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Question-1 Microbial diseases that can spread from an infected person to a healthy person are known as ........i........... diseases. The examples of such diseases are .........ii........... and .............iii............. The information in which row completes the given statements ?

(A) i- Communicable; ii- cholera; iii - typhoid	(B)i- Non-communicable ; ii- cholera ; iii- cancer.
(C)i- Communicable ; ii- cancer ; iii- diabetes	(D)i- non-communicable ; ii- diabetes ; iii- typhoid

Question-2 Which of the following diseases is not caused by virus ?

(A) Chicken pox	(B)Hepatitis B
(C)Measles	(D)Typhoid

Question-3 The spoilage of milk is prevented by ...........i........... Vegetables are treated by ............ii.......... to preserve them from attack of microbes.
The information in which row completes the given statement.

(A) i -Sugar; ii - salt	(B)i - Pasteurization; ii - salt
(C)i - Pasteurization; ii - oil and vinegar	(D)i - Sugar; ii - oil and vinegar

Question-4 Foot and mouth disease of cattle is caused by

(A) Bacterium	(B)Virus
(C)Fungi	(D)Protozoan

Question-5 Which of the following diseases is caused by virus ?

(A) Tuberculosis and polio	(B)Polio and malaria
(C)Chicken pox and measles	(D)Cholera and typhoid.

Question-6
The given table shows the microorganism and their category.

Category Bacteria fungi Algae Protozoan

Microorganisms i ii iii iv

Which information completes the given table?

(A) i- Streptococcus; ii- Rhizopus; iii- Spirogyra; iv- Entamoeba.	(B) i- Entamoeba; ii-Streptococcus ; iii- Rhizopus; iv- Spirogyra.
(C) i- Spirogyra; ii- Entamoeba ; iii- Streptococcus; iv- Rhizopus.	(D) i- Rhizopus; ii- Spirogyra ; iii- Entamoeba; iv- Streptococcus.

Question-7
The given table represents organisms and their action.

Organisms Actions

.........i........... Baking of bread

Bacterium ...........ii..............

................iii...............
Causes AIDS

Which of the information completes the given table?

(A) i- Yeast; ii- cause measles; iii- virus	(B) i- Yeast; ii- cause cholera; iii- virus
(C) i- Rhizobium; ii- cause cholera; iii- protozoan	(D) i- Rhizobium; ii- cause measles; iii- protozoan

Question-8 A disease 'X' is spreading in an area because of consumption of contaminated water by people of that area.
The disease 'X' is

(A) Dengue	(B)Typhoid
(C)Chicken pox	(D)Common cold

Question-9 The .........i........... Anopheles mosquito transmits ...........i........... through its bite. Which information completes the given statement ?

(A) i- Female; ii- Trypanosoma	(B)i- Male; ii - Plasmodium
(C)i- Male; ii - Trypanosoma	(D)I -Female; ii - Plasmodium

Question-10 Carrier of dengue virus is

(A) Female Aedes mosquito	(B)Male Aedes mosquito
(C)Female Anopheles mosquito	(D)Male Anopheles mosquito

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Std 8

CBSE

Practice in Related Chapters
Reproduction in Animals
Microorganisms: Friend and Foe
Reaching the Age of Adolescence
Cell - Structure and Functions
Conservation of Plants and Animals
Crop Production & Management

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