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Cell Division
CHAPTER 1: CELL DIVISION
MULTIPLE CHOICE QUESTIONS
1. During the ‘gap’ phases of the cell cycle, most of the activity is directed towards
A. DNA replication.
B. Resting for the next step.
C. Sorting the chromosomes.
D. Synthesizing cytoplasmic organelles.
2. DNA replication occurs
A. between the gap phases of interphase
B. immediately before prophase of mitosis
C. during prophase of mitosis
D. during prophase of meiosis
3. The process of replication in the S phase of the cell cycle is connected with which
of the followings?
A. Doubling of the number of chromatids.
B. Doubling of the DNA content exclusively.
C. Doubling of the number of chromosomes.
D. Doubling of the amount of energy in mitochondria.
4. A particular cell has half as much DNA as some of the other cells in a mitotically
active tissue. The ‘cell’ is most likely in….
A. G1
C. Metaphase
B. G2
D. Anaphase
5. At which stages of the mitotic cell cycle do these events occur?
A.
B.
C.
D.
DNA replication
Breakdown of nuclear
membrane
Division of
centromere
Interphase
Interphase
Interphase
Prophase
Metaphase
Prophase
Interphase
Prophase
Metaphase
Anaphase
Anaphase
Anaphase
6. Mitosis involves the following stages.
1
2
3
4
Chromosomes line up on the equatorial plate
Nuclear envelope forms and cytoplasmic division begins
Chromosomes become visible and spindle forms
Sister chromatids move to opposite ends of the cell
What are the correct names of these stages?
Biology Unit, KMJ 08-09
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Cell Division
A.
B.
C.
D.
1
Prophase
Prophase
Metaphase
Metaphase
2
Anaphase
Telophase
Anaphase
Telophase
3
Metaphase
Metaphase
Prophase
Prophase
4
Telophase
Anaphase
Telophase
Anaphase
7. Figure 1 shows measurements taken during one mitotic cell cycle.
Figure 1
Which stage of mitosis occurs during X and which measurements are illustrated
by curves 1 and 2?
Stage of mitosis
commencing at X
A.
B.
C.
D.
Anaphase
Anaphase
Metaphase
Metaphase
Distance between centromeres
of chromosomes & poles of
spindle
Distance between
centromeres of sister
chromatids
1
2
1
2
2
1
2
1
8. Figure 2 shows the chromosome complement of a cell just before the metaphase
stage of mitosis.
Figure 2
What will be the chromosome complement at telophase?
Biology Unit, KMJ 08-09
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Cell Division
A.
B.
C.
D.
9. If a parent cell has fourteen chromosomes prior to mitosis, how many
chromosomes will each daughter cell have?
A. Twenty-eight because each chromatid is a chromosome.
B. Fourteen because the chromatids separate.
C. Only seven after mitosis is finished.
D. Any number between seven and twenty-eight.
10.
Mitosis and cytoplasmic division function in….
A. Growth, tissue repair, and sometimes asexual reproduction in many
multicellular eukaryotes.
B. Asexual reproduction of single-celled eukaryotes.
C. Gamete formation in prokaryotes.
D. Both A and B
11. Figure 3 shows anaphase of mitosis.
Figure 3
Which diagram shows anaphase I during meiosis in the same organism?
A.
B.
C.
D.
12. Figure 4 shows a cell at anaphase I of meiosis.
Figure 4
Biology Unit, KMJ 08-09
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Cell Division
Which diagram shows a normal gamete that could be produced from this cell?
A.
B.
C.
D.
13. Figure 5 shows some chromosomes at late prophase of mitosis.
Figure 5
How many chromosomes would be present in one nucleus at telophase II of
meiosis?
A. 6
B. 12
C. 18
D. 24
14. How does the second meiotic division differ from mitosis?
In the second meiotic division….
