Food Tests for Nutrients Quiz

What is the purpose of Benedict's solution in the carbohydrate test?

• To test for the presence of protein

• To test for the presence of reducing sugars

• To test for the presence of starch

• To test for the presence of fat

What color change indicates the presence of reducing sugars in the carbohydrate test using Benedict's solution?

• Purple

• Blue

• Black

• Green, yellow, orange, or red

What type of chemical bond is detected by the Biuret reagent in the protein test?

• Hydrogen bond

• Covalent bond

• Peptide bond

• Ionic bond

What color change indicates the presence of proteins in the Biuret reagent test?

• Green

• Purple

• Yellow

• Blue

What does the emulsion test detect in food?

• Carbohydrates

• Lipids or fats

• Proteins

• Vitamins

What is the appearance of a positive result in the emulsion test for lipids?

• Bubbly appearance

• Milky or cloudy appearance

• Clear appearance

• Yellowish appearance

What does the iodine solution test for in food?

• Protein

• Starch

• Vitamin C

• Fat

What color change indicates the presence of starch in the iodine solution test?

• Blue-black

• Yellow

• Red

• Green

What is the procedure for conducting the carbohydrate test using Benedict's solution?

• Add Benedict's solution to the sample and let it sit at room temperature

• Mix the sample with Benedict's solution and heat it in a water bath

• Mix the sample with Benedict's solution and freeze it

• Heat the sample in a microwave without adding Benedict's solution

What are the steps for conducting the protein test using Biuret reagent?

• Mix the sample with Biuret reagent and observe the color change.

• Add the sample to a test tube and heat it over a Bunsen burner

• Mix the sample with iodine solution and observe the color change

• Shake the sample vigorously and observe the fizzing