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Question-1 Which of the following actions is a preventive measure for controlling occurrence of malaria ?

(A) Consumption of properly cooked food.	(B)Taking periodic vaccination.
(C)Isolating patients and their belongings.	(D)Avoiding accumulation of water in and around neighborhood.

Question-2 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-3 Shashi's mother added a little curd to warm milk to set curd for the next day. Which micro-organism is responsible for the formation of curd ?

(A) Escherichia coli	(B)Bacillus anthracis
(C)Lactobacillus	(D)Streptococcus

Question-4 Antibiotics are not effective against which of the following diseases?

(A) Common cold	(B)Tuberculosis
(C)Cholera	(D)Typhoid

Question-5
Which microorganism is said to lie on the border line dividing living things and non-living things ?

(A) Bacteria	(B) Protozoa
(C) Fungi	(D) Virus

Question-6
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-7 Which of the following diseases can be transmitted by air?

(A) Measles	(B)Cholera
(C)Typhoid	(D)Malaria

Question-8 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-9 Which of the following diseases is not caused by virus ?

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

Question-10 Shyam labeled four pots as I, II, III and IV. He placed vegetable peels, broken glasses, plastic bags and plastic toys in pot I to IV respectively. He then covered the pot with soil and left it for two weeks?
The contents of which pot will be decomposed by microbes present in soil ?

(A) I	(B)II
(C)III	(D)IV

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Std 8

CBSE

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