Unit 4: Cell Cycle — Mcqs

9th Class Biology · Unit 4: Cell Cycle

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1.In which phase of cell cycle, maximum growth occurs in cell?

2.In which phase of cell cycle, the chromosomes duplicate?

3.At which stage of mitosis chromosomes line up in the centre?

4.If you observe a cell in which nuclear membrane is reforming around two sets of chromosomes, what stage of cell cycle is this?

5.How does the centrosome contribute to mitosis?

6.Centrosomes make mitotic spindle in;

7.An organism has 4 pairs of chromosomes. After meiosis-1, how many chromosomes and chromatids will be present in each daughter cell?

8.Which one is the feature of mitosis but not of meiosis II?

9.Which event is unique to meiosis but not mitosis?

10.Why is meiosis II necessary after meiosis I?

Cell cycle

11.Substance and energy required for replication for DNA is accumulated in cell during:

Mitosis

12.During cell division spindle fibres attach a chromosome at:

13.Some student of SSC observed a thin cross section from root tip of onion plant under the microscope. They found dividing cells at different stages of their life cycle. One of the students found a cell at late prophase and counted 28 chromosomes in it. The number of chromosomes in daughter cells should be:

14.The spindle apparatus of plants differs from that of animals in not having:

Meiosis

15.Crossing over results in genetic recombination. It occurs between:

16.The cell shown in this diagram is passing through:

17.The longest phase of meiosis is:

18.What causes the number of chromosomes to reduce to half when a cell divides by meiosis?

19.Chromosomal number of fruit fly is 8. The gametes of fruit fly contain:

20.All of the following event takes place both in mitosis and meiosis except: