Microorganisms Friend And Foe Test

Result

Microorganisms Friend And Foe Test - 23

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Weekly Quiz Competition

Question 1
1 / -0

Mark the incorrect statement

A
Microbes help in cleaning the environment

B
Microbes used to deposit the smelly and harmful substance

C
Both A and B

D
None of these

Solution

Micro - organisms decompose dead organic waste of plants and animals converting them into simple substances. These substances are again used by other plants and animals.
Question 2
1 / -0

In the rainy season, moist bread gets spoilt and its surface gets covered with greyish-white patches. It is due to

A
Micro-organisms

B
Herbivores

C
Rusts

D
None

Solution

Micro-organisms are organisms around us that are visible under the microscope but invisible to the naked eyes. They can cause many diseases in humans and animals. It can also cause harm to bread (Mucor) or disease in plants like smuts, rusts etc.
So, the correct answer is 'Micro-organisms'
Question 3
1 / -0

Pasteurized milk can be consumed without boiling because:

A
It is free from enzymes

B
It is free from microbes

C
It is free from preservatives

D
Both A and B

Solution

Pasteurization is a method to preserve milk, in which the milk is heated to about 700C for 15 to 30 seconds and then suddenly chilled and stored. By doing so, it prevents the growth of microbes. This process was discovered by Louis Pasteur.
As pasteurized milk is devoid of microbes it can be consumed directly.
Question 4
1 / -0

Mark the correct statement
a) Microbes can only survive in cold climates
b) Microbes are found inside the bodies of animals
c) Microbes can grow on other organisms

A
a, b, c

B
a, b

C
a, c

D
b, c

Solution

Microbes can survive under all types of environments, ranging from ice-cold climate to hot springs and deserts to marshy lands. They are also present in animal bodies that include humans. Microbes can grow on other organisms.
So, the correct option is D
Question 5
1 / -0

Microbes are classified into ______ major groups.

A
4

B
3

C
2

D
1

Solution

Microbes are classified into 4 major groups namely bacteria, fungi, protozoa, and algae. Thus, the correct answer is option A.
Question 6
1 / -0

Mark the correct statement.

A
Microbes are only harmful to our body.

B
Microbes are only useful to our body.

C
Microbes can be both useful and harmful to our body.

D
Microbes can neither be useful nor harmful to our body.

Solution

Microbes can be both harmful and useful to humans. Some microbes are beneficial while some are harmful and cause disease. For example, yeast is a fungus that is used to make bread rise and give it flavor whereas, athleteʼs foot is caused by another type of fungus.
So, the correct answer is option C.
Question 7
1 / -0

When a plant or animal dies it

A
Leaves behind nutrients

B
Leaves behind energy

C
Leaves behind nothing

D
Both A and B

Solution

When a plant or animal dies, it leaves behind nutrients and energy in the organic material that formed its body structure. Decomposers eventually convert all organic matter into carbon dioxide and nutrients.
Question 8
1 / -0

Mark the correct statement

A
Microbes spoil leather

B
Microbes spoil clothing

C
Microbes spoil food

D
All of theses

Solution

Some microbes are harmful. They cause diseases in human beings, plants and animals. Such disease causing organisms are known as pathogens.
Question 9
1 / -0

Micro organisms include
(a) bacteria (b) viruses (c) protozoa (d) algae

A
a, b, c, d

B
a, b

C
b, c

D
a, c
Solution
An organism that can be seen only through a microscope is called a microorganism.
Micro-organisms include single-celled organisms like bacteria (Vibrio sp.), protozoans (Amoeba, Entamoeba) as well as unicellular/multicellular algae (Chlamydomonas, Spirogyra) and fungi (Saccharomyces, Mucor), etc.
So, the correct answer is 'a, b, c, d'.
Question 10
1 / -0

Disease-causing microbes are called:

A
Gut flora

B
Pathogens

C
Microorganisms

D
Fungi

Solution

Some of the microbes cause diseases in human beings, plants, and animals. Such disease-causing microbes are called pathogens.
So, the correct answer is option B.

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Re-Attempt Weekly Quiz Competition

Microorganisms Friend And Foe Test - 23

Result

Microorganisms Friend And Foe Test - 23

Score

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Rank

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SHARING IS CARING

Question 1

Microbes help in cleaning the environment

Microbes used to deposit the smelly and harmful substance

Both A and B

None of these

Solution

Question 2

Micro-organisms

Herbivores

Rusts

None

Solution

Question 3

It is free from enzymes

It is free from microbes

It is free from preservatives

Both A and B

Solution

Question 4

a, b, c

a, b

a, c

b, c

Solution

Question 5

4

3

2

1

Solution

Question 6

Microbes are only harmful to our body.

Microbes are only useful to our body.

Microbes can be both useful and harmful to our body.

Microbes can neither be useful nor harmful to our body.

Solution

Question 7

Leaves behind nutrients

Leaves behind energy

Leaves behind nothing

Both A and B

Solution

Question 8

Microbes spoil leather

Microbes spoil clothing

Microbes spoil food

All of theses

Solution

Question 9

a, b, c, d

a, b

b, c

a, c

Solution

Question 10

Gut flora

Pathogens

Microorganisms

Fungi

Solution

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