Y9 Food Tests

Which reagent is needed to test for proteins

• biuret solution

• iodine solution

• starch solution

• ethanol

What reagent tests for reducing sugars?

• sugar solution

• Biuret solution

• Glucose solution

• Benedict's solution

What is the colour change for a positive test for proteins?

• blue to milky

• blue to brick red

• blue to lilac

• blue to colourless

What colour is iodine solution to start with?

• orange brown

• blue

• blue black

• brick red

Which food group does the 'emulsion test' test for?

• proteins

• fats/lipids

• Vitamin C

• reducing sugars

DCPIP tests for which food group?

• vitamin C

• fats

• reducing sugars

• proteins

If Benedict's solution turns yellow/green, how much reducing sugar does the food contain?

• lots of reducing sugars

• trace amounts

• none at all

• Too many

Which food group do glucose and starch belong to?

• fats

• Vitamins

• proteins

• carbohydrates

What colour change happens with a positive test with iodine solution?

• blue to lilac

• blue black to orange brown

• orange/brown to blue black

• blue to milky white

What colour does DCPIP turn in the presence of Vitamin C?

• colourless

• clear

• blue

• brick red