Which of the following factors does not affect membrane permeability?

Which of the following factors would tend to increase membrane fluidity?

a. A greater proportion of unsaturated phospholipids

b. A greater proportion of saturated phospholipids

c. A lower temperature

d. A relatively high protein content in the membrane

Which best describes the structure of a cell membrane?

a. Proteins between two bilayers of phospholipids

b. Proteins embedded in a bilayer of phospholipids

c. A bilayer of protein coating a layer of phospholipids

d. Cholesterol embedded in a bilayer of phospholipids

Which of the following is one of the major components of the plasma membrane of a plant cell?

a. Phospholipids

b. Cellulose fibers

c. Collagen fibers

d. Pectins