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Selina solutions for Concise Biology Class 10 Icse chapter 2 - Structure of chromosome, cell cycle and cell division [Latest edition]

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Concise Biology Class 10 Icse - Shaalaa.com

Chapter 2: Structure of chromosome, cell cycle and cell division

Multiple choice typeVery short answer typeShort answer typeLong answer typeStructured/Application/Skill type

Selina solutions for Concise Biology Class 10 Icse Chapter 2 Structure of chromosome, cell cycle and cell division Exercise Multiple choice type [Page 19]

Multiple choice type | Q 1 | Page 19

The Chromatin material is formed forms of

  • DNA only

  • DNA and Histones

  • Histones only

  • Nucleotides

Multiple choice type | Q 2 | Page 19

The term “chromosomes” literally means

  • Inherited bodies

  • Twisted threads

  • Coloured bodies

  • Shining threads

Multiple choice type | Q 3 | Page 19

The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in

  • only testis

  • only ovary

  • both ovary and testis

  • all body cells

Multiple choice type | Q 4 | Page 19

In which one of the following options the two stages of mitosis have been given in correct sequence?

  • Prophase, metaphase, telophase, anaphase

  • Prophase, metaphase, anaphase, telophase

  • Anaphase, telophase,  prophase, metaphase

  • Telophase, anaphase, prophase, metaphase

Multiple choice type | Q 5 | Page 19

Synthesis phase in the cell cycle is called so for the synthesis of more of

  • RNA

  • RNA and proteins

  • DNA

  • Glucose

Selina solutions for Concise Biology Class 10 Icse Chapter 2 Structure of chromosome, cell cycle and cell division Exercise Very short answer type [Page 19]

Very short answer type | Q 1.1 | Page 19

Name the repeating components of each DNA strand lengthwise.

 

Very short answer type | Q 1.2 | Page 19

Name the complex consisting of DNA strand and a core of histones.

Very short answer type | Q 1.3 | Page 19

Name the type of bond which joins the complementary nitrogenous bases. 

Very short answer type | Q 1.4 | Page 19

Name the three components of a nucleotide. 

Very short answer type | Q 2 | Page 19

Imagine one cell (A) has undergone one mitotic division and another cell (B) has completed
its meiotic division. How many cells would the two produce? 

Very short answer type | Q 3 | Page 19

Match the events given in column A with the phase in mitotic cell division in column B 

  Column ‘A’   Column ‘B’
1 Chromosomes get arranged in a
horizontal plane at the equator.
a Prophase
2 Daughter chromosomes move to
the opposite poles of a spindle
b Anaphase 
3 Chromosomes become visible as
fine long threads. 
c Metaphase 
4 Chromosomes lose their
distinctiveness and gradually
become transformed into a
chromatin network.
Telophase
Very short answer type | Q 4.1 | Page 19

Fill in the blank.

DNA replicates in the ............. of the cell cycle.  

Very short answer type | Q 4.2 | Page 19

Fill in the blank: 

Mitosis occurs in our ______ cells

Very short answer type | Q 4.3 | Page 19

Fill in the blank : 

Mitosis produces two daughter cells whereas meiosis produces ______ daughter cells.

Very short answer type | Q 4.4 | Page 19

Fill in the blank 

Meiosis occurs only in __________ cells.

Very short answer type | Q 4.5 | Page 19

Fill in the blank :

Humans have 46 chromosomes: Their sperms and eggs will have ______ chromosomes each. 

Very short answer type | Q 4.6 | Page 19

Fill in the blank: 

During the pairing of chromosomes in meiosis, the ________ chromosomes come to lie side by side.

Selina solutions for Concise Biology Class 10 Icse Chapter 2 Structure of chromosome, cell cycle and cell division Exercise Short answer type [Pages 19 - 20]

Short answer type | Q 1 | Page 19

What is the difference between chromatin fibre and chromosome? 

Short answer type | Q 2 | Page 19

What are the rungs of the “DNA ladder” made of? 

