CIE IGCSE Biology Food Tests Questions and Answers

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CIE IGCSE Biology Food Tests Questions and Answers

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CIE IGCSE Biology Food Tests Questions and Answers

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CIE IGCSE Biology Food Tests
Questions and Answers
Concentration of DCPIP solution to add - ANSWER-1%

DCPIP solution is used for the testing of... - ANSWER-vitamin c

Drops of iodine solution to add - ANSWER-5-7 drops

Ethanol is used for the testing of... - ANSWER-lipids

First step of carrying out all food tests - ANSWER-Increase surface area of food
(chopping or grinding)

Iodine solution is used for the testing of... - ANSWER-starch

Negative result for Benedict's solution - ANSWER-blue

Negative result for Biuret reagent - ANSWER-blue

Negative result for Iodine solution - ANSWER-orange-brown

Negative result of DCPIP - ANSWER-solution remains blue

Negative result of Ethanol - ANSWER-clear (no colour)

Positive result for Benedict's solution - ANSWER-brick red (orange-red)

Positive result for Biuret reagent - ANSWER-violet (purple)

Positive result for Iodine solution - ANSWER-blue-black

Positive result of DCPIP - ANSWER-solution decolourises

Positive result of Ethanol - ANSWER-cloudy white emulsion

Ratio of food volume to Benedict's Solution volume (Reducing Sugars) - ANSWER-1
(cm^3) : 2 (cm^3)

Ratio of food volume to Biuret Reagent volume (Proteins) - ANSWER-1 (cm^3) : 2
(cm^3)

Ratio of food volume to ethanol volume (lipids) - ANSWER-1 (cm^3) : 2 (cm^3)

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Uploaded on: January 9, 2026
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Type: Exam (elaborations)
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