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.

Q1

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.
Q2

Lysosome arises from

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




Q3

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

[A]. Endoplasmic reticulum provides a pathway for the distribution of nuclear material from one cell to the another.
[B]. Certain enzymes present in smooth endoplasmic reticulum, synthesize fats (lipids), steroids and cholesterol.
[C]. Rough ER is concerned with the transport of proteins which are synthesized by ribosomes on their surface.
[D]. Smooth endoplasmic reticulum (SER) which contains ribosomes and is meant for secreting lipids.
Q4

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.




Q5

Amoeba acquires its food through a process, termed

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

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.



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 undefined nuclear region of prokaryotes is also known as

[A]. Nucleus
[B]. Nucleolus
[C]. Nucleic acid
[D]. Nucleoid



Q9

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
Q10

A cell will swell up if

[A]. The concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium
[B]. The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell
[C]. The concentration of water molecules is same in the cell and in the surrounding medium
[D]. Concentration of water molecules does not matter
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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