AP Biology (Mader), 11th Edition

Chapter 5: Membrane Structure and Function

Post-Test

1
The plasma membrane is composed primarily of _____.
A)phospholipids
B)carbohydrates
C)waxes
D)nucleic acids
2
All of the following describe the tails of phospholipids EXCEPT:
A)nonpolar.
B)hydrophobic.
C)face the outside of the membrane.
D)made of fatty acids.
3
________ affects the fluidity of membranes.
A)Nucleotides
B)Proteins
C)Cholesterol
D)Glycolipids
4
Particular molecules or ions freely cross the plasma membrane with assistance from _____.
A)receptor proteins
B)cell recognition proteins
C)channel proteins
D)enzymatic proteins
5
A person's blood type is determined by the presence of particular _____ in the membranes of red blood cells.
A)phospholipids
B)glycoproteins
C)steroids
D)nucleic acids
6
All of the following molecules passively diffuse across the plasma membrane EXCEPT:
A)CO2.
B)alcohol.
C)amino acids.
D)O2.
7
Osmosis is the movement of _____ across a selectively permeable membrane.
A)sugars
B)amino acids
C)water
D)oxygen
8
If the inside of a cell is 1% NaCl, which solution is isotonic to the cell?
A)0.01% NaCl
B)0.1% NaCl
C)1% NaCl
D)10% NaCl
9
When a plant cell is placed in a hypertonic solution which of the following will occur?
A)The cell will swell and burst.
B)Nothing will occur.
C)The central vacuole will gain water.
D)Plasmolysis will occur.
10
The term hemolysis refers to ______.
A)normal red blood cells
B)red blood cells that burst after being placed in a hypotonic solution
C)shrinking of the cytoplasm, or crenation, after a cell is placed in a hypertonic solution
D)the loss of turgor pressure in a plant cell
11
Which of the following correctly describes facilitated transport?
A)It requires the expenditure of energy.
B)Molecules move from high concentration to low concentration.
C)Vacuoles form to move materials.
D)Molecules move from areas of low concentration into areas of high concentration.
12
Insulin leaves insulin-secreting cells by _____.
A)phagocytosis
B)receptor-mediated endocytosis
C)osmosis
D)exocytosis
13
The peptide hormone, follicle stimulating hormone (FSH), would activate its specific target cells by _____.
A)diffusing into the cells
B)binding a receptor protein in the plasma membranes
C)phagocytosis
14
Heart cells are able to contract in unison because of the flow of ions through _____.
A)gap junctions
B)tight junctions
C)adhesion junctions
15
People may get injections of _____, a component of the extracellular matrix of animal cells, to get rid of their wrinkles.
A)collagen
B)cholesterol
C)cellulose
D)chromatin
16
Which of the following statements about active transport is INCORRECT?
A)Carrier proteins are needed.
B)Sodium and potassium are actively transported across membranes.
C)Molecules move from areas of high concentration to areas of low concentration.
D)Active transport requires the expenditure of energy.
17
Macrophages are immune system cells that engulf bacteria by _____.
A)exocytosis
B)facilitated transport
C)phagocytosis
D)osmosis
18
The amount of phospholipid extracted from red blood cells led researchers to propose that ____.
A)the phospholipids form a single layer around the cell
B)the phospholipids form a bilayer around the cell
C)there are not enough phospholipids to create a membrane around the cell
19
According to the fluid-mosaic model, _____ are partially or wholly embedded in a fluid phospholipid bilayer.
A)nucleic acids
B)monosaccharides
C)proteins
D)triglycerides
20
Transplant rejections are the result of the immune system's response to foreign ______ and __________.
A)DNA; RNA
B)glycoproteins; glycolipids
C)plasma membranes; glycolipids
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