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CAMPBELL BIOLOGY IN FOCUS
Urry • Cain • Wasserman • Minorsky • Jackson • Reece
9
The Cell Cycle
Questions prepared by
Brad Stith, University of Colorado Denver
Louise Paquin, McDaniel College
© 2014 Pearson Education, Inc.
How many chromosomes are in the middle cell?
A. 1
B. 2
C. 4
D. 8
© 2014 Pearson Education, Inc.
How many chromosomes are in the middle cell?
A. 1
B. 2
C. 4
D. 8
© 2014 Pearson Education, Inc.
At what part of the cell cycle would you see a
chromosome that looks like this? Give your reasons.
A. G1
B. G2
C. M
D. S
© 2014 Pearson Education, Inc.
At what part of the cell cycle would you see a
chromosome that looks like this? Give your reasons.
A. G1
B. G2
C. M
D. S
© 2014 Pearson Education, Inc.
Although the chromosome begins M phase looking as
shown below, when is it split? Give your reasons.
A. prophase
B. prometaphase
C. metaphase
D. anaphase
E. telophase
© 2014 Pearson Education, Inc.
Although the chromosome begins M phase looking as
shown below, when is it split? Give your reasons.
A. prophase
B. prometaphase
C. metaphase
D. anaphase
E. telophase
© 2014 Pearson Education, Inc.
Which of the following best describes the kinetochore?
A. a structure composed of several proteins that
associate with the centromere region of a
chromosome and that can bind to spindle
microtubules
B. the centromere region of a metaphase chromosome at
which the DNA can bind with spindle proteins
C. the array of vesicles that will form between two dividing
nuclei and give rise to the metaphase plate
D. the ring of actin microfilaments that will cause the
appearance of the cleavage furrow
E. the core of proteins that forms the cell plate in a dividing
plant cell
© 2014 Pearson Education, Inc.
Which of the following best describes the kinetochore?
A. a structure composed of several proteins that
associate with the centromere region of a
chromosome and that can bind to spindle
microtubules
B. the centromere region of a metaphase chromosome at
which the DNA can bind with spindle proteins
C. the array of vesicles that will form between two dividing
nuclei and give rise to the metaphase plate
D. the ring of actin microfilaments that will cause the
appearance of the cleavage furrow
E. the core of proteins that forms the cell plate in a dividing
plant cell
© 2014 Pearson Education, Inc.
If you were to examine a sample of connective
tissue cells from a small but adult mammal and a
second sample from a fetus of the same species,
in which would you expect to find more cells
undergoing mitosis? Why?
© 2014 Pearson Education, Inc.
A new cell is found and separation of its chromosomes is
examined. How would you interpret this result?
A. Chromosomes are
separated by microfilaments.
B. Chromosomes are
not separated.
C. Microtubules shorten
at the centrosome end.
D. Microtubules shorten
at the chromosome end.
© 2014 Pearson Education, Inc.
A new cell is found and separation of its chromosomes is
examined. How would you interpret this result?
A. Chromosomes are
separated by microfilaments.
B. Chromosomes are
not separated.
C. Microtubules shorten
at the centrosome end.
D. Microtubules shorten
at the chromosome end.
© 2014 Pearson Education, Inc.
A. What would you expect to happen if you fuse a
cell in S with a cell in G1? Why?
B. What would you expect to happen to a nucleus
from a G1 cell if it is introduced into an enucleated
M cell? Why?
© 2014 Pearson Education, Inc.
What do the differences among the division of these
cells demonstrate?
© 2014 Pearson Education, Inc.
At which part of the cell cycle would you expect that
a change in regulation could result in cancer?
Provide a reason for your answer.
© 2014 Pearson Education, Inc.