LS1 - Lesson 3 - Nutrition & Food Lab

Front

What is the purpose of using indicators in a food lab?

Back

Indicators are substances that change color in the presence of specific nutrients, allowing us to identify the type of nutrient present in a food sample.

Front

What color change indicates the presence of fat when using Sudan indicator?

Back

A bright, deep red color change indicates the presence of fat when using Sudan indicator.

Front

What color does iodine turn in the presence of starch?

Back

Iodine turns black in the presence of starch.

Front

What is the Biuret test used for?

Back

The Biuret test is used to detect the presence of proteins in a food sample, indicated by a purple color change.

Front

What color change occurs with Benedict's solution in the presence of reducing sugars?

Back

Benedict's solution changes to orange in the presence of reducing sugars.

Front

Can a single food item contain more than one type of nutrient?

Back

Yes, a single food item can contain more than one type of nutrient, such as proteins, sugars, and fats.

Front

What is the significance of the color orange when using Benedict's solution?

Back

The orange color indicates the presence of reducing sugars in the food sample.

Front

What is the expected result when testing a food sample that contains protein using the Biuret test?

Back

The expected result is a purple color change, indicating the presence of protein.

Front

What is the role of iodine in nutrient testing?

Back

Iodine is used to test for the presence of starch in food samples.

Front

What does a bright red color indicate when testing with Sudan indicator?

Back

A bright red color indicates the presence of fat in the food sample.