Cell membrane structure Quiz
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5 questions, one answer each
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1. Which part of a phospholipid is hydrophobic?
- A. The phosphate head
- B. The carbohydrate chain
- C. The whole molecule
- D. The fatty acid tails
2. What is a glycolipid?
- A. A lipid with a carbohydrate chain attached
- B. A protein with a lipid attached
- C. A phospholipid with cholesterol
- D. A channel protein
3. Cholesterol in a membrane...
- A. makes the membrane more fluid by moving phospholipids
- B. restricts the movement of other molecules
- C. forms channels for ions
- D. is only found inside the cell
4. Beetroot is heated to 70 °C and the water becomes deep red. Which explanation is correct?
- A. Phospholipids have been digested
- B. The pigment has been produced by respiration
- C. Water has been taken into the cells
- D. Proteins are denatured and the bilayer is disrupted, so pigment leaks out
5. Why is the fluid-mosaic model called a mosaic?
- A. The membrane is very thin
- B. All the phospholipids are different
- C. Proteins of various sizes and shapes are scattered in the bilayer
- D. The membrane has several layers