.png?fm=jpg "Sudan IV Test for Lipids")
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About This Simulation
Have you ever wondered what fat is? Discover the structure of lipids and how you can test for the presence of lipids in food samples.
Learning Objectives
- Recognize the structure of triglycerides and the features of saturated, unsaturated, and trans fats.
- Test for the presence of lipids in food samples.
- Identify the reaction which changes unsaturated fats into saturated fats.
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About This Simulation
Lab Techniques
- Sudan IV Test
Related Standards
- No direct alignment
- Biology Unit 1.3
- Biology Unit 1.5
- Biology Unit 1.4
- Biology Unit 1
- Biology 2.1 Molecules to metabolism.
- Chemistry B.3 Lipids
- Biology D.1 Human Nutrition
Learn More About This Simulation
This short, targeted simulation is adapted from the full-length “Introduction to Food Macromolecules” simulation.
Discover the lipids in your food! In this simulation, you will be introduced to the chemical structures of lipids and the importance of lipids within our diets. Begin by examining the unique structure of triglycerides and identifying the features of saturated, unsaturated and trans fats. Then learn how to test for the presence of lipids in food samples using the Sudan IV test.
Jump into your food samples
Begin by jumping inside a block of butter to initiate an animation that explains the chemical building blocks that make up lipids. Discover the molecules which make up fats: glycerol and fatty acids. Observe the esterification reaction between glycerol and fatty acids which forms a triglyceride. Learn the structural differences between saturated, unsaturated, and trans fats. Understand why fats are a solid and oils are a liquid at room temperature with the help of molecular structures. Finally, return to the lab to perform an experiment.
Use the Sudan IV test
You will assay food samples using the Sudan IV test for lipids. A range of food samples have been prepared and their respective solution placed in a test tube. Perform the experiment for each food sample and observe the color change over time. Identify the positive and negative result for the test. Use what you have learnt to determine which food samples contain lipids. Does your friend's salad contain lipids?
Review your knowledge
Put your knowledge of lipids to the test in quizzes throughout the simulation. Do you know how to change an unsaturated fat into a saturated fat?
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FAQs
Find answers to frequently asked questions.
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