Biology For Class IX - Chapter No.5 - CELL CYCLE - MCQs and Fill In the Blanks

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CHAPTER 5
CELL CYCLE

Multiple Choice Questions (MCQs)

Encircle the correct Answer:
1. Which processes involve mitosis?
(a) Growth, reduction division and asexual reproduction
(b) Growth, repair and asexual reproduction ✓
(c) Growth, repair and semi conservative replication
(d) Growth, reduction division and repair

2. What occurs in metaphase of mitosis?
(a) Chromosome line up on the equator of the cell ✓
(b) Chromatids reach the poles of the spindle
(c) Chromatids separate and move to opposite poles
(d) Chromosomes start to coil up and become visible

3. Select the mismatched:
(a) Anaphase 4 Chromatids move
(b) Prophase 4 Centriole move
(c) Telophase 4 Nuclear membrane disappear ✓
(d) Metaphase 4 Chromosome line up

4. Which process occurs during prophase of mitosis in an animal cell?
(a) Division of centromeres
(b) Formation of chromosomes ✓
(c) Replication of DNA
(d) Separation of centrioles

5. Sequence of physiological changes by which cell commit suicide.
(a) Apoptosis
(b) Necrosis
(c) Autophagy
(d) Both Apoptosis and Autophagy ✓

6. Choose the Incorrect statement regarding meiosis.
(a) Maintain chromosome number from generation to generation
(b) Reduces the diploid number of chromosomes to half
(c) Takes place in germ cell to produce gametes
(d) Production of new somatic cells from germ cells ✓

7. A type of cell division in which spore mother cell produce spores
(a) Amitosis
(b) Mitosis
(c) Meiosis ✓
(d) Both Amitosis and Meiosis

8. Stage of mitosis in which chromatids reach the poles and their movement ceases.
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase ✓

9. Stage of meiosis in which centromeres shorten and the paired chromatids are pulled away from one another.
(a) Anaphase-II ✓
(b) Metaphase-II
(c) Telophase-Il
(d) Prophase-II

10. Phenomenon in which pair of homologous chromosomes fails to separate called:
(a) Non-disjunction ✓
(b) Terminalization
(c) Synapsis
(d) Linkage

11. In 1882, the term 'chromosomes' was given by German embryologist:
(a) Walter Fleming ✓
(b) Leeuwenhoek
(c) Carolus Linnaeus
(d) Ernst Hackle

12. Chromosomes contain heredity units called:
(a) Chitin
(b) Apoptosis
(c) Genes ✓
(d) Diplotene

13. A chromosome has:
(a) two parts ✓
(c) four parts
(b) three parts
(d) five parts

14. The chromosomes are of different types, depending upon:
(a) size of chromosomes
(b) shape of chromosomes
(c) length of its arms
(d) position of centromere ✓

15. Chromosomes with equal arms are called:
(a) sub-meta centric
(b) metacentric ✓
(c) sub-telocentric
(d) telocentric

16. Chromosomes with unequal arms are known as:
(a) sub-meta centric ✓
(b) metacentric
(c) sub-telocentric
(d) telocentric

17. Rod like chromosomes with one arm very small and other very long.
(a) sub-meta centric
(b) metacentric
(c) sub-telocentric ✓
(d) telocentric

18. Location of centromere at the end of chromosomes.
(a) sub-meta centric
(b) metacentric
(c) sub-telocentric
(d) telocentric ✓

19. Each chromosome in eukaryotes is composed of:
(a) chitin
(b) chromatin fiber ✓
(c) genes
(d) diplotene

20. In the beginning of cell-division each chromosome is consist of two genetically identical copies of thread attach with each other called:
(a) chromatids ✓
(b) chromatin fiber
(c) genes
(d) diplotene

21. Chromatin fiber is made of:
(a) chromatids
(b) nucleosomes ✓
(c) chromatin
(d) diplotene

22. Chromatin fibers are packaged by protein into a condensed structure called:
(a) chromatids
(b) nucleosomes
(c) chromatin ✓
(d) diplotene

23. The sequence of changes which occurs between one cell division and the next is called:
(a) interphase
(b) cell cycle ✓
(c) M-phase
(d) G-phase

24. A cell cycle has:
(a) two phase ✓
(b) three phases
(c) four phases
(d) five phases

25. It is the period of non-division.
(a) M-phase
(c) S-phase
(b) G-phase
(d) interphase ✓

26. It is the period of cell division.
(a) M-phase ✓
(b) G-phase
(c) S-phase
(d) interphase

27. The period of cell cycle between two consecutive divisions is called:
(a) M-phase
(b) G-phase
(c) 5-phase
(d) interphase ✓

