CORE practical Flashcards
What reagent is used to test for reducing sugars?
Benedict’s solution.
What color indicates a positive test for starch?
Blue-black.
Which test is used to detect proteins in food?
Biuret test.
What is the function of the control test in food testing?
To ensure the accuracy and reliability of the test results.
What is the main carbohydrate tested in food tests?
Starch.
What type of food sample would you use for the lipid test?
Oils or fatty foods.
Nov2021 1B
Add iodine. The color turns blue-black if starch is present.
What is the positive result for the iodine test?
Blue-black coloration.
What does a positive Biuret test indicate?
The presence of proteins.
What is the significance of using distilled water in food tests?
To avoid contamination and ensure accurate results.
What does a color change in Benedict’s test signify?
The presence of reducing sugars.
Fill in the blank: In the lipid test, if lipids are absent, the paper remains _______.
clear.
2021 1B June Q8(c)
Add biuret. The color turns purple if protein is present.
