Lipids Quiz
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5 questions, one answer each
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1. How many fatty acids are in a phospholipid?
- A. One
- B. Two
- C. Three
- D. Four
2. Which feature identifies an unsaturated fatty acid?
- A. A carboxyl group
- B. A C=C double bond in the R group
- C. A phosphate group
- D. An ester bond
3. What is the correct positive result of the emulsion test?
- A. Blue to brick-red
- B. Orange-brown to blue-black
- C. Blue to purple
- D. A cloudy white emulsion
4. Why do phospholipids form a bilayer in water?
- A. Both ends are hydrophobic
- B. The phosphate heads are hydrophilic and the tails are hydrophobic
- C. They are soluble in water
- D. They have three fatty acids
5. How many water molecules are released when one glycerol and three fatty acids form a triglyceride?
- A. 1
- B. 2
- C. 4
- D. 3