Cell Concise ICSE Class-9 Biology Solutions Selina Publishers

Chapter-2 Cell The Unit of Life Selina Publishers Concise Biology Solutions

Cell Concise ICSE Class-9 Biology Solutions Selina Publishers. We Provide Solutions of Progress Check , MCQs, Very Short Answer Type, Short Answer Type and Long Answer Type Questions . Selina Publishers Concise Biology for Class 9th ICSE Solutions all questions are solved and explained by expert teachers as per ICSE board guidelines. Visit official Website CISCE  for detail information about ICSE Board Class-9.

Cell Concise ICSE Class-9 Biology Solutions Selina Publishers


–: Select Topics :–

1-Progress Check ,  

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2-Progress Check , 

3-Progress Check ,

4-Progress Check

A. MULTIPLE CHOICE TYPE 

B. VERY SHORT ANSWER TYPE

C.SHORT ANSWER TYPE

D.LONG ANSWER TYPE 

E.STRUCTURED/APPLICATION/SKILL TYPE

  Note :-  Before Viewing Concise Solutions of Chapter-2 Cell The Unit of Life. Read the whole chapter carefully with figure. Focus on Structure of Cell, Endoplasmic Reticulum, Cytoplsm Golgi Body ,Plastid Centrosome and Nucleus.  Chapter-2 Cell The Unit of Life is very important Chapter in ICSE Class 9th biology.


Solutions of Selina Concise Biology Chapter 2 Cell :The Unit of Life  Progress Check-1

Question 1 

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Name the following:

(i) The kind of microscope that consists of a single biconvex lens

(ii) The kind of mirror used for throwing light on the object in Hooke’s microscope

Answer 1

(i) Simple microscope

(ii) Plane mirror

Question-2. 

What is the maximum magnification that can usually be achieved  by:

 (i)a compound microscope ,

 (ii)an electron microscope

Answer 2

(i) 2000 times

(ii) 200,000 times


Progress Check-2 , Solutions of Selina Concise Biology Chapter 2 Cell :The Unit of Life

Question-1.

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Name the following

 (i)Any two one-celled organism

 (ii)The longest cells in animals.

 (iii)Amoeboid cells in humans.

 (iv)Shape of white bloods cells.

 (v)A cell  components which is visible only in cell division stage.

Answer 1 

(i) Amoeba

(ii) nerve cell

(iii) WBCs

(iv) Amoebic

(v) Chromosome

Question-2.

 List three categories of substance which are ensured greater diffusion due to large surface / volume ratio of the cells.

Answer 2

RBCs , Root hair and villi ens tine has last Surface area


 Solutions of Selina Concise Biology Progress Check-3 ,Chapter 2 Cell :The Unit of Life

 Question-1.

Name the part of a cell in which

 (i)many chemical reaction occur with the help of enzymes

 (ii)a network of chromatin fibres occurs.

 (iii)cellulose forms the main components.

Answer 1

(i) mitochondria

(ii) nucleus

(iii) Cell wall

Question 2. 

Different  between 

 (i)an organ and an organelles

 (ii)a plants cell and an animals cell pertaining to the presence of plastids.

Answer 2

(i) Organ:Organ is a group of tissue

(ii) Organelles: Organelles is a part of cell

Question-3.

Name the cell organism concerned with 

(i) Secretion  of enzymes

(ii) Trapping of solar energy

(iii) Synthesis of proteins

(iv) Intracellular   digestion

(v) Production of ATP

Answer 3

(i) Lysosome

(ii) Chloroplast

(iii) Lysosome

(iv) Lysosome

(v) Mitochondria

Question-4.

 Name the cell part which is 

(i) composed of cellulose

(ii) formed of an irregular network of a tubular double membranes

(iii) a clear space with water or other substance and solution

Answer- 4

(i) Cell wall

(ii) Centrist

(iii) Vacuoles

Question-5.

