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Microorganisms

Total questions: 26

Worksheet time: 13mins

Name
Class
Date
1.

____________ are microscopic organisms that are not visible to the naked eye and can be seen only using an instrument called a microscope.

a)

Earthworm

b)

Microorganisms

c)

Cockroach

d)

House fly

2.

The study of microorganisms is known as _________.

a)

Entomology

b)

Zoology

c)

Microbiology

d)

Ornithology

3.

A _____________ is an instrument which is used to observe small objects by forming their magnified images with the help of lenses and light.

a)

Spectacles

b)

Glasses

c)

Mobile

d)

Microscope

4.

Microorganisms can be divided into five types.

a)

True

b)

False

5.

Bacteria are ______________ microorganisms

a)

Unicellular

b)

Multicellular

c)

None of these

6.

What is the shape of cocci?

a)

Spherical in shape

b)

Rod-shaped

c)

Spiral in shape

d)

Curved or comma shsped

7.

Bacteria can withstand extreme _____________ temperature?

a)

Very hot

b)

Very cold

c)

Both

d)

None of these

8.

Ameaba, euglena and paramecium are example of__________

a)

Bacteria

b)

Protozoa

c)

Fungi

d)

Algae

e)

Virus

9.

____________ is used in baking industries for making breads

a)

Yeast

b)

Wheat

c)

Barley

d)

Rice

10.

This prosses of converting sugar into alcohol is known as

a)

Fermentation

b)

Preservation

c)

Infection

d)

Nitrogen fixation

11.

Microorganisms are used to__________.

a)

Food industry

b)

Medical science

c)

Agriculture

d)

All of these

12.

medicines which are manufactured by growing specific microorganisms to cure various diseases are called antibiotics.

a)

True

b)

False

13.

Pores in bread formed by bubbles of_______________.

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

None of these

14.

_____________ are preparations of weekend or killed disease– causing microorganisms.

a)

Vaccine

b)

Antibiotics

c)

Poison

d)

None of these

15.

The process by which nitrogen in the atmosphere is converted into compounds which can be used by plants is called.

a)

Fermentation

b)

Preservation

c)

Conservation

d)

Nitrogen fixation

16.

This is not root with nodules?

a)

True

b)

False

17.

What cycle is this?

a)

Water cycle

b)

Recycle

c)

Nitrogen cycle

d)

Plant cycle

18.

Disease– causing microorganisms are called ____.

a)

Pathogens

b)

Germs

c)

Infectious agents

d)

All of these

19.

____________ are diseases that cannot be transmitted from one person to another.

a)

Non-communicable disease

b)

Communicable disease

c)

None of these

20.

_______ are diseases that spread from infected persons to healthy ones.

a)

Non-communicable disease

b)

Communicable disease

c)

None of these

21.

Microorganisms are unicellular or______________

a)

Non-cellular

b)

Multicellular

c)

None of these

22.

_____________ is the process where food gets damaged by the growth of microorganisms and becomes inedible for humans.

a)

Food spoilage

b)

Food poisoning

c)

Perishable foods

d)

Preservation of food

23.

Food items which are capable of spoilage are called

a)

Perishable foods

b)

Food poisoning

c)

Food spoilage

d)

None of these

24.

Illness caused due to the consumption of food spoiled by microorganisms is called

a)

Food spoilage

b)

Perishable foods

c)

Food poisoning

25.

The process of preparing food that involves the prevention of the growth of microorganisms so that it can be stored for longer is called ____________.

a)

Food preservation

b)

Food spoilage

c)

Food poisoning

d)

None of these

26.

Malaria is spread by this method

a)

Direct contact

b)

Droplet infection

c)

Untreated wound

d)

Vector