Exploring Lipid Macromolecule Testing

The video tutorial demonstrates a simple experiment to test for the presence of lipids in Cheetos using a paper bag as an indicator. Water is used as a control to show a negative result, where the paper bag remains clear. When Cheetos are tested, grease spots appear on the paper bag, indicating a positive result for lipids. The experiment highlights the use of a paper bag as an effective indicator for detecting lipids.

What material is used as the indicator for lipids in this experiment?

• Plastic bag

• Metal sheet

• Paper bag

• Glass slide

What is used as the control in this lipid detection experiment?

• Oil

• Water

• Juice

• Milk

What should the paper bag look like if the water test is negative for lipids?

• It will be clear

• It will have grease marks

• It will have dark spots

• It will change color

What is observed on the paper bag when water is applied and evaporates?

• The paper bag tears

• The paper bag remains clear

• Grease marks appear

• Dark spots appear

What indicates a positive test for lipids when testing with Cheetos?

• The paper bag changes color

• Dark spots or grease spots appear

• The paper bag remains clear

• The paper bag tears

What is the expected result on the paper bag if Cheetos contain lipids?

• No change

• Dark spots or grease spots

• The paper bag becomes wet

• The paper bag tears

What does a clear paper bag indicate in this experiment?

• Presence of proteins

• Absence of lipids

• Absence of proteins

• Presence of lipids

What macromolecule is being tested for in this experiment?

• Proteins

• Lipids

• Carbohydrates

• Nucleic acids

What does a positive test for lipids show on the paper bag?

• Torn paper bag

• Wet paper bag

• Clear paper bag

• Grease marks or dark spots