Cell Cycle and Cell divisons Set 1

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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Cell Cycle and Cell divisons Set 1

Q1 | The role of mitosis is not merely to divide a cell into two daugher cells but to ensure genetic continuity from one cell generation. The mechanism ensuring genetic continutity is;
  • Formation of two cells with identical DNA
  • The new cells have half the number of chromosomes.
  • Formation of cell by new chromosome
  • Formation of two daughter cells
Q2 | Substances that interface with microtubule function interfare with cell division because....
  • Microtubules are distributed equally in the new cells
  • Microtubules are involved in precise separate set of chromosomes get into each daughter cells.
  • Without microtubules, cytokinesis cannot take place and a membrane is form
Q3 | The stage of mitosis during which the nucleolus disintegrates and chromosomes appear is known as
  • Interphase
  • Metaphase
  • Prophase
  • Anaphase
Q4 | Chromosomes can be counted during :
  • Prophase
  • Metaphase
  • Anaphas
  • Telophase
Q5 | The nuclear membrane disintegrates and spindle appears at :
  • Prometaphase
  • Early prophase
  • Late telophase
  • Late prophase
Q6 | The separation of two chomatids of each chromosome during early anaphase is initiated by :
  • The interaction of centromere with the chromosomal fibres.
  • The elongation of metaphytic spindle
  • Attachment of spindle fibres with Kinetochore
  • All the above
Q7 | The telophase stage of mitosis is…….
  • The last stage of karyokinesis
  • More or less opposite of prophase stage.
  • The stage where spindle fibres are abosorbed in cytoplasm
  • All of the above
Q8 | The term ‘karyokinesis’ is used for….
  • Disappearance of nuclear mimbrane during metaphase
  • Changes occuring at anaphase, when chromosomes move to the opposite poles.
  • Event occuring during interphase
  • Over all changes occurring in nucleus during the cell division.
Q9 | How many mitotic divisions must occur in a cell to form 1024 cells ?
  • 20
  • 10
  • 40
  • 64
Q10 | The difference in the division of a plant cell and animal cell is in.....
  • Cell membrane formation
  • Spindle formation
  • Movement of chromosomes from equatorial plane
  • Coiling of the chromosomes
Q11 | During which phase of prophase-I of meiosis does the process of synapsis occur ?
  • Pachytene
  • Zygotene
  • Leptotene
  • Diplotene
Q12 | In mitosis the daughter cells resemble to their parent cell. But in meiosis they differ not only from parent cell in having half the number of chromosomes, but also differ among themselves qualitatively in genetic constitution due to.....
  • Segragation and crossing over only
  • Independent assortment and segregation only
  • Crossing over, independent assortment and segregation
  • Independent assortment and crossing over only
Q13 | Which is the longest phase of meitoic division ?
  • Prophase-I
  • Metaphase-I
  • Anaphase-I
  • Telophase-I
Q14 | At which stage, the homologous chromosomes separate due to repulsion, but are yet held by chiasmata :
  • Zygotene
  • Pachytene
  • Diplotene
  • Diakinesis
Q15 | If there are four chromosomes present during prophase – I, how many chromosome are there in each cell at the end of anaphase - II
  • 4
  • 8
  • 2
  • 16
Q16 | Meiosis – II is :
  • Cell division
  • Mitotic division
  • Commonly cell elongation
  • Reduction division
Q17 | Significance of meiosis is associated with :
  • DNA duplication
  • Asexual reproduction
  • Sexual reproduction
  • Growth of the body
Q18 | The minimum number of meiotic divisions required to obtain 100 pollen grain of wheat is.....
  • 40
  • 25
  • 150
  • 200
Q19 | The number of meiotic divisions required to produce 400 seeds in a pea plant is.....
  • 200
  • 700
  • 500
  • 400
Q20 | Significance of meiosis.........
  • The number of chromosomes is maintained in all cells.
  • It is important process for evolution
  • Due to division, cell can maintain their efficient size.
  • A very significant contributing of mitosis is cell repair
Q21 | In which of the following matters mitosis and meiosis are similar ?
  • Both are precede by DNA replication
  • Both have pairing of homologous chromosomes
  • Both process occurs in all kinds of cells
  • Both include separation of paired chromosomes.
Q22 | During which of the following phases of mitosis asters appear around the centroles ?
  • Prophase
  • Metaphase
  • Anaphase
  • Telophase
Q23 | During which stage of meiosis crossing over takes place ?
  • Leptotene
  • Zygotene
  • Dikinesis
  • Pachytene
Q24 | At which of the following stage4s of cell cycle proteins and microtubules, required for mitosis, are synthesized ?
  • G2 phase
  • G1 phase
  • Interphase
  • M phase
Q25 | If the initial amout of DNA is denoted as 2C then it increases into :
  • 2C
  • 4C
  • 8C
  • 6C