28. It is the period of growth and synthesis of DNA.
(a) M-phase
(b) G-phase
(c) interphase ✓
(d) G2 phase

29. The interphase is divided further into:
(a) two sub-phases
(b) three sub-phases ✓
(c) four sub-phases
(d) five sub-phases

30. It is the period of extensive metabolic activity.
(a) G3-phase ✓
(b) G2-phase
(c) S-phase
(d) prophase

31. At a point in G1-Phase, the cell may enter into a phase where cell cycle stop, known as:
(a) G2-Phase
(b) S-Phase
(c) Anaphase
(d) G-Phase ✓

32. During this phase, replication of DNA occues.
(a) G2-Phase
(b) S-Phase ✓
(c) Anaphase
(d) G-Phase

33. If the number of chromosomes in the daughter cells remains the same as in the parent cell, this type of cell division is called:
(a) cytokinesis
(b) meiosis
(c) mitosis ✓
(d) metaphase

34. Although mitosis is a continuous process, but for the study point of view it is divide into:
(a) two phases ✓
(b) three phases
(c) four phases
(d) five phases

35. In mitosis, the phase of nuclear division is:
(a) Anaphase
(b) Telophase
(c) Cytokinesis
(d) Karyokinesis ✓

36. In mitosis, the phase of cytoplasmic division is called:
(a) Anaphase
(b) Telophase
(c) Cytokinesis ✓
(d) Karyokinesis

37. The mitosis phase, Karyokinesis, can be divided further for convenience into:
(a) two phases
(b) three phases
(c) four phases ✓
(d) five phases

38. In prophase of mitosis chromatin network becomes thick and thread like structure is called:
(a) chromosomes ✓
(b) chromatid
(c) centromere
(d) centrosome

39. During this phase each chromosome arranges itself on the equator of the spindle.
(a) Prophase
(b) Metaphase ✓
(c) Anaphase
(d) Telophase

40. Chromatids of each chromosome begin to move towards opposite pole in:
(a) Prophase
(b) Metaphase
(c) Anaphase ✓
(d) Telophase

41. In mitosis, the nuclear membrane is reformed and two daughter nuclei formed during:
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase ✓

42. In mitosis, cytoplasm divides and two daughter cells are formed during:
(a) prophase
(b) cytokinesis ✓
(c) telophase
(d) metaphase

43. In animal cell, cytokinesis takes place by developing a:
(a) cell boundary
(b) cell plate
(c) constriction ✓
(d) divider

44. In plant cells, cytokinesis occurs by developing:
(a) cell boundary
(b) cell plate ✓
(c) constriction
(d) divider

45. The production of somatic cells, such as blood cells, depends on:
(a) mitosis ✓
(b) meiosis
(c) cytokinesis
(d)Allofthem

46. The healing of wounds, repair of wear and tear within organism is dependent upon:
(a) pachytene
(b) diplotene
(c) mitotic division ✓
(d) meiotic division

47. Programmed changed which lead to sequence of physical changes in cell by which cells commit suicide collectively called:
(a) apoptosis ✓
(b) necrosis
(c) diakinesis
(d) interphase

48. Cell death caused by external factors is called:
(a) apoptosis
(b) necrosis ✓
(c) diakinesis
(d) interphase

49. Cell division in which single cell divides into four daughter cells and number of chromosomes becomes half in each daughter cell is called:
(a) cytokinesis
(b) diakinesis
(c) mitosis
(d) meiosis ✓

50. In animals, meiosis takes place in germ cell to produce:
(a) gametes ✓
(b) spores
(c) only eggs
(d) only sperms

51. Meiosis is a series of two divisions which result in the formation of:
(a) two haploid cells
(b) three haploid cells
(c) four haploid cells ✓
(d) five haploid cells

52. Meiosis I consists of:
(a) two phases
(c) four phases ✓
(b) three phases
(d) five phases

53. It consists of the longest phase of meiosis:
(a) Prophase I✓
(c) Anaphase I
(b) Metaphase I
(d) Telophase I

54. During the first sub stage of prophase I, the chromatin network break into specific number of long thin beaded thread called:
(a) diplotene
(b) pachytene
(c) leptotene ✓
(d) zygotene

55. During this sub stage of prophase I, lengthwise pairing of chromosomes takes place.
(a) diplotene
(b) pachytene
(c) leptotene
(d) zygotene ✓

