Chapter 4:
The Cell and Its Environment
Practice Test
1.
How does a cell take in large liquid droplets?
a.
by osmosis
b.
by exocytosis
c.
by pinocytosis
d.
by phagocytosis
Hint
2.
Solid chunks of material are taken into the cell by __________ .
a.
pinocytosis
b.
active transport
c.
exocytosis
d.
phagocytosis
Hint
3.
Which of these statements is NOT part of the cell theory?
a.
All cells are produced from other cells.
b.
All cells live in a fluid environment.
c.
The cell is the basic unit of structure and function in organisms.
d.
All organisms are composed of one or more cells or cell fragments.
Hint
4.
Which of these transport mechanisms requires an input of energy from a cell?
a.
diffusion
b.
osmosis
c.
facilitated diffusion
d.
active transport
Hint
5.
Why are lipids and lipid-soluble particles able to cross the plasma membrane by diffusion?
a.
because they are very small particles
b.
because they use channel proteins
c.
because they dissolve in the lipid bilayer
d.
because they use carrier proteins
Hint
6.
What is the plasma membrane made up of?
a.
two layers of carbohydrates
b.
a lipid bilayer
c.
a protein bilayer
d.
three layers of fats
Hint
7.
What is the diffusion of water into and out of cells?
a.
plasma movement
b.
active transport
c.
passive transport
d.
osmosis
Hint
8.
What is the random movement of ions and other particles?
a.
diffusion
b.
dynamic equilibrium
c.
transportation
d.
activation energy
Hint
9.
What is the outer boundary of a cell that encloses the cell's content?
a.
the plasma membrane
b.
the nuclear membrane
c.
the vesicle
d.
the cell wall
Hint
10.
Diffusion and osmosis are processes in which particles move randomly across the plasma membrane. What type of movement are diffusion and osmosis?
a.
passive transport
b.
exocytosis
c.
active transport
d.
endocytosis
Hint
