Microorganisms: Friend and Foe-Commercial Use of Microorganisms [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 4 of 4

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Question 1

Question MCQ▾

Micro-organisms decompose organic waste such as

Choices

Choice (4)Response

a.

Cheese, pickles

b.

Vegetable peels, plants and animal waste

c.

Medicines

d.

Vaccines

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Question 2

Question MCQ▾

Diseases prevented by vaccination are

Choices

Choice (4)Response

a.

Dengue and Malaria

b.

Small pox, tuberculosis, measles

c.

Diphtheria, Cholera

d.

Both b. and c. are correct

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Question 3

Question MCQ▾

Name micro-organisms which increases soil fertility is:

Choices

Choice (4)Response

a.

Rhizobium

b.

Anabaena and Nostoc

c.

Azotobacter

d.

All a., b. and c. are correct

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Question 4

Question MCQ▾

The Vaccine is defined as:

Choices

Choice (4)Response

a.

A preparation containing dead or weakened pathogens that when injected into the body elicit an immune response.

b.

Term applied to the lower side of the fish

c.

A non -living particle containing genetic matter and covering of protein.

d.

A component of the vertebral column

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