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Karnataka Board PUCPUC Science Class 11

Label the diagram and also determine the stage at which this structure is visible.

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Question

Label the diagram and also determine the stage at which this structure is visible.

Diagram
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Solution

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Chapter 10: Cell Cycle and Cell Division - Exercises [Page 52]

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NCERT Exemplar Biology Exemplar [English] Class 11
Chapter 10 Cell Cycle and Cell Division
Exercises | Q 3. | Page 52

RELATED QUESTIONS

What is the average cell cycle span for a mammalian cell?


Distinguish cytokinesis from karyokinesis.


What is G0 (quiescent phase) of cell cycle?


Name the phase of the cell cycle at which the following event occurs:

Crossing over between homologous chromosomes takes place.


Analyse the events during every stage of cell cycle and notice how the following two parameters change.

  1. Number of chromosomes (N) per cell
  2. Amount of DNA content (C) per cell

The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of Mitosis if the number of chromosomes in G1 phase is 8, what would be the number of chromosomes after the S phase?


Between a prokaryote and a eukaryote, which cell has a shorter cell division time?


Which of the phases of cell cycle is of longest duration?


It is said that the one cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of cell cycle?


While examining the mitotic stage in a tissue, one finds some cells with 16 chromosomes and some with 32 chromosomes. What possible reasons could you assign to this difference in chromosome number. Do you think cells with 16 chromosomes could have arisen from cells with 32 chromosomes or vice versa?


Two key events take place, during S phase in animal cells, DNA replication and duplication of centriole. In which parts of the cell do events occur?


Name the phase of the cell cycle at which the following event occurs:

Chromosomes are moved to spindle equator.


Name the phase of the cell cycle at which the following event occurs:

Centromere splits and chromatids separate.


Name the phase of the cell cycle at which the following event occurs:

Pairing between homologous chromosomes takes place.


Following are the stages of cell division:

  1. Gap 2 phase
  2. Cytokinesis
  3. Synthesis phase
  4. Karyokinesis
  5. Gap 1 phase

Choose the correct sequence of stages from the options given below:


Statement I: During GO phase of cell cycle, the cell is metabolically inactive.

Statement II: The centrosome undergoes duplication during S phase of interphase.

In the light of the above statements, choose the most appropriate answer from the options given below:


Match List I with List II:

List I List II
A. M Phase I. Proteins are synthesised
B. G Phase II. Inactive phase
C. Quiescent stage III. Interval between mitosis and initiation of DNA replication
D. G, Phase IV. Equational division

Choose the correct answer from the options given below:


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