The role of the cell membrane is most like the job of which person?

According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly

a. Spread in a continuous layer over the inner and outer surfaces of the membrane.

b. Confined to the hydrophobic interior of the membrane.

c. Embedded in a lipid bilayer.

d. Randomly oriented in the membrane, with no fixed inside-outside polarity.

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