Chapter 4:
The Cell and Its Environment
Practice Test
1.
Cells in a fish's gills pump out salt even though the salt water the fish lives in has a greater concentration of salts than the cells themselves do. What process do these cells use to remove the salt?
a.
osmosis
b.
diffusion
c.
active transport
d.
facilitated diffusion
Hint
2.
Which of these transport mechanisms requires an input of energy from a cell?
a.
diffusion
b.
active transport
c.
facilitated diffusion
d.
osmosis
Hint
3.
In phagocytosis and pinocytosis, the plasma membrane brings in materials by forming a _________ .
a.
lamella
b.
vesicle
c.
cell wall
d.
transport protein
Hint
4.
How does a particle, such as an ion, that is too large to squeeze through the plasma membrane, get into the cell?
a.
by osmosis
b.
by passive transport
c.
by facilitated diffusion
d.
by active transport
Hint
5.
What is the outer boundary of a cell that encloses the cell's content?
a.
the vesicle
b.
the cell wall
c.
the plasma membrane
d.
the nuclear membrane
Hint
6.
Solid chunks of material are taken into the cell by __________ .
a.
phagocytosis
b.
exocytosis
c.
active transport
d.
pinocytosis
Hint
7.
Why are lipids and lipid-soluble particles able to cross the plasma membrane by diffusion?
a.
because they use channel proteins
b.
because they are very small particles
c.
because they use carrier proteins
d.
because they dissolve in the lipid bilayer
Hint
8.
What is a membrane protein that help particles penetrate the plasma membrane?
a.
transport protein
b.
pectin
c.
phospholipid
d.
vesicle
Hint
9.
What is the diffusion of water into and out of cells?
a.
plasma movement
b.
osmosis
c.
passive transport
d.
active transport
Hint
10.
Which of these is NOT a function of the cell wall in plants and algae?
a.
allowing water, ions, and other materials to pass through
b.
determining what materials can pass through the plasma membrane
c.
protection
d.
support
Hint