A. Chiasmata form between the chromatids of a bivalent.
B. Each chromosome replicates to form two chromatids during metaphase.
C. Exchange of genetic material occurs between chromatids.
D. The separating chromatids of a pair differ genetically.
15. Which of the following sentences about meiosis are correct?
I. Meiosis halves the amount of DNA.
II. Meiosis enables sexual reproduction.
III. Meiosis results in the genetic diversity of offspring.
IV. The first meiotic division in eukaryotes is similar to mitosis.
V. Meiosis in higher eukaryotes occurs in somatic cells and gametes.
A.
B.
C.
D.
I, II and IV
I, II and III
II, III and V
II, III and IV
Biology Unit, KMJ 08-09
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Cell Division
STRUCTURED QUESTIONS
1. Figure 6 below shows 4 stages of mitosis in animal cell.
Figure 6
a) Name the structures
A : __________________
C : ____________________
B : __________________
D : ____________________
[4 marks]
b) i.
Name the stages of division shown by cells 1 and 3.
Cell 1: __________________
Cell 3: __________________
[2 marks]
ii. Using the number given to each cell above, arrange the stages as they
occur in the mitotic sequence.
____________________________________________________________
[1 mark]
c) If one organism has 92 chromatids in a somatic cell, how many chromosomes
are there during:
i. metaphase in meiosis I :
____________________
ii. metaphase in mitosis
:
____________________
iii. metaphase in meiosis II :
____________________
[3 marks]
Biology Unit, KMJ 08-09
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Cell Division
2. a) Review the steps of mitosis.
i. At which step do the chromosomes separate?
____________________________________________________________
ii. When does the chromatin condense into chromosomes?
____________________________________________________________
iii. Why must mitosis be preceded by replication of the chromosomes?
____________________________________________________________
[3 marks]
b) Figure 7 represents the amount of DNA present per cell during several nuclear
divisions.
4n
2n
Z
n
W
X
Y
Time
Figure 7
i. Which type of nuclear division is represented by the diagram?
____________________________________________________________
[1 mark]
ii. State TWO reasons why the process in (i) is necessary.
____________________________________________________________
____________________________________________________________
[2 marks]
iii. What phases are represented by the dashed lines W, X, and Y?
W : ____________________
X : ____________________
Y : ____________________
[3 marks]
Biology Unit, KMJ 08-09
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Cell Division
iv. What type of cells is represented by the line Z?
____________________________________________________________
[1 mark]
3. a) i. Draw diagrams of metaphase I and anaphase for the cell shown below.
Figure 8
Metaphase I
Anaphase
[4 marks]
ii. Describe the events that occur in the cell immediately before metaphase I.
____________________________________________________________
____________________________________________________________
[2 marks]
iii. Suggest why it is important that the chromatids remain attached at the
centromere until anaphase?
____________________________________________________________
____________________________________________________________
[2 marks]
Biology Unit, KMJ 08-09
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Cell Division
b) i. How does the amount of DNA in a nucleus differ between the start and the
end of interphase?
____________________________________________________________
[1 mark]
ii. There are 46 chromosomes in a human body cell. How many DNA
molecules are there in a cell nucleus at the start of prophase?
____________________________________________________________
[1 mark]
ESSAY QUESTIONS
1. a) With the help of labelled drawings, describe the behavior of chromosomes in a
cell that contains a chromosome number of 2n=4 in each of the followings:i. Metaphase of mitosis, metaphase I and metaphase II.
ii. Anaphase of mitosis, anaphase I and anaphase II. State the number of
chromosomes and chromatids for each cell after completing cytokinesis.
[12 marks]
b) How do animal and plant cells differ in the way they divide through mitosis?
[4 marks]
c) State the significance of mitosis.
[4 marks]
2. a) With the aid of labelled drawings, describe meiosis I
[8 marks]
b) List the significant differences between mitotic and meiotic cell divisions.
[12 marks]
Biology Unit, KMJ 08-09
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