Cell Cycle & Cell Division PYQs Set 2 (PDF)

Set 2 of 2 · Questions 31-49 of 49

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Mere Teacher · Previous Year Questions NEET Biology · Cell Cycle & Cell Division · Set 2 (Q31-49)
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31. $Bivalent or Tetrad formation is a characteristic feature observed during :$ (1) $Synaptonemal complex in zygotene stage$ (2) $Chiasmata in Diplotene stage$ (3) $Synaptonemal complex in Pachytene stage$ (4) $Chiasmata in zygotene stage$ 32. $A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has:$ (1) $same number of chromosomes but twice the amount of DNA$ (2) $twice the number of chromosomes and four times the amount of DNA$ (3) $four times the number of chromosomes and twice the amount of DNA$ (4) $twice the number of chromosomes and twice the amount of DNA$ 33. $The oocytes of some vertebrates get arrested for years or months in:$ (1) $Diplotene$ (2) $Diakinesis$ (3) $Metaphase - I$ (4) $Telophase - I$ 34. $The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:$ (1) $Bivalent$ (2) $Sites at which crossing over occurs$ (3) $Terminalization$ (4) $Synaptonemal complex$ 35. $Crossing over takes place between which chromatids and in which stage of the cell cycle?$ (1) $Non-sister chromatids of nonhomologous chromosomes at Zygotene stage of prophase I.$ (2) $Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I.$ (3) $Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I.$ (4) $Non-sister chromatids of nonhomologous chromosomes at Pachytene stage of prophase I.$ 36. $The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G_{1} -phase is 8 , what would be the number of chromosomes after S phase?$ (1) $16$ (2) $4$ (3) $32$ (4) $8$ 37. $In prophase I of Meiosis, chromosomes start pairing together and synapsis takes place. This process occurs during which of the following stage?$ (1) $Diplotene$ (2) $Leptotene$ (3) $Zygotene$ (4) $Pachytene$ 38. $The correct sequence of phases of cell cycle is :$ (1) $M\to G_{1} \to G_{2} \to S$ (2) $G_{1} \to G_{2} \to S\to M$ (3) $S\to G_{1} \to G_{2} \to M$ (4) $G_{1} \to S \to G_{2} \to M$ 39. $After meiosis-I, the resultant daughter cell shave:-$ (1) $Same amount of DNA as in the parent cell in S phase$ (2) $Twice the amount of DNA in comparison to haploid gamete.$ (3) $Same amount of DNA in comparison to haploid gamete$ (4) $Four times the amount of DNA in comparison to haploid gamete$ 40. $Which stage of meiotic prophase shows terminalization of chiasmata as its distinctive feature?$ (1) $Leptotene$ (2) $Zygotene$ (3) $Diakinesis$ (4) $Pachytene$ 41. $In meiosis, crossing over and exchange of genetic material between homologous chromosomes are catalyzed by the enzyme.$ (1) $Phosphorylase$ (2) $Recombinase$ (3) $Transferase$ (4) $Polymerase$ 42. $The enzyme recombinase is required at which state of meiosis$ (1) $Pachytene$ (2) $Zygotene$ (3) $Diplotene$ (4) $Diakinesis$ 43. $With respect to metaphase, which of the following statements is incorrect?$ (1) $Complete disintegration of nuclear envelope takes place$ (2) $Chromosomes are highly condensed$ (3) $Metaphase chromosomes are made up of four sister chromatids held together by centromere$ (4) $Chromosomes lie at the equator of the cell$ 44. $At metaphase, the chromosomes are attached to the spindle fibres by their$ (1) $Satellites$ (2) $Secondary constrictions$ (3) $Kinetochores$ (4) $Centromeres$ 45. $In ‘S’ phase of the cell cycle$ (1) $The amount of DNA doubles in each cell.$ (2) $The amount of DNA remains same in each cell.$ (3) $The chromosome number is increased.$ (4) $The amount of DNA is reduced to half in each cell.$ 46. $In 'S' phase of the cell cycle :-$ (1) $Amount of DNA doubles in each cell.$ (2) $Amount of DNA remains same in each cell.$ (3) $Chromosome number is increased.$ (4) $Amount of DNA is reduced to half in each cell.$ 47. $Synapsis occurs between :-$ (1) $Two homologous chromosomes$ (2) $A male and a female gamete$ (3) $mRNA and ribosomes$ (4) $Spindle fibres and centromere$ 48. $Cell in G_{0} -phase$ (1) $Exit the cell cycle$ (2) $Enter the cell cycle$ (3) $Suspend the cell cycle$ (4) $Terminate the cell cycle$ 49. $Spindle fibres attach on to:$ (1) $Telomere of the chromosome$ (2) $Kinetochore of the chromosome$ (3) $Centromere of the chromosome$ (4) $Kinetosome of the chromosome$