Post on 27-Mar-2015
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Cell ReproductionPart 2
26. Which of the following is not monitored in G2 phase?
Cell size Cell size
Alignment on the metaphase plateAlignment on the metaphase plate
Cellular environment Cellular environment
DNA replication DNA replication
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27. Deactivation of M-phase-promoting factor signals entry into which of the
following mitotic phases?
Prophase Prophase
AnaphaseAnaphase
Metaphase Metaphase
Prometaphase Prometaphase
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28. A cell with a diploid number of 20 has which of the following haploid
numbers?
80 80
10 10
40 40
2 2
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29. During which of the following cell cycle phases does DNA replication
take place?
M phase M phase
S phaseS phase
G1 G1
G2 G2
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30. During which sub-phase of mitotic anaphase do centrosomes separate?
Anaphase D Anaphase D
Anaphase BAnaphase B
Anaphase C Anaphase C
Anaphase A 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 80
4040
20 20
10 10
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32. Which of the following is not a stage of mitotic interphase?
G1 G1
M phaseM phase
S phase S phase
G2 G2
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33. During which sub-phase of mitotic anaphase do chromosomes
separate?
Anaphase B Anaphase B
Anaphase AAnaphase A
Anaphase C Anaphase C
Anaphase D Anaphase D
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34. What is the typical duration of a normal, fast-dividing, mammalian cell
cycle?
1 hour 1 hour
24 hours24 hours
10 hours 10 hours
1 year 1 year
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35. The human haploid number is which of the following?
30 30
2323
10 10
46 46
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36. Which of the following events takes place during mitotic telophase?
Disassembly of nuclear envelope Disassembly of nuclear envelope
Reassembly of nuclear envelopeReassembly of nuclear envelope
Metaphase plate formation Metaphase plate formation
Cell division 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 Interphase
G1 G1
M phase M phase
S phase S phase
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38. How many homologous pairs are present in a cell with a diploid
number of 40?
40 40
1010
5 5
20 20
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39. Which class of microtubules disappears during mitotic telophase?
Astral Astral
KinetochoreKinetochore
Polar Polar
Radial Radial
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40. Which of the following is typically the longest phase of the cell cycle?
M phase M phase
G1G1
G2 G2
S phase S phase
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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 5
1010
20 20
40 40
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42. Which class of microtubule elongates during mitotic telophase?
Astral Astral
PolarPolar
Kinetochore Kinetochore
Radial Radial
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43. Which of the following phases usually contains the highest concentration of DNA
per cell?
G1 G1
G2G2
M phase M phase
S phase S phase
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44. Germ cells give rise to what class of cell?
Mitotic Mitotic
GameteGamete
Somatic Somatic
Meiotic Meiotic
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45. Which of the following is not a component of the contractile ring?
Actin Actin
Cyclin Cyclin
Myosin Myosin
Tubulin Tubulin
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46. During which phase do mitotic cyclins accumulate in the cell cycle?
S phase S phase
G2G2
M phase M phase
G1 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?
5 5
2020
40 40
10 10
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48. Which of the following is not a type of cell that results from meiotic
cellular reproduction?
Germ cell Germ cell
Gamete Gamete
DiploidDiploid
Haploid 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 M phase
S phaseS phase
G2 G2
G1 G1
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50. During which phase of meiosis does genetic re-assortment take place?
Prometaphase 1 Prometaphase 1
Prophase 1Prophase 1
Metaphase 1 Metaphase 1
Anaphase 1 Anaphase 1
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http://www.biology.arizona.edu/cell_bio/tutorials/cell_cycle/cells3.html