Chapter 8:
Cellular Transport and the Cell Cycle
Practice Test
1.
Cancer may be considered a mistake in __________.
a.
the control of mitosis
b.
the cell cycle
d.
all of the above
Hint
2.
During which phase of mitosis are the chromosomes moving to the middle of the cell?
a.
anaphase
b.
metaphase
c.
telophase
d.
prophase
Hint
3.
When the concentration of solutes outside the cell is greater than the solutes inside the cell, the solution is said to be __________.
a.
isotonic
b.
hypotonic
c.
in equilibrium
d.
hypertonic
Hint
4.
In mitosis, the two double copies of the DNA attached to the spindle fibers are known as __________.
a.
nucleoli
b.
centrioles
c.
centromeres
d.
chromatids
Hint
5.
During anaphase, which of the following occurs?
a.
the chromatin coils
b.
the nucleolus disintegrates
c.
the nuclear membrane has begun to reform
d.
the chromatid pairs separate
Hint
6.
If a cell has 20 chromosomes, how many chromosomes will be present in the daughter cells?
a.
30
b.
10
c.
20
d.
5
Hint
7.
What is the surface area-to-volume ratio of a cube-shaped cell 2 mm on a side?
a.
2:01
b.
6:01
c.
1:01
d.
3:01
Hint
8.
Paramecia that live in fresh water often contain _________ to rid their cells of excess water.
a.
mitochondria
b.
contractile vacuoles
c.
urinary ducts
d.
multiple nuclei
Hint
9.
Very large molecules can enter a cell through __________.
a.
diffusion
b.
endocytosis
c.
exocytosis
d.
osmosis
Hint
10.
During prophase, which of the following describes the chromosomes?
a.
The chromatin is in strands that are long and thin.
b.
The chromatin is digested by mitotic enzymes.
c.
The chromatin is coiled up into visible chromosomes.
d.
The chromatin is so tightly coiled that you cannot observe it.
Hint
11.
A shipwrecked sailor should not drink ocean water because __________.
a.
ocean water is hypotonic to tissue fluid
b.
ocean water is hypertonic to tissue fluid
c.
ocean water is isotonic to tissue fluid
d.
tissue fluid is hypertonic to ocean water
Hint
12.
Uncontrolled dividing of cells is known as __________.
a.
interphase
b.
cancer
c.
mitosis
d.
cytokinesis
Hint
13.
During which phase do most cells spend the most time?
a.
metaphase
b.
anaphase
c.
interphase
d.
prophase
Hint
14.
If celery is left in the refrigerator for a long time, it will become limp because __________.
a.
it loses turgor pressure
b.
it gains turgor pressure
c.
it loses its ion channels
d.
it increases active transport
Hint
15.
__________ is the diffusion of water through a selectively permeable membrane.
a.
Active transport
b.
Osmosis
c.
Passive transport
d.
Turgor pressure
Hint
