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.

Q1

Living cells were discovered by

[A]. Robert Hooke
[B]. Purkinje
[C]. Leeuwenhoek
[D]. Robert Brown
Q2

1 μ m is:

[A]. 10^–6 m
[B]. 10^–9 m
[C]. 10^–10 m
[D]. 10^–3 m
Q3

Cell theory was given by

[A]. Schleiden and Schwann
[B]. Virchow
[C]. Hooke
[D]. Haeckel
Q4

Cell arises from pre-existing cell was stated by

[A]. Haeckel
[B]. Virchow
[C]. Hooke
[D]. Schleiden
Q5

Amoeba acquires its food through a process, termed

[A]. Exocytosis
[B]. Endocytosis
[C]. Plasmolysis
[D]. Exocytosis and endocytosis both
Q6

Which out of the following is not a function of vacuole?

[A]. Storage
[B]. Providing turgidity and rigidity to the cell
[C]. Waste excretion
[D]. Locomotion
Q7

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.
Q8

The proteins and lipids, essential for building the cell membrane, are manufactured by

[A]. Endoplasmic reticulum
[B]. Golgi apparatus
[C]. Plasma membrane
[D]. Mitochondria
Q9

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.
Q10

In a quiz competition, you are asked a question where you have to choose the statement which is/ are correct?

[A]. Robert Hooke, in 1665, discovered and name the cells.
[B]. In 1678, Anton von Leeuwenhoek discovered the sperm and identified the sperm cells of humans, dogs, rabbits, frogs, fish and insects.
[C]. In 1831, a Scottish botanist Robert Brown discovered and named the nucleus in plant cells.
[D]. All the above.

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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