 

Short answer type | Q 3.1 | Page 19

Correct the following statements if there is any mistake.  

The four nitrogenous bases in the DNA are Guanine, Thiamine, Adrenaline and Cytosine. 

Short answer type | Q 3.2 | Page 19

Correct the following statements if there is any mistake. 

Genes are specific sequences of bases on a chromosome .

Short answer type | Q 3.3 | Page 19

Correct the following statements if there is any mistake. 

A nucleotide is composed of a sulphate, a sugar (pentose) and a nitrogenous base .

Short answer type | Q 3.4 | Page 19

Correct the following statements if there is any mistake

Nucleosomes are groups of cysteine molecules surrounded by DNA strands

Short answer type | Q 3.5 | Page 19

Correct the following statements if there is any mistake. 

If there are 46 chromosomes in a cell there will be 23 chromatin fibres inside the nucleus during interphase.

Short answer type | Q 4.1 | Page 20

State the difference between: 

Chromosome and chromatid:

Short answer type | Q 4.2 | Page 20

State the difference between: 

Centrosome and centromere: 

Short answer type | Q 4.3 | Page 20

State the difference between: 

Aster and spindle fibres 

Short answer type | Q 4.4 | Page 20

State the difference between:  

Haploid and diploid: 

Short answer type | Q 5 | Page 20

“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement? 

Short answer type | Q 6 | Page 20

“Gametes must be produced by meiosis for sexual reproduction”. Why is it so? 

Short answer type | Q 7.1 | Page 20

Mention whether the following statement is (T) Or (F). Give reason in support of your answer. 

As you grow from childhood to adulthood, your skin cells divide only to replace such cells that are lost from the surface.

  • True

  • False

Short answer type | Q 7.2 | Page 20

Mention whether the following statement is (T) Or (F). Give reason in support of your answer. 

The unfertilized human egg has half the number of chromosomes of the body cells. 

  • True

  • False

Short answer type | Q 7.3 | Page 20

Mention whether the following statement is (T) Or (F). Give reason in support of your answer. 

Nuclear membrane in mitotically dividing cells remains intact up to the metaphase and disappears only in the telophase. 

  • True

  • False

Short answer type | Q 7.4 | Page 20

Mention whether the following statement is (T) Or (F). Give reason in support of your answer. 

Mitotic cell division can be a mode of reproduction. 

  • True

  • False

Short answer type | Q 7.5 | Page 20

Mention whether the following statement is (T) Or (F). Give reason in support of your answer.  

Crossing over between chromatids can occur only between homologous chromosomes. 

  • True

  • False

Selina solutions for Concise Biology Class 10 Icse Chapter 2 Structure of chromosome, cell cycle and cell division Exercise Long answer type [Page 20]

Long answer type | Q 1 | Page 20

What are chromosomes?

Long answer type | Q 2 | Page 20

What are genes? 

Long answer type | Q 3.1 | Page 20

Enumerate the various changes that occur in the nucleus of the cell during  prophase.

Long answer type | Q 3.2 | Page 20

Enumerate the various changes that occur in the nucleus of the cell during anaphase of mitotic division.

Long answer type | Q 4 | Page 20

Name and explain the various stages of the cell cycle.

Long answer type | Q 5 | Page 20

Why is meiosis referred to as 'reductional division'?

Selina solutions for Concise Biology Class 10 Icse Chapter 2 Structure of chromosome, cell cycle and cell division Exercise Structured/Application/Skill type [Pages 20 - 21]

Structured/Application/Skill type | Q 1 | Page 20

Given below is a schematic diagram of a portion of DNA  

  

(a) How many strands are shown in the pic?
(b) How many nucleotides have been shown in each strand?
(c) Name the parts numbered 1, 2, 3, 4 and 5 respectively.
(d) Name the DNA unit constituted by the parts 1, 2, 3 collectively.

