HW 9 Transport Across the Cell Membrane Test with Answers Rated A
1. Which component in the figure plays an important role B
in cell-cell recognition?
2. The fluid mosaic model of the membrane proposed consist of protein mole-
that membranes cules embedded in a fluid
bilayer of phospholipids.
consist of a single layer of phospholipids and proteins.
consist of a phospholipid bilayer between two layers of
hydrophilic proteins.
consist of protein molecules embedded in a fluid bilay-
er of phospholipids.
consist of a phospholipid bilayer composed of a variety
of fatty acid
3. Which of the following are localized on the exterior of phosphate groups
a phospholipid bilayer?
phosphate groups
saturated fatty acids
cholesterol
unsaturated fatty acids
4. Which of the following statements about a typical plas- The two sides of the plas-
ma membrane is correct? ma membrane have ditter-
ent lipid and protein com-
Carbohydrates on the membrane surface are impor- position.
tant in determining the overall bilayer structure
1/9
, HW 9 Transport Across the Cell Membrane Test with Answers Rated A
.
The two sides of the plasma membrane have different
lipid and protein composition.
The hydrophilic interior of the membrane is composed
primarily of the fatty acid tails of the phospholipids.
The plasma membrane is a covalently linked network
of phospholipids and proteins that controls the move-
ment of solutes into and out of a cell.
Phospholipids are the primary component that deter-
mines which solutes can cross the plasma membrane.
5. Which component in the figure is a peripheral protein? D
6. Which component in the figure helps membranes re- E
sist changes in fluidity at high and low temperatures?
7. A primary function of cholesterol in the plasma mem- enable the membrane to
branes of some animals is to stay fluid more easily when
the temperature drops.
facilitate the removal of hydrogen atoms from saturat-
ed phospholipids
2/9
1. Which component in the figure plays an important role B
in cell-cell recognition?
2. The fluid mosaic model of the membrane proposed consist of protein mole-
that membranes cules embedded in a fluid
bilayer of phospholipids.
consist of a single layer of phospholipids and proteins.
consist of a phospholipid bilayer between two layers of
hydrophilic proteins.
consist of protein molecules embedded in a fluid bilay-
er of phospholipids.
consist of a phospholipid bilayer composed of a variety
of fatty acid
3. Which of the following are localized on the exterior of phosphate groups
a phospholipid bilayer?
phosphate groups
saturated fatty acids
cholesterol
unsaturated fatty acids
4. Which of the following statements about a typical plas- The two sides of the plas-
ma membrane is correct? ma membrane have ditter-
ent lipid and protein com-
Carbohydrates on the membrane surface are impor- position.
tant in determining the overall bilayer structure
1/9
, HW 9 Transport Across the Cell Membrane Test with Answers Rated A
.
The two sides of the plasma membrane have different
lipid and protein composition.
The hydrophilic interior of the membrane is composed
primarily of the fatty acid tails of the phospholipids.
The plasma membrane is a covalently linked network
of phospholipids and proteins that controls the move-
ment of solutes into and out of a cell.
Phospholipids are the primary component that deter-
mines which solutes can cross the plasma membrane.
5. Which component in the figure is a peripheral protein? D
6. Which component in the figure helps membranes re- E
sist changes in fluidity at high and low temperatures?
7. A primary function of cholesterol in the plasma mem- enable the membrane to
branes of some animals is to stay fluid more easily when
the temperature drops.
facilitate the removal of hydrogen atoms from saturat-
ed phospholipids
2/9
