9th class Biology Chapter no.5 MCQs
Unit no.5 MCQs of 9th Class Biology
Cell Cycle:
1. In which stage of the cell cycle each chromosome is duplicated and so it consists of two chromatids?
a. M Phase
b. G1 Phase
c. G2 Phase
d. S Phase
2. During which phase of mitosis spindles are formed?
a. G2 Phase
b. Prophase
c. Interphase
d. Metaphase
3. In which stage of the cell cycle, the cell is preparing to begin DNA replication?
a. M Phase
b. G1 Phase
c. G2 Phase
d. S Phase
4. In which stage of the cell cycle most cells spend their lives?
a. Interphase
b. Prophase
c. Telophase
d. Metaphase
5. Prior to cell division, each chromosome replicates or duplicates its genetic material. The products are connected by a centromere and are called:
a. Non-sister chromatids
b. Sister chromosomes
c. Sister chromatids
d. Homologous chromosomes
6. Which event distinguishes meiosis from mitosis?
a. Formation of metaphase plate
b. Condensation of chromosomes
c. Pairing of homologous chromosomes
d. Loss of the nuclear membrane
7. For mitosis, the chromosomes of cell duplicate during interphase. When do the chromosomes duplicate for meiosis?
a. During meiosis I
b. Before meiosis I
c. Do not duplicate
d. Before meiosis II
8. The phase of cell cycle in which cell prepares itself for division is called:
a. Metaphase
b. Prophase
c. Telophase
d. Interphase
9. In which stage of cell cycle, the cell is preparing enzymes for chromosome duplication?
a. S
b. G1
c. M
d. G2
10. In which stage of the cell cycle cells spend most of their lives?
a. Interphase
b. Prophase
c. Telophase
d. Metaphase
11. In ……… phase cells have temporarily or permanently stopped dividing:
a. S phase
b. G1
c. G0 phase
d. M phase
12. Chromosomes are visible during:
a. S phase
b. Interphase
c. Cell division
d. G1 phase
13. Chromosomes are composed of:
a. RNA
b. Lipids
c. DNA and protein
d. DNA
14. At which stage of a cell cycle cell stop dividing?
a. G2
b. G0
c. S
d. G1
15. At which stage cell doubles its chromosomes?
a. G2
b. G1
c. G0
d. S
16. Which of the following features of cell division are very different for the animal and plant cells?
a. Telophase
b. Metaphase
c. Cytokinesis
d. Anaphase
17. The division of cytoplasm is called:
a. Kinetokore
b. Karyokinesis
c. Mitoses
d. Cytokinesis
18. During which phase of mitosis, spindles are formed?
a. Prophase
b. G2
c. Metaphase
d. Interphase
19. Complete set of spindle fibre is known as:
a. Centromere
b. Centrosome
c. None
d. Mitotic spindle
20. Which phase of cell division is very different in plants and animals?
a. Telophase
b. Meta phase
c. Cytokinesis
d. Anaphase
21. The division of nucleus is called:
a. Karyokinesis
b. Synapsis
c. Interphase
d. Cytokinesis
22. The animal which produces lost part with the process of regeneration is:
a. Sea lion
b. Paramecium
c. Sea urchin
d. Sea star
23. In which phase of mitosis nuclear envelop of a cell is broken down?
a. Anaphase
b. Prophase
c. Telophase
d. Metaphase
24. Regeneration process is found in:
a. Moss
b. Hydra
c. Sea star
d. Funaria
25. In which phase of a cell cycle spindle fibers are formed?
a. Prophase
b. G2 phase
c. Metaphase
d. Interphase
26. ……… is reversal of prophase:
a. Interphase
b. Metaphase
c. Telophase
d. Anaphase
27.Error in the control of mitosis may cause:
a. Ulcer
b. Cough
c. Cancer
d. Constipation
28. Process of formation of new tumors is known as:
a. Metastasis
b. Synapsis
c. Regeneration
d. Crossing over
29. A tumor, which remains in their original location is called:
a. Metastasis
b. Malignant
c. Benign
d. All
30. Mitosis consists of ……… phases:
a. Three
b. One
c. Four
d. Two
31. Star fish regains its lost limb by:
a. Mitosis
b. Budding
c. Frag
d. meiosis
32. During which phase the metabolic activities of cell are very high?
a. Interphase
b. Prophase
c. Anaphase
d. Metaphase
33. Which organisms regenerate its lost parts through mitosis?
a. Mosquito
b. Sea star
c. Frog
d. Horse
34. Mitosis is divided into ……… major sources:
a. Four
b. Two
c. Five
d. Three
35. Oscar hertwing discovered meiosis in:
a. 1877
b. 1875
c. 1878
d. 1876
36. Meiosis was discovered for the first time by:
a. August Weismann
b. Rudolf Virchow
c. Oscar Hertwig
d. Walther Flemming
37. In which organism the Thomas Hunt Morgan observed the phenomenon of crossing over?
a. Fruit fly
b. Bat
c. Sparrows
d. Mosquito
38. The exchange of parts of chromatids of homologous chromosomes is called:
a. Linkage
b. Chiasmata
c. Phragmoplast
d. Crossing over
39. Which of the following distinguishes meiosis from mitosis?
a. The daughter cells are genetically different from the parent cell
b. The chromosomes number is reduced
c. Chromosomes undergo crossing over
d. All of these
40. Which phase is the longest in meiosis?
a. Telophase-2
b. Prophase-2
c. Metaphase- 1
d. Prophase-1
41. The phase in which crossing over occurs:
a. Telophase-2
b. Prophase-2
c. Metaphase- 1
d. Prophase-1
42. In 1911, ……… observed crossing over in a fruit fly:
a. Mendel
b. Morgan
c. Lamark
d. Weisman
43. During meiosis one cell divides into daughter cells:
a. Four
b. Tow
c. Eight
d. Three
44. Chiasmata is formed during:
a. Prophase
b. Metaphase
c. Telophase
d. Anaphase
45. The word meiosis is derived from a Greek work meion, which means:
a. To cut
b. To make smaller
c. To duplicate
d. To make bigger
46. The chromosomes arrange themselves along theequator of the cell in phase:
a. Anaphase
b. Prophase
c. Telophase
d. Metaphase
47. Accidental death of cells and living tissues known as:
a. Necrosis
b. Cancer
c. Both A and D
d. Apoptosis
48. Cells die each day by apoptosis in an adult human:
a. 50-90 billion
b. 50-100 billion
c. 50-70 billion
d. 50-80 billion
49. Sea star eats:
a. Protists
b. Algae
c. Muscle
d. Fungi
Click here to go directly on chapter no.6