Selina solutions for Concise Biology [English] Class 9 ICSE chapter 2 - Cell : The Unit of Life [Latest edition]

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

All life starts as _________. 

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

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

A plant cell has a cell wall made of :

The cell organelle that helps in the respiration of the cell is :

Name the part of the cell concerned with the following :

Liberation of energy

Name the part of the cell concerned with the following :

Synthesis of proteins 

Name the part of the cell concerned with the following :

Transmission of hereditary characters from parents to offspring

Name the part of the cell concerned with the following :
Initiation of cell division

Name the part of the cell concerned with the following:

Hydrolytic in function

Name the part of the cell concerned with the following :
The entry of only certain substances into and out of the cell.

State whether the following statement is true (T) or False (F): 

All animal cells contain a cell wall.

State whether the following statement is true (T) or False (F):  

The cell wall is made of protein.

State whether the following statement is true (T) or False (F): 

Centrosome occurs in animal cells.

State whether the following statement is true (T) or False (F): 

Plant cells contain large vacuoles.

State whether the following statement is true (T) or False (F): 

Protoplasm is the part of the cell which surrounds the nucleus.

State whether the following statement is true (T) or False (F): 

Anthocyanins are the pigments of flowers, which are dissolves in cell-sap.

State whether the following statement is true (T) or False (F):

Genes are located on a chromosome.

How many chromosome pairs are found in human cells? 

What is the name of the chemical substance which constitutes the genes? 

Match the item in column 'A' with those in column 'B'.

_________ consists of membranous sacs and secrets 40 types of digestive enzymes. 

________ is surrounded by microtubules, located near the nucleus. 

Fill in the blanks :

Very thin flexible, a living membrane which is differentially permeable, is called__________.

Fill in the blanks : 

More than a thousand chromosomes are found in the nucleus of certain _______.

Fill in the blanks : 

_______ are hereditary units.

Fill in the blanks :

__________ is a plastid which stores starch.

It is said that the protoplasm cannot be analyzed chemically. Why?

What is the difference between an organ and an organelle?

Do you think the cells of an elephant would be larger than the cells of a rat? Explain briefly.

Distinguish between the following pair of terms:

Protoplasm and cytoplasm

Distinguish between the following pairs of terms :

Nucleolus and nucleus

Distinguish between the following pairs of terms : 

Centrosome and chromosome

Distinguish between the following pairs of science :
Cell wall and cell membrane

Distinguish between the following pairs of terms :

Plant cell and animal cell  

Distinguish between the following pairs of science :
Prokaryotes and eukaryotes

Mention three features found only in plant cells and one found only in animal cells.

Why are the cells generally of a small size?

What is the cell theory? Who propounded it and when?

Mention any three differences between a living cell and a brick in a wall.

Name the plastid and pigment likely to be found in the cells of :

State the major function of the following : 

Plasma membrane

State the major function of the following : 
Ribosome

State the major function of the following : 

Lysosomes

State the major function of the following : 

Mitochondria: 

State the major function of the following : 

Golgi apparatus

State the major function of the following :

Cytoplasm: 

State the major function of the following : 
Asters of centrosome: 

State the major function of the following : 

Chromosomes: 

State the major function of the following : 

Glycogen granule

State the major function of the following : 
Vacuoles

List any six features found both in plant and animal cells.

Given below are the sketches of two types of cells A and B.

(a) Which one of these is a plant cell? Give reasons in support of your answer.

(b) List the cell structures which are common to both types.

(c) Name the structures found only in plant cells and those found only in animal cells.