Question

Describe the fluid- mosaic model of membrane structure. Define all the components and explain why the liquid crystal consistency is important. TT T Arial - 3(120) T E . . 25 Pathep Words QUESTION 5 Why can't larger polar molecules and ions diffuse through the plasma membrane? Explain. Would it be advantageous to the cell if they could? Explain.
both questions please

Answer 1

And 1-) fluid mosais model of membrane structure describe the structure of cell membrane or Padma membrane. The membrane of cell is flexible and hence can be moved sideways like liquid. The cell membrane consist of protein lipid and cholesterol. cholesterol provides fluidity to cell membrane along with proteins are embedded in two layers of phospholipids protein allows certain molecules to enter or exists the cell. Some proteins are integrated in bilayer to provide active transportation of larger molecules.

Liquid crystal consistency is important because

It helps protein molecule to move around the membrane

Ans2-) as the plasma membrane is selectively permeable to only those polar molecules which are smaller in size and can easily diffuse in lipid bilayer.