PLASMA MEMBRANE TRANSPORT

The fluidity of cell membrane of an animal cell is determined by the proportion of

• protein

• cholesterol

• glycolipid

• glycoprotein

Water passes quickly through cell membrane because

• the bilayer is hydrophilic

• it is a small, charged molecule

• it moves through hydrophobic channels

• it moves through aquaporins

Select molecules that can be found in plasma membranes.

• Protein

• Steroid

• Phospholipid

• Triglyceride

Ions can pass through cell membrane using

• Leak channels

• Gated channels

• Phospholipid bilayer

• Carrier protein

A human blood cell with 1% solute is placed in salt water with 5% solute.

The cell ​is​ ​__________ to the solution.

• hypotonic

• hypertonic

• isotonic

Lipid-soluble molecules such as alcohols cannot diffuse through the plasma membrane.

• True

• False

Carrier proteins within plasma membrane transport any molecules.

• True

• False

Identify the type of membrane transport that is involved in transporting proteins into cell.

• Diffusion

• Osmosis

• Exocytosis

• Endocytosis

Which of the following is not a function of membrane protein?

• Receptor protein

• Transport protein

• Vesicles formation

• Cell to cell recognition

The solutions in the arms of a U-tube are separated at the bottom of the tube by a selectively permeable membrane. The membrane is permeable to sodium chloride but not to glucose. Side A is filled with a solution of 0.4 M glucose and 0.5 M NaCl, and side B is filled with a solution containing 0.8 M glucose and 0.4 M NaCl. Initially, the volume in both arms is the same.

After several days, you should find the solution level of side A has ______________.

• increased

• decreased

• same