IMAT Structure and function of the cell membrane questions

Sample questions

1. 1IMAT Doutor

   What is the role of cholesterol in the plasma membrane of an animal cell?
   1. AIt forms the main structural layer of the membrane, in place of the phospholipids
   2. BIt makes the membrane freely permeable to ions by creating gaps between the phospholipids
   3. CIt buffers fluidity, restraining movement at high temperature and preventing tight packing at low temperature
   4. DIt anchors ribosomes to the cytoplasmic face of the membrane, so that proteins are inserted into the bilayer as they are made
   5. EIt carries the sugar chains of the glycocalyx and takes part in cell-to-cell recognition
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2. 2IMAT 2026 Q15

   Which main components make up the plasma membrane?
   1. ALipids and glycogen
   2. BFatty acids and sugars
   3. CRNA and amino acids
   4. DPhospholipids and proteins
   5. ECarbohydrates and DNA
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