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 Multiple Choice QuestionsMultiple Choice Questions

61.

In mitotic cell division, the division of centromere and the division of chromatid occurs between

  • anaphase and telophase

  • prophase and metaphase

  • telophase and interphase

  • anaphase and metaphase


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62.

Spindle chromosomes have

  • centriole

  • kinetochore

  • chromocentre

  • chromomere


B.

kinetochore

As prometaphase ends and metaphase begins, the chromosomes align along the cell equator. Every chromosome has at least two microtubules extending from its kinetochore — with at least one microtubule connected to each pole. At this point, the tension within the cell becomes balanced, and the chromosomes no longer move back and forth. In addition, the spindle is now complete, and three groups of spindle microtubules are apparent. Kinetochore microtubules attach the chromosomes to the spindle pole; interpolar microtubules extend from the spindle pole across the equator, almost to the opposite spindle pole; and astral microtubules extend from the spindle pole to the cell membrane.


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63.

In mitosis the duplication of chromosomes occurs during

  • early prophase

  • late prophase

  • interphase

  • late telophase


64.

Bivalents in meiosis are

  • tetrad

  • pairs of non-homologous chromosomes

  • pairs of several chromatids

  • pairs of homologous chromosomes


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65.

In which stage of the first meiotic division, each chromosome undergoes longitudinal division to give rise to two sister chromatids ? 

  • Zygotene

  • Diplotene

  • Diakinesis

  • Pachytene


66.

Which of the following sequence is a correct one for meiotic cell cycle?

  • GS G M G1

  • G1 G2 G2

  • G2 G1 G2

  • G1 G2 S


67.

Chromosomes replicate in which stage of meiosis?

  • Prophase- I

  • Prophase- II

  • Telophase- I

  • Interphase


68.

In which stage of cell division chromosomes are most condensed

  • Prophase

  • Metaphase

  • Anaphase

  • Telophase


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69.

Which phase comes in between the G1 and G2 phases of cell cycle?

  • M - phase

  • G- phase

  • S - phase

  • Interphase


70.

Cell division cannot be stopped in which phase of the cell cycle?

  • G1- phase

  • G2- phase

  • S- phase

  • Prophase


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