NCERT Solutions for Class 11 Biology Chapter 10

Cell Cycle and Cell Division Class 11

Chapter 10 Cell Cycle and Cell Division Exercise Solutions

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Exercise : Solutions of Questions on Page Number : 171

Q1 :  

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


Answer :

The average cell cycle span for a mammalian cell is approximately 24 hours.

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Q2 :  

Distinguish cytokinesis from karyokinesis.


Answer :

Cytokinesis 

Karyokinesis 

(i)

Cytokinesis is the biological process involving the division of a cell's cytoplasm during mitosis or meiosis.

(i)

Karyokinesis is the biological process involving the division of a cell's nucleus during mitosis or meiosis.

(ii)

Stages such as prophase, metaphase, anaphase, and telophase are not present in cytokinesis.

(ii)

It is divided into four stages –prophase, metaphase, anaphase, and telophase

 

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Q3 :  

Describe the events taking place during interphase.


Answer :

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Q4 :  

What is G0(quiescent phase) of cell cycle?


Answer :

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Q5 :  

Why is mitosis called equational division?


Answer :

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Q6 :  

Name the stage of cell cycle at which one of the following events occur:

(i) Chromosomes are moved to spindle equator

(ii) Centromere splits and chromatids separate

(iii) Pairing between homologous chromosomes takes place

(iv) Crossing over between homologous chromosomes takes place


Answer :

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Q7 :  

Describe the following:

(a) synapsis (b) bivalent (c) chiasmata

Draw a diagram to illustrate your answer.


Answer :

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Q8 :  

How does cytokinesis in plant cells differ from that in animal cells?


Answer :

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Q9 :  

Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.


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Q10 :  

Distinguish anaphase of mitosis from anaphase I of meiosis.


Answer :

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Q11 :  

List the main differences between mitosis and meiosis.


Answer :

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Q12 :  

What is the significance of meiosis?


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Q13 :  

Discuss with your teacher about

(i) haploid insects and lower plants where cell-division occurs, and

(ii) some haploid cells in higher plants where cell-division does not occur.


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Q14 :  

Can there be mitosis without DNA replication in S phase?


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Q15 :  

Can there be DNA replication without cell division?


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Q16 :  

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

(i) Number of chromosomes (N) per cell

(ii) Amount of DNA content (C) per cell


Answer :

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<< Previous Chapter 9 : Biomolecules Next Chapter 11 : Transport in Plants >>

Biology : CBSE NCERT Exercise Solutions for Class 11th for Cell Cycle and Cell Division will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

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