BIOL 1103 : Movement Across Membranes - Movement of Sugar Molecules - Biology Assignment Help

Assignment Task :

Part 1 – Movement Across Membranes

1. Selective permeability or semipermeability is a property of cellular membranes. 

   1. What is a semipermeable membrane? 

   2. State one example of a molecule commonly found in a cell that is able to freely diffuse across a semipermeable membrane. 

   3. State one example of a molecule commonly found in a cell that is not able to freely diffuse across a semipermeable membrane. 

2. The image in Figure 1 is of two sugar solutions of different concentration designated solution A and solution B separated by a semipermeable membrane. 

   1. Which side, A or B, has the solution with the highest concentration? Explain. 

   2. Which side, A or B, has the highest water potential? Explain.  

   3. In which direction will the net movement of water molecules occur (i.e., A to B, or B to A)? Explain.  

   4. In which direction will the net movement of sugar molecules occur (i.e., A to B, or B to A)? Explain.

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