Cell Continuity and Diversity
1. Name a human cell that is haploid
2. What is meant by the diploid number of a cell?
3. If the diploid number in a cell is 46, the haploid number is …
4. Explain the term diploid number.
5. The haploid number of chromosomes is found in the human egg and sperm. Explain the
underlined term.
6. True or false. Mitosis is the division of a nucleus into two identical nuclei
7. State a function of mitosis in a single-celled organism.
8. State a function of mitosis in a multicellular organism.
9. State one way in which mitosis differs from meiosis.
10. How many cells are formed when a cell divides by mitosis?
11. For what purpose do single-celled organisms use mitosis?
12. For convenience of study, mitosis is divided into four stages. List these in order.
13. What term is used to describe a group of disorders of the body in which cells lose the normal
regulation of mitosis?
14. Some cells in the human body undergo meiosis. Give one function of meiosis.
15. Where does meiosis occur in the human male?
16. Give the names of the two processes involving DNA which take place during interphase.
17. What is a tissue?
18. Name two tissues found in animals.
19. What is meant by tissue culture?
20. Suggest a reason why sterile conditions are needed in tissue culture.
21. Name the gas needed to release energy to make a skin graft.
22. Suggest the most suitable temperature to make skin cells grow for a skin graft.
23. What type of cell division, mitosis or meiosis, is involved in tissue culture?
24. Give one other application of tissue culture apart from skin grafting.
25. What is the function of mitosis in single-celled organisms?
26. Give one function of mitosis in multicellular organisms.
27. Give one location where mitosis occurs in flowering plants.
28. True or False. The cells produced by mitosis are identical.
29. True or False. Meiosis gives rise to variation.
30. True or False. Mitosis always produces four new cells.
31. True or False. Meiosis is never involved in gamete formation.
32. True or False. Single-celled organisms use mitosis for reproduction.
33. In biology, what is meant by the term organ?
34. What is a tissue?
35. Name a tissue found in animals. Give a function of the tissue referred to.
36. Explain what is meant by the term tissue culture
37. Give one application of tissue culture.
38. To which kingdom does Amoeba belong?
39. Is the cell of Amoeba prokaryotic or eukaryotic? Give a reason for your answer.
40. Give one function of the contractile vacuole in Amoeba.
41. Suggest one reason why a contractile vacuole is more active in freshwater amoebae than in
marine amoebae.
42. What is the function of spindle fibres?
43. Tissues grow by cell division. Name the type of cell division by which tissues grow.
44. Organs are found in both plants and animals. What is meant by the term organ?
45. Name one organ found in plants.
46. What is the role of mitosis in single-celled organisms?
47. What medical term is used for the group of disorders in which certain cells lose normal
control of mitosis?
48. Suggest a possible cause of one of the group of disorders referred to in Q.47
49. Name the stage of mitosis in which the chromosomes are located at the equator of the cell
and before they begin to separate.
50. To what are the chromosomes attached during metaphase and anaphase
51. Towards the end of mitosis, in what type of cell does a cell plate form?
52. Give one way in which mitosis differs from meiosis.
53. What is a tissue?
54. Give an example of an animal tissue.
55. State a role of the animal tissue referred to in (ii).
56. Give one way in which the tissue referred to in (ii) is adapted to carry out its function(s).
57. Explain the term tissue culture.
58. Give two examples of the use of tissue culture.
59. True or False.
An organ is a group of systems.
60. What is a tissue?
61. Name a gas that would be needed for the growth of tissue in the laboratory.
62. Why are sterile conditions needed to grow the tissue?
63. What type of cell division, mitosis or meiosis, is involved in tissue culture?
64. What medical term is used to describe the disease caused by uncontrolled mitosis in human
cells?
65. Give two causes of this uncontrolled cell division.
66. Draw a labelled diagram to show the normal cell cycle.
67. What is the function of meiosis?
68. What name is applied to the period of the cell cycle in which division is not taking place?
69. Give a cellular process that occurs during this period in which the nucleus is not dividing./
70. Draw a labelled diagram to show the position of the chromosomes during metaphase of
mitosis in a nucleus in which 2n = 6. State a function of one of the structures, other than
chromosomes, that you have labelled in your diagram of metaphase. How does the structure
carry out this function?
71. What term is used for the group of disorders in which control has been lost over the rate of
mitosis?
72. Name the two types of cell division.
73. Cancer is the uncontrolled multiplication of abnormal cells. Give two causes of cancer.
74. Suggest a possible treatment for cancer.
75. Single-celled organisms use meiosis for asexual reproduction.
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F
76. In telophase of mitosis, a cleavage furrow forms in plant cells.
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F
77. When a cell is not dividing it is said to be in prophase.
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F
78. The nuclear membrane disappears in the early part of mitosis.
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F
79. Centromeres give rise to the nuclear spindle.
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F
80. Mitosis is a source of variation.
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F
81. In multicellular organisms mitosis is primarily used for growth.
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F
82. Choose a term from the list to match the statement that follows. List: Skin graft; Dermal;
Organ; Leaf; Tissue; In vitro growth. Statement: A group of cells with the same function.
83. Choose a term from the list to match the statement that follows. List: Skin graft; Dermal;
Organ; Leaf; Tissue; In vitro growth. Statement: A plant organ.
84. Choose a term from the list to match the statement that follows. List: Skin graft; Dermal;
Organ; Leaf; Tissue; In vitro growth. Statement: The heart.
85. Choose a term from the list to match the statement that follows. List: Skin graft; Dermal;
Organ; Leaf; Tissue; In vitro growth. Statement: A use of tissue culture.
86. Choose a term from the list to match the statement that follows. List: Skin graft; Dermal;
Organ; Leaf; Tissue; In vitro growth. Statement: A plant tissue.
87. How many cells are formed when a cell divides by mitosis? Name the other type of cell
division.
88. What is the purpose of mitosis in single-celled organisms?
89. Name a single-celled organism.
90.