Lipids

• What are the two types of lipids?

  Triglycerides and phospholipids.
• Name three functions of lipids in organisms

  Energy storage, Insulation, Hormones, Cell membrane structure,
• What is the test for lipids called?

  The emulsion test.
• What reagent is used in the test for lipids?

  Ethanol and water.
• What indicates a positive result in the lipid test?

  A milky white emulsion forms on top of the ethanol/water.
• What does a more milky/opaque precipitate suggest in the lipid test?

  It suggests that more lipids are present.
• Is the lipid test qualitative or quantitative?

  Qualitative.
• Describe the test for lipids.

  1. Add ethanol and shake to dissolve
  2. Add distilled water
  3. Positive result: White emulsion