List three mediator proteins that move phospholipid molecules from one side of a membrane to the other. Why arethese proteins required?

Describe the difference between integral and peripheralproteins in the plasma membrane

The antifungal drug nystatin kills fungal cells in partthrough the formation of membrane pores that cause K+leakage. To what class of membrane-inserting molecule doesnystatin belong?

What is the difference between smooth and rough endoplasmic reticulum?

Explain the main types of transmembrane movements. Which molecules can be transported through each and under what circumstances?  Which mechanisms require energy?

What important ion channel is present in the membrane of a lysosome? What is the function of the ion channel? If enzymes from a lysosome leaked out into the cytosol, what would happen?

The fluid mosaic model of membrane structure has been very useful in explaining membrane behavior. However, the description of membrane as proteins floating in a phospholipid sea is oversimplified. Describe some components of membrane that are restricted in their lateral motion.

The cytoplasm of a certain cell is composed of a solution that is 98% water, 2% solutes. Consider the solution shown in the beaker in this picture: FOOE OOS Foor solution. [Select] Cytoplasm is 98% water, 2% solutes. The solution in the beaker would be considered when compared to [Select] The plasma membrane is impermeable to solutes. Beaker solution is 98% water, 2% solutes the cell. We would expect that the cell would [Select] if it was placed in the would account for whatever changes might occur to the volume of the cytoplasm of the cell when it is placed in the solution.

How does the arrangement of phospholipid molecules in the cell membrane give the membrane selective permeability?

What materials can easily diffuse through the lipid bilayer, and why? What is receptor-mediated endocytosis said to be more selective than phagocytosis or pinocytosis? What do osmosis, diffusion, filtration, and the movement of ions away from like charges all have in common? In what do they differ?