Microorganisms: Friend and Foe (CBSE Class-8 Science): Questions 42 - 46 of 46

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Question number: 42

» Microorganisms: Friend and Foe » Microorganisms » Protozoa and Algae

MCQ▾

Question

The Protozoa which causes amoebic dysentery in human is

Choices

Choice (4) Response

a.

Entamoeba

b.

Plasmodium

c.

Trypanosoma

d.

Giardia

Question number: 43

» Microorganisms: Friend and Foe » Nitrogen Fixation » Process of Nitrogen Fixation

MCQ▾

Question

Steps involved in nitrogen cycle are:

Choices

Choice (4) Response

a.

Ammonification

AND

Nitrogen Fixation

b.

Nitrification

c.

De-nitrification

d.

All a. , b. and c. are correct

Question number: 44

» Microorganisms: Friend and Foe » Microorganisms » Virus

MCQ▾

Question

Micro-organisms which are the link between the living and non-living organisms is:

Choices

Choice (4) Response

a.

Algae

b.

Bacteria

c.

Virus

d.

Fungi

Question number: 45

» Microorganisms: Friend and Foe » Commercial Use of Microorganisms » Vaccine

MCQ▾

Question

The Vaccine is defined as:

Choices

Choice (4) Response

a.

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

b.

A component of the vertebral column

c.

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

d.

Term applied to the lower side of the fish

Question number: 46

» Microorganisms: Friend and Foe » Microorganisms and Us » Medicinal Use of Microorganisms

MCQ▾

Question

Penicillin is obtained from the micro-organisms

Choices

Choice (4) Response

a.

Penicilliumnotatum

b.

Mushrooms

c.

Rhizobium

d.

Yeast

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