Please answer all of these questions Label the structures in the membrane above

Question

Please answer all of these questions

Label the structures in the membrane above marked by letters. The top of the page is outside the cell while below the membrane is inside the cell. Which types of organisms use a cell membrane on their cells? Why are the phospholipids arranged like they are in the cell membrane? Why is the membrane described as "fluid"? What is the probable function of part G? What is the purpose of cholesterol in the cell membrane? What types of molecules would be able to pass through the membrane freely and what types of molecules would need special help?

Explanation / Answer

A1: polar group such as phosphate

A2: fatty acid chain

B: glycophospholipid, phospholipid attached to carbohydrate.

C: protein attached to carbohydrate

D: carbohydrate molecule

E: cholesterol

F: perepheral protein

G: tramembrane protein

H: extracellular leaflet of plasma membrane

I: intracellular leaflet of plasma membrane

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