9-1 Food tests

Which of the following is used to test for the presence of starch?

• Benedicts reagent

• Biurets reagent

• Iodine solution

• Sudan III solution

A change to which colour indicates the presence of starch?

• Orange

• Brick red

• Lilac

• Blue/Black

The image shows a positive test for which food group?

• Protein

• Reducing sugars

• Vitamin C

• Lipids

The test for protein requires the use of which reagent?

The image shows a positive test for which of the following?

• Fatty acids

• Reducing sugars

• Glycerol

• DNA

What colour is Benedict's solution?

• Black

• Lilac

• Blue

• Brown

How does the test for reducing sugars using Benedict's solution differ to other food tests?

• There is no colour change involved

• The sample must be placed in a fridge

• The sample is heated

• It gives an exact quantity of the concentration of sugar

Identify the major food type found in the image

The image shows a positive test for which food type?

• Fats

• Complex carbohydrates

• Amino acids

• Simple sugars

Which other test can be used to test for fats?