Class 9 Science Chapter 5 MCQ (Multiple Choice Questions) of The Fundamental Unit of Life. All the questions are important and useful for clearing the doubts in chapter 5 of standard 9 science. These questions provide a perfect practice for the preparation of school unit tests or terminal exams. These questions take less time to revise and provide maximum result in exams. So, practice here with MCQs and get good marks in exams.

Class 9 Science Chapter 5 MCQ Online Tests for 2022-2023

Class: 9Science
Chapter: 5The Fundamental Unit of Life
Contents:MCQ Online Tests with Answers

Class 9 Science Chapter 5 MCQ with Answers for 2022-23

Class 9 Science Chapter 5 MCQ Online Test contains about 75 questions in all with answers and explanation. New questions will be added time to time to increase the question bank. All the questions are taken from NCERT Books for 9th Standard Science issued for academic session 2022-2023.


Select the odd one out:

[A]. The movement of water across a semi permeable membrane is affected by the amount of substances dissolved in it.
[B]. Membranes are made of organic molecules like proteins and lipids
[C]. Molecules soluble in organic solvents can easily pass through the membrane.
[D]. Plasma membranes contain chitin sugar in plants

Bikash is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?

[A]. The major constituent of ribosomes is the ribonucleic acid (RNA) and proteins.
[B]. The plant cells contain many freely distributed subunits of Golgi apparatus, called dictyosomes.
[C]. Golgi apparatus is present in bacteria, blue-green algae, mature sperms and red blood cells of mammals and other animals.
[D]. Golgi apparatus is also involved in the synthesis of cell wall, plasma membrane and lysosomes.

In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were correct? Will you be able to answer this question?

[A]. The chromatin material is a thin, thread like intertwined mass of chromosome material and composed of the genetic substance DNA and proteins.
[B]. DNA store all the information necessary for the cell to functions to grow and to reproduce further cells of the next generation.
[C]. Chromosomes are thread like structures usually present in the nucleus that become visible only during cell division.
[D]. All the above.

Lipid molecules in the cell are synthesized by

[A]. Smooth endoplasmic reticulum
[B]. Rough endoplasmic reticulum
[C]. Golgi apparatus
[D]. Plastids

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. Cell wall permits the plant cell to become turgid.
[B]. In plant cells, there occurs a rigid cell wall which lies outside the plasma membrane.
[C]. The plant cell wall, thus, consists of tiny cellulose fibres called microfibrils.
[D]. The cell walls of adjacent cells are glued together by the plasmodesmata.

Organelle other than nucleus, containing DNA is

[A]. Endoplasmic reticulum
[B]. Golgi apparatus
[C]. Mitochondria
[D]. Lysosome

The cell organelle involved in forming complex sugars from simple sugars are

[A]. Endoplasmic reticulum
[B]. Ribosomes
[C]. Plastids
[D]. Golgi apparatus

Pooja is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? She wants to take help from you:

[A]. Human heart has a special type of muscle cell called cardiac muscles.
[B]. Stomach has a special cell such as mucous cells.
[C]. Skeletal muscles are voluntary muscles i.e. their contraction depends on our will or control.
[D]. All the above.

Find out the false sentences

[A]. Golgi apparatus is involved with the formation of lysosomes
[B]. Nucleus, mitochondria and plastid have DNA; hence they are able to make their own structural proteins
[C]. Mitochondria is said to be the power house of the cell as ATP is generated in them.
[D]. Cytoplasm is called as protoplasm

Soni is completed her science chapter where she wrote some statements on cell theory. She wants to know whether the statements are correct or not? She wants to take help from you:

[A]. All organisms are composed of cells and cells products.
[B]. All metabolic reactions take place in cells.
[C]. Every organism starts its life as a single cell.
[D]. Bacteria are an exception to cell theory.

What do understand by Hypertonic solution?

If the medium has a lower concentration of water than the cell, meaning that it is a very concentrated solution, the cell will lose water by osmosis. Such a solution is known as a hypertonic solution.

What is Plasmolysis?

When a living plant cell loses water through osmosis there is shrinkage or contraction of the contents of the cell away from the cell wall. This phenomenon is known as plasmolysis.

Why are Lysosomes known as suicide bags?

During the disturbance in cellular metabolism, for example, when the cell gets damaged, lysosomes may burst and the enzymes digest their own cell. Therefore, lysosomes are also known as the ‘suicide bags’ of a cell.

How does Mitochondria make their own protein?

Mitochondria have their own DNA and ribosomes. Therefore, mitochondria are able to make some of their own proteins.

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