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