 Mention if the following statements are true or false , suggest the change in the information underline 

(i) Prokaryotic cells have larger ribosomes

(ii) Eukaryotic cells have mitochondria

(iii) Amoeba is an example of  prokaryotes

(iv) Bacteria have no nuclear membrane but possess chloroplast

Answer 5

(i) False

(ii) True

(iii) False

(iv) False


 Solutions of Progress Check-4 of Selina Concise Biology Chapter 2 Cell :The Unit of Life

Question-1

 Column I list a few activities of living organism and column ll the activity of cell related to them . Match the items in the two columns

  Column l
(Activity of organism )
 Column ll
 (Activity of cells)
(i) Repair  (a) Contractility of cells
(ii) Cooling   (b) Cells devour germs
(iii) Movements    (c) Cell division
(iv) Protection from disease  (d)  Gland cells give out sweet for  evaporation

                                                     

Answer 1

 

 Column l
(Activity of organism )
 Column ll
 (Activity of cells)
(i) Repair (c) Cell Division
(ii) Cooling (d) Gland cells give out sweet for evaporation
(iii) Movements (a) Contractility of cell
(iv) Protection from disease (b) Cell devour germs

 

Question-2 .

 Which cells organelle is the key to the life of the cell.?

Answer 2

Nucleus

Question-3.

 How do you say that a cell also has a life span and death like an organism ? Give one example.

Answer 3

Cell division

Question-4.

 All organism excrete. Dose an individual cell also do it ? Give one example 

Answer 4

yes, Carbon dioxide are released

Question-5 .

 Every organism needs food. Does a cell also need it? Explain very briefly

Answer 5

Yes, Glucose needed in mitochondria


Review Questions  of Selina Concise Solutions Chapter-2 Cell: The Unit of Life

A. MULTIPLE CHOICE TYPE 

Question-1

Which one of the following cell organelles is correctly matched with its function?

(a) Ribosomes  Synthesis of proteins

(b) Mitochondria  Secretion of enzymes

(c) Plasma membrane  Freely permeable

(d) Centrosome Carries genes

Answer 1

(a) Ribosomes Synthesis of proteins

Question-2

All life starts as

(a) an egg

(b) a single cell

(c) a gene

(d) a chromosome

Answer 2

2. (b) a single cell

Question-3

Which one of the following is found both in the cells of a mango plant and a monkey?

(a) chloroplasts

(b) centrioles

(c) cell wall

(d) cell membrane

Answer 3

3. (d) cell membrane

Question-4

A plant cell can be identified from an animal cell by the

(a) absence of centrosome

(b) presence of cell membrane

(c) presence of vacuoles

(d) none of the above

Answer 4

  (a) absence of centrosome

Question-5

Plant cell has a cell wall made of

(a) Protein

(b) Fructose

(c) Cellulose

(d) Fatty acids

Answer 5

 (c) Cellulose

Question-6

The cell organelle that helps in respiration of the cell is

(a) Mitochondria

(b) Lysosome

(c) Ribosome

(d) Centrosome

Answer 6

(a) Mitochondria


B . VERY SHORT ANSWER TYPE of Chapter-2 Cell: The Unit of Life Selina Concise Biology Solution for ICSE Board Class 9th

 

Question- 1. 

Name the part of the cell concerned with the following.

(a) Liberation of energy

(b) Synthesis of proteins

(c) Transmission of hereditary characters from parents to offspring

(d) Initiation of cell division

(e) Hydrolysis in function

(f) Entry of only certain substances into and out of the cell

Answer 1

(a) Mitochondria

(b) Ribosomes

(c) Chromosomes

(d) Centrosome

(e) Lysosomes

(f) Cell membrane

Question 2

State whether the following statements are true (T) or false (F):

(a) All animal cells contain a cell wall. T/F

(b) A cell wall is made up of protein. T/F

(c) Centrosome occurs in animal cells. T/F

(d) Plant cells contain large vacuoles. T/F

(e) Protoplasm is the part of the cell which surrounds the nucelus. T/F

(f) Genes are located in chromosomes. T/F

(g) Anthocyanins are the pigments of flowers, which are dissolved in cell-sap. T/F

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