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Cell Reproduction
Part 2
26. Which of the following is not
monitored in G2 phase?
Cell size
Alignment on the metaphase plate
Cellular environment
DNA replication
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27. Deactivation of M-phase-promoting
factor signals entry into which of the
following mitotic phases?
Prophase
Prometaphase
Metaphase
Anaphase
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28. A cell with a diploid number of 20
has which of the following haploid
numbers?
10
80
40
2
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29. During which of the following cell
cycle phases does DNA replication
take place?
M phase
S phase
G1
G2
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30. During which sub-phase of mitotic
anaphase do centrosomes separate?
Anaphase D
Anaphase C
Anaphase B
Anaphase A
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31. A somatic cell has a haploid
number of 10. What is its diploid
number after DNA replication?
80
40
20
10
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32. Which of the following is not a stage
of mitotic interphase?
G1
G2
S phase
M phase
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33. During which sub-phase of
mitotic anaphase do chromosomes
separate?
Anaphase A
Anaphase B
Anaphase C
Anaphase D
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34. What is the typical duration of a
normal, fast-dividing, mammalian
cell cycle?
1 hour
10 hours
24 hours
1 year
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35. The human haploid number is
which of the following?
30
46
10
23
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36. Which of the following events takes
place during mitotic telophase?
Disassembly of nuclear envelope
Reassembly of nuclear envelope
Metaphase plate formation
Cell division
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37. In extremely fast dividing cells, which
of the following phases of the cell cycle is
likely to be decreased or eliminated?
Interphase
M phase
G1
S phase
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38. How many homologous pairs are
present in a cell with a diploid
number of 40?
10
40
5
20
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39. Which class of microtubules
disappears during mitotic telophase?
Astral
Kinetochore
Polar
Radial
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40. Which of the following is typically
the longest phase of the cell cycle?
M phase
S phase
G2
G1
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41. A somatic cell has a haploid number
of 10. After mitosis, what is the haploid
number of each of the resulting cells ?
5
10
20
40
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42. Which class of microtubule
elongates during mitotic telophase?
Astral
Kinetochore
Polar
Radial
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43. Which of the following phases usually
contains the highest concentration of DNA
per cell?
G1
G2
M phase
S phase
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44. Germ cells give rise to what
class of cell?
Mitotic
Meiotic
Somatic
Gamete
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45. Which of the following is not a
component of the contractile ring?
Actin
Cyclin
Myosin
Tubulin
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46. During which phase do mitotic
cyclins accumulate in the cell cycle?
S phase
M phase
G2
G1
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47. A somatic cell has a haploid number of
20. After DNA replication, how many pairs
of sister chromatids are in the cell?
20
5
40
10
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48. Which of the following is not a
type of cell that results from meiotic
cellular reproduction?
Germ cell
Gamete
Diploid
Haploid
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49. The activation of cyclin-dependent
protein kinases by G1 cyclins signals entry
into which mitotic cell cycle phase?
M phase
S phase
G2
G1
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50. During which phase of meiosis does
genetic re-assortment take place?
Prometaphase 1
Prophase 1
Metaphase 1
Anaphase 1
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http://www.biology.arizona.edu/cell_bio/tutorials/cell_cycle/cells3.html