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Question: question 1 cell and membrane transport structure amp function part...

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Question 1: Cell and membrane transport: structure & function

Part A

 

A structural diagram of the eukaryotic plasma membrane is shown below.


 

      i.         In the above diagram, on which side of the membrane is the cytoplasm (side A or side B)? Please state one reason why you chose this answer. (2 marks)

 

    ii.         In the above diagram, which letter (A, B, C, D, E, F, or G) represents the hydrophobic region of the membrane? (1 mark)

 

   iii.         Which structure (C, D, E, F or G) is involved in the transport of Sodium-ions across the plasma membrane? (1 mark)
 

   iv.         Which structure (C, D, E, F or G) in the above diagram is a transmembrane protein? The transmembrane region of this protein will consist mostly of which type of amino acids and please explain why this is so? (3 marks)

     v.         The plasma membrane consists of many different types of molecules. One of these molecules is not a polymer but contains four aromatic hydrocarbon rings. What is the name of this molecule?  Give two reasons for the importance of this molecule within the plasma membrane. (3 marks)

 

 

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