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 Multiple Choice QuestionsMultiple Choice Questions

21.

During mitosis ER and nucleolus begin to disappear at 

  • late prophase

  • early metaphase

  • late metaphase

  • late metaphase

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22.

Which stages of cell division do the following figures A and B represent respectively?

  • Metaphase - Telophase

  • Telophase - Metaphase

  • Late anaphase - Prophase

  • Late anaphase - Prophase

346 Views

23.

In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are

  • n = 7  and x = 21

  • n = 21 and x = 21

  • n = 21  and x = 14

  • n = 21  and x = 14

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24.

What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?

  • 16

  • 24

  • 32

  • 32


B.

24

Synergids are two, short-lived, haploid cells lying close to the egg in nature embryosac of flowering plant ovule. While the endosperm is a triploid tissue formed after triple fusion. Thus, if the synergids have 8 chromosomes, the aleurone layer (part of endosperm) will have just triple of that of chromosomes in the synergids i.e, 24 chromosomes.

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25.

Which of the following options gives the correct sequence of events during mitosis?

  • Condensation - nuclear membrane disassembly
    - crossing over - segregation - telophase

  • Condensation - nuclear membrane disassembly
    -arrangement at equator - centromere
    division - segregation - telophase

  • Condensation - crossing over - nuclear
    membrane disassembly - segregation -
    telophase

  • Condensation - crossing over - nuclear
    membrane disassembly - segregation -
    telophase

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26.

Zygotic meiosis is characteristic of

  • Marchantia

  • Fucus

  • Funaria

  • Funaria

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27.

Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?

  • Chromosomes will not condense

  • Chromosomes will be fragmented

  • Chromosomes will not segregate

  • Chromosomes will not segregate

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28.

DNA replication in bacteria occurs

  • During S-phase

  • Within nucleolus

  • Prior to fission

  • Prior to fission

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29.

Select the incorrect match :

  • Lampbrush – Diplotene bivalents chromosomes

  • Allosomes – Sex chromosomes

  • Polytene chromosomes – Oocytes of amphibians

  • Submetacentric chromosome – L-shaped chromosomes


30.

Which of the following events does not occur in rough endoplasmic reticulum?

  • Protein folding

  • Protein glycosylation

  • Phospholipid synthesis

  • Cleavage of signal peptide


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