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 Multiple Choice QuestionsMultiple Choice Questions

91.

DNA/chromosome replication takes place during:

  • G1- phase

  • G2- phase

  • S- phase

  • Prophase


92.

The S-phase of cell cycle is characterized by:

  • duplication of chromosome

  • shotening of chromosome

  • duplication of DNA

  • duplicatin of centriole


93.

Chiasmata are most appropriately observed in meiosis during :

  • diakinesis

  • diplotene

  • metaphase II

  • pachytene


94.

Which is synthesized in G1 phase ?

  • DNA polymerase

  • Histones

  • Nucleolar DNA

  • Tubulin protein


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95.

Which of the following maintain the constant number of chromosomes generation after generation?

  • Meiosis

  • Endomitosis

  • Mitosis

  • Amitosis


A.

Meiosis

Meiosis is also known as reduction division. It maintains the constant number of chromosomes generation after generation. It occurs in reproductive cells only and somatic body increases in size through mitotic division.


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96.

During the cell cycle, DNA content is doubled in the

  • G1 phase

  • S phase

  • G2 phase

  • end of M phase


97.

Match the sub-stage of prophase I of meiosis in Column I and the events in Column II and choose the right option.

Column I Column II
A. Leptotene 1. Terminalization of chiasma
B. Zygotene 2. Crossing over and recombination
C. Pachytene 3. Synapsis
D. Diakinesis 4.  Visibility of chromosomes

  • A - 1; B - 2; C - 3; D - 4

  • A - 1; B - 3; C - 2; D - 4

  • A - 4; B - 3; C - 2; D - 1

  • A - 4; B - 1; C - 2; D - 3

  • A - 4; B - 1; C - 2; D - 3


98.

Which one of the following is the significance of mitosis?

  • Restricted to haploid cells

  • Cell repair

  • Increases the genetic variability

  • Recombination of chromosomes

  • Recombination of chromosomes


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99.

In a typical eukaryotic cell cycle, Gap 1, Synthesis and Gap 2 are the three phases included in the

  • Prophase

  • Metaphase

  • Anaphase

  • Interphase

  • Interphase


100.

Find out the correct statement

  • During mitosis endoplasmic reticulum and nucleolus disappear completely at early prophase

  • Chromosomes are arranged along the equator during prophase of mitosis

  • Chromosome is made up of two sister chromatids at anaphase of mitosis

  • A cell plate is laid down during interphase

  • A cell plate is laid down during interphase


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