Structured/Application/Skill type | Q 2 | Page 20

The three sketch (A, B and C) are intended to represent the replication of DNA. What should
be their correct sequence starting with the first and ending with the last? …… 

 

 

Structured/Application/Skill type | Q 3 | Page 20

The diagram below represents a stage during cell division. Study the same and then answer the question that follow: 

 

a) Name the parts labelled 1, 2, and 3.
b) Identify the above stage and give a reason to support your answer.
c) Mention where in the body this type of cell division occurs.
d) Name the stage prior to this stage and draw a diagram to represent the same. 

Structured/Application/Skill type | Q 4 | Page 20

Draw a labelled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosomes. 

Structured/Application/Skill type | Q 5 | Page 20

The diagram given below represents a certain phenomenon which occurs during meiosis. Name and explain the phenomenon by using the terms – homologous chromosomes, chromatids, crossing over. 

 

 

Structured/Application/Skill type | Q 6 | Page 21

Given below is a diagram representing a stage during mitotic cell division in an animal cell examine it carefully and answer the questions which follow. 

 

a) Identify the stage. Give one reason in support of your answer.
b) Name the cell organelle that forms the ‘aster’
c) Name the parts labelled 1, 2 and 3.
d) Name the stage that follows the one shown above, how is that stage identified?
e) Mention two differences between mitosis and meiosis with regards to:
(i) The number of daughter cells produced.
The chromosome number in the daughter cells.

Structured/Application/Skill type | Q 7 | Page 21

Given below are three diagrammatic sketches (A, B and C) of one and the same particular phase during mitotic type of cell division.

 (a) Identify the phase
(b) What is the diploid number of chromosomes shown in them?
(c) Identify whether these are animal cells or plant cells?
(d) Which of these is/are shown in correct direction?
(i) Only A
(ii) Only B
(iii) Only A and C
(iv) All the three

Structured/Application/Skill type | Q 8 | Page 21

Shown below are four stages (A, B, C, D) (not in sequence) of a certain kind of cell division. 

 

(a) Is it a plant cell or an animal cell? Give two reasons ___
(b) Is it undergoing mitosis or meiosis?
(c)What should be the correct sequence of these four stages among themselves?
(d) Name the stage that should precede the earliest of these stages
(e)Draw the stage names above inside the blank space provided.

Structured/Application/Skill type | Q 9.1 | Page 21

Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the question that follow.

Is it a plant cell or an animal cell? Give a reason to support your answer.

Structured/Application/Skill type | Q 9.2 | Page 21

Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the questions that follow.

Identify the stage shown.

Structured/Application/Skill type | Q 9.3 | Page 21

Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the question that follow.

Name the stage that follows the one shown here. How is that stage identified?

Structured/Application/Skill type | Q 9.4 | Page 21

Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the question that follow.

How will you differentiate between mitosis and meiosis on the basis of the chromosome number in the daughter cells?

Structured/Application/Skill type | Q 9.5 | Page 21

Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the question that follow.

Draw a duplicated chromosome and label its parts.

Chapter 2: Structure of chromosome, cell cycle and cell division

Multiple choice typeVery short answer typeShort answer typeLong answer typeStructured/Application/Skill type
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Concise Biology Class 10 Icse - Shaalaa.com

Selina solutions for Concise Biology Class 10 Icse chapter 2 - Structure of chromosome, cell cycle and cell division

Selina solutions for Concise Biology Class 10 Icse chapter 2 (Structure of chromosome, cell cycle and cell division) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Concise Biology Class 10 Icse solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Concise Biology Class 10 Icse chapter 2 Structure of chromosome, cell cycle and cell division are Cell Division and Cell Cycle, Significance of Mitosis, Significance and Major Differences Between Mitotic and Meiotic Division, Meiosis as a Reduction Division, Homologous Chromosomes, Mitosis and Its Stages., Crossing Over Leading to Variations, Structure of Chromosome, Chromatin, Chromatid, Gene Structure of DNA , RNA, Centromere, Chromosomes - Basic Structure, Number.

Using Selina Class 10 solutions Structure of chromosome, cell cycle and cell division exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 10 prefer Selina Textbook Solutions to score more in exam.

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