Dr. K. K. Gupta, Dr. Preeti Srivastava, Mary Anne Joseph solutions for कन्साइस बायोलॉजी [इंग्रजी] इयत्ता ६ आयसीएसई chapter 3 - Cell – The Structure and Functions [Latest edition]

Put a tick mark (✓) against the correct alternative in the following statement:

Identify the part which contain pigment

Put a tick mark (✓) against the correct alternative in the following statement:

The organelle that controls all activities in

Put a tick mark (✓) against the correct alternative in the following statement:

A cell that is spherical in shape is

Put a tick mark (✓) against the correct alternative in the following statement:

The vacuole contains:

Name the scientist who invented the first microscope.

Who coined the term “cell” ?

Briefly describe the three essential basic parts of a cell

The cell membrane is called selectively permeable. Why?

State the difference between Nucleus and nucleolus

State the difference between cytoplasm and protoplasm

State the difference between cell wall and cell membrane

List the major differences between a plant cell and an animal cell

Briefly discuss the importance of chromosomes to an organism

 Fill up the blank with the terms given below

The ____ is the structural unit of all living things

 Fill up the blank with the terms given below

All cells arise from ______ cells

 Fill up the blank with the terms given below

Animal cells have no cell ______.

 Fill up the blank with the terms given below

Plastids contain ______.

 Fill up the blank with the terms given below

______ are filled with water and dissolved substance.

Try to find the names of four cell organells hidden in this maze, (hint: The hidden words can appear horizontally or vertically; forwards or backward or even mixed up). Write them in the lines provided. For example : “NUCLEUS” in the last row, seven backward letters. 

Fill in the blanks:

Organisms which are made up of a single cell are called ______ organisms.

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Muscles cells are ______ and contractile.

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The jelly-like fluid that surrounds the nucleus of a cell is called ______.

Fill in the blanks:

______ membrane is a selectively permeable membrane.

Fill in the blanks:

The ______ contains a network of thread-like structures called chromatin network.

Fill in the blanks:

Golgi bodies are also called ______.

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 A plant cell gets shape and support from its ______.

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In a plant cell food is manufactured in ______.

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______ give colour to flowers and fruits.

Fill in the blanks:

 Fluid-filled cell organelles that are usually larger in a plant cell than in an animal cell are called ______.

 Match the name of the organelle given in Column A with its function given in Column B.

 Write true or false for each statement. Rewrite the false statements correctly: 

The size of a cell is usually measured in centimetres

 Write true or false for each statement. Rewrite the false statements correctly: 

The nuclear membrane encloses a colourless, dense fluid called nucleoplasm

 Write true or false for each statement. Rewrite the false statements correctly: 

 At the time of cell division the chromatin network changes into small thread-like structures called genes

 Write true or false for each statement. Rewrite the false statements correctly: 

 Ribosomes are the sites of respiration in a cell

 Write true or false for each statement. Rewrite the false statements correctly: 

 A mitochondrion is bound by two membranes

 Write true or false for each statement. Rewrite the false statements correctly: 

Golgi bodies form a network of tubes which run throughout the cytoplasm

 Write true or false for each statement. Rewrite the false statements correctly: 

Every cell is bound by a cell wall

 Write true or false for each statement. Rewrite the false statements correctly: 

 Chromoplasts are the kitchen of the cell

 Write true or false for each statement. Rewrite the false statements correctly: 

Vacuoles are filled with a fluid called nucleoplasm

 Write true or false for each statement. Rewrite the false statements correctly: 

 Growth and reproduction are based on cell division

Write a short answer.

Why is a cell called the structural unit of a living organism?

Write a short answer.

Why is the cell membrane called selectively-permeable membrane?

Where are the genes located in a cell?

Write a short answer.

Why are mitochondria called the powerhouse of the cell?

Define cell division.

Write a short answer.

What is the relationship between growth and cell division?

Why was the invention of the microscope so important to the study of living beings?

What is cell theory? Name the three scientists whose work led to the formulation of the cell theory.