Class 9 Science Chapter 5 MCQ

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 2020-2021

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

Class 9 Science Chapter 5 MCQ with Answers for 2020-21

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 2020-2021.


Which of the following statement is or are correct?

[A]. The vacuolar membrane is typically a single unit member and is often associated with the maintenance of water balance or ingestion of nutrient material.
[B]. In plant cells, the vacuoles are large, distinct and permanent.
[C]. Peroxisomes are specialized for carrying out some oxidative reactions, such as detoxification or removal of toxic substances from the cell.
[D]. All the above.

1 μ m is:

[A]. 10^–6 m
[B]. 10^–9 m
[C]. 10^–10 m
[D]. 10^–3 m


The only cell organelle seen in prokaryotic cell is

[A]. Mitochondria
[B]. Ribosomes
[C]. Plastids
[D]. Lysosomes

Cell arises from pre-existing cell was stated by

[A]. Haeckel
[B]. Virchow
[C]. Hooke
[D]. Schleiden


Silver nitrate solution is used to study

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

Read the following sentences carefully, and choose the correct one(s):

[A]. Plasma membrane permits the entry and exit of some material in the cells.
[B]. Some substances such as carbon dioxide, oxygen, water etc. can move across the plasma membrane through a process called diffusion.
[C]. Diffusion is the spontaneous movement of molecules from a region of high concentration to one of lower concentration, until uniform concentration is finally achieved.
[D]. All the above.


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

[A]. The prokaryotic cells usually range between 1 to 10 micrometers (μm).
[B]. The largest size of an elephant is due to the larger cells present in its body.
[C]. Amoeba proteus is biggest among the unicellular organisms.
[D]. The smallest cells are those of mycoplasma gallisepticum, an organism intermediate between virus and bacteria.

Find out the correct sentence

[A]. Enzymes packed in Lysosomes are made through RER (rough endoplasmic reticulum)
[B]. Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein respectively
[C]. Endoplasmic reticulum is related with the destruction of plasma membrane
[D]. Nucleoid is present inside the nucleoplasm of eukaryotic nucleus


Which of these is not related to endoplasmic reticulum?

[A]. It behaves as transport channel for proteins between nucleus and cytoplasm
[B]. It transports materials between various regions in cytoplasm
[C]. It can be the site of energy generation
[D]. It can be the site for some biochemical activities of the cell

Which of these options are not a function of Ribosomes?

[A]. It helps in manufacture of protein molecules, and It helps in manufacture of enzymes.
[B]. It helps in manufacture of enzymes, and It helps in manufacture of hormones.
[C]. It helps in manufacture of hormones, and It helps in manufacture of starch molecules.
[D]. It helps in manufacture of starch molecules, and It helps in manufacture of protein molecules.
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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