What is the result of a positive Sudan III test for lipids?

• Red stain

• Yellow solution

• Blue-black color

• Green precipitate

Which solution is used in the emulsion test for lipids?

• Water

• Ethanol

• Benedict's solution

• Biuret solution

What is the purpose of the digestive system?

• To produce hormones

• To circulate blood

• To absorb oxygen

• To break down large molecules of food

What color change indicates a positive result for reducing sugars with Benedict's test?

• Blue to red-brown

• Yellow to blue-black

• Green to purple

• Red to green

Reorder the following to show Benedict's Reagent colours from least amount of sugar to most amount of sugar in the sample.

• 
• 
• 
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Match the following foods to the method used to test for them.

• Starch

• Iodine

• Lipids (fats)

• Benedicts

• Sugar (glucose)

• Biurets

• Protein

• Sudan III