56. The pairing of homologous chromosomes is known as:
(a) bivalent
(b) synapsis ✓
(c) autophagy
(d) apoptosis

57. The paired homologous chromosomes are known as:
(a) bivalent ✓
(b) synapsis
(c) autophagy
(d) apoptosis

58. During pachytene sub-phase, the separation of paired chromosomes is incomplete and they are in contact with each other at one or more points called:
(a) synapsis
(b) leptotene
(c) chiasmata ✓
(d) centromere

59. Each bivalent is composed of four chromatids and is known as:
(a) bivalent
(b) bivalent tetrad ✓
(c) synapsis
(d) centromere

60. The homologous chromosomes exchange their parts of chromatid at:
(a) synapsis
(b) leptotene
(c) chiasmata ✓
(d) centromere

61. The exchange of segments of chromatids at chiasmata between the homologous chromosomes is called:
(a) cutting over
(b) taking over
(c) passing over
(d) crossing over ✓

62. During this sub-stage of prophase I, nucleoli and nuclear membrane are disappeared.
(a) diakinesis ✓
(b) diplotene
(c) zygotene
(d) leptotene

63. During this sub-stage of prophase I, chiasmata moves from the centromere towards the ends of the chromosomes like a zipper.
(a) Zygotene
(b) pachytene
(c) diplotene
(d) diakinesis ✓

64. In this phase of meiosis, the bivalent line up at the equatorial plane.
(a) Prophase I
(b) Metaphase I ✓
(c) Anaphase I
(d) Telophase I

65. In this phase of meiosis, chromosomes become uncoil, nucleolus reappears and two daughter nuclei formed.
(a) Prophase I
(b) Metaphase I
(c) Anaphase I
(d) Telophase I ✓

66. In this sub-phase, the spindle fibres are formed; nuclear membrane and the nucleolus disappear.
(a) Prophase II ✓
(b) Metaphase II
(c) Anaphase II
(d) Telophase II

67. The chromosomes are attached to half spindle fibres by their centromere and get arranged at equatorial plane during:
(a) Prophase II
(b) Metaphase II ✓
(c) Anaphase II
(d) Telophase II

68.It maintains chromosomes number constant from generation to generation.
(a) Anaphase I
{b) Anaphase II
(c) Mitosis
(d) Meiosis ✓

69. Meiotic error, where a pair of homologous chromosomes fails to separate from one another called:
(a) non-junction
(b) disjunction
(c) non-disjunction ✓
(d) None of these

70. It produce gametes with abnormal number of chromosomes with less or extra chromosomes.
(a) non-disjunction ✓
(b) crossing over
(c) Karyokinesis
(d) inter-phase

2. Fill in the blanks:

(i) Chromosomes are thread like structures appear at the time of cell division.
(ii) Sequence of changes which occurs between one cell division and the next is called cell cycle.
(iii) The two chromatids are attached to each other at centromere.
(iv) Chromosomes in the cell which are similar to each other in shape and size are called homologous pair.
(v) Chromosomes with one arm very small and other very long called Acrocentric.
(vi) Chromosomes consist of two genetically identical copies of thread called chromatids.
(vii) Period of extensive metabolic activity, in which cell grow, enzymes are synthesizes G1 phase.
(viii) In animal meiosis produces gametes.
(ix) During metaphase homologous chromosomes arrange themselves on the equator of the spindle.
(x) Cell death which is caused by external factor called necrosis.
11. Chromosomes are made up of chromatin material in specific number in Eukaryotic cell.
12. Chromosomes are made up of DNA and histone protein.
13. There are four types of Chromosome i.e Metacentric, Submetacentric Aerocentric and Telocentric.
14. Sequences of change occur between two successive Cell division called cell-cycle.
15. Cell-cycle is mainly consist of two phases i.e cell-division and inter phase.
16. Inter phase is divided further into three sub phases G1, S and G2 phases.
17. Mitosis is the type of cell division, where a parent cell divides into two daughter cells, with same number of chromosomes as the parent cell contain.
18. Meiosis is the type of cell division in which a single cell divides into four daughter cells and number of chromosomes become half of the parent cell.
19. In plant meiosis division takes place in spore mother cells to produce gametes and spores respectively.
20. Meiotic error, where a pair of homologous Chromosomes fails to separate form one another called non disjunction.
21. Non disjunction produce gametes with abnormal number of chromosomes with less or extra chromosomes.
22. Cell-death occur in two ways.
23. Apoptosis is programmed cell death, which help in proper control of development.
24. Necrosis is cell death occur by external factor or accidental cell death.