Cell Transport Quiz
1. The part of the cell that regulates what enters and leaves the cell is the:
a.
nucleus
b.
cytoplasm
c.
nuclear envelope
d.
cell membrane
2. Which process transports molecules across a membrane by means of a carrier protein?
a.
facilitated diffusion
b.
simple diffusion
c.
osmosis
d.
phagocytosis
3. Two salt solutions of different concentrations are present on either side of a semipermeable membrane. One side of the membrane contains a 25% salt solution, the
other side of the membrane contains a 10% salt solution. Which way will the water
molecules move in the solutions?
a.
From the 25% solution to the 10% solution
b.
From the 10% solution to the 25% solution
c.
There would be no movement of water molecules.
d.
Water will move in both directions
4. All of the following terms describe or are true concerning the cell membrane except:
a.
it is mostly composed of polysaccharides
b.
it has a hydrophobic middle
c.
it has proteins embedded in it
d.
it is selectively permeable
e.
all cells are surrounded by a cell membrane
5. If a cell loses the ability to make energy, but is still alive, which of the following
transport mechanisms will continue to function?
a.
osmosis
b.
facilitated diffusion
c.
active transport
d.
a&b
6. Which type of transport requires energy from the cell in order to work?
a. endocytosis
b. phagocytosis
c. exocytosis
d. all of the above
7. If body cells with a 5% salt solution inside of them are exposed to salt water with a 9
% solution for 30 minutes, what do you predict will occur?
a. the cells will burst
c. nothing
b. the cells will shrink
d.the cells will reach equilibrium
8. Cell membranes consists of which of the following?
a. a phopholipid bi-layer
b. a lipid bi-layer
c. proteins
d. chemical markers
e. both a and c
f. a, c, and d
9. Water from solutions of different concentrations moves across a membrane as the
result of
a. osmosis
b. equilibrium
c. active transport
d. Exocytosis
10. The term that includes all others is
a. endocytosis
b. phagocytosis
c. active transport
d. pinocytosis
11.
The diagram below represents the fluid mosaic model of a cell membrane.
Which type of molecule is indicated by the arrow?
A. carbohydrate
B. protein
C. nucleotide
D. phospholipid
12.
The interior or middle portion of a cell membrane forms a hydrophobic region that
A. allows water-soluble molecules to pass through it.
B. allows food such as sugar to pass through it.
C. makes it difficult for water-soluble molecules to pass through it.
D. makes it difficult for fat-soluble molecules to pass through it.
13. If a liver cell needs to stockpile a concentrated supply of glucose inside of its cell
and must take it from the surrounding blood supply, what kind of activity would occur in
that situation?
A. diffusion
C.
active transport
B. osmosis
D.
passive transport
14.
How many phospholipid layers are there in a cell membrane?
A. one
C. three
B. two
D. four
15.
Which of the following are sometimes found on marker proteins?
A. nucleotides
C. nucleic acids
B. carbohydrates side chain
D. saturated fats
16.
Which type of molecule has a hard time passing through the cell membrane?
A. fats
C. water
B. ionic compounds D. very small