Microorganisms: Friend and Foe (CBSE Class-8 Science): Questions 1 - 9 of 46

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Question number: 1

» Microorganisms: Friend and Foe » Harmful Microorganisms » Disease Causing Microorganisms in Humans

MCQ▾

Question

Micro-organisms which causing diseases in human beings are:

Choices

Choice (4) Response

a.

Algae

b.

Virus

c.

Bacteria, Protozoa

d.

Both b. and c. are correct

Question number: 2

» Microorganisms: Friend and Foe » Microorganisms » Bacteria and Fungi

MCQ▾

Question

Fungi helps in the fermentation is

Choices

Choice (4) Response

a.

Mildews

b.

Moulds

c.

Yeast

d.

Mushrooms

Question number: 3

» Microorganisms: Friend and Foe » Microorganisms » Bacteria and Fungi

MCQ▾

Question

Medicines obtained from the fungus is

Choices

Choice (4) Response

a.

Antibiotics

b.

Antiseptics

c.

Antigens

d.

Antibodies

Question number: 4

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

MCQ▾

Question

Micro-organism used in the laboratory for research is:

Choices

Choice (4) Response

a.

Protozoa

b.

Algae

c.

Bacteria

d.

Fungi

Question number: 5

» Microorganisms: Friend and Foe » Harmful Microorganisms » Disease Causing Microorganisms in Plants

MCQ▾

Question

Micro-organisms which causes disease in plants is:

Choices

Choice (4) Response

a.

Protozoa

b.

Bacteria

c.

Virus

d.

Both b. and c. are correct

Question number: 6

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

MCQ▾

Question

Algae that increases the soil fertility is

Choices

Choice (4) Response

a.

Real Algae

b.

Nostoc and Anabaena

c.

Diatoms

d.

Kelps

Question number: 7

» Microorganisms: Friend and Foe » Commercial Use of Microorganisms » Cleaning the Environment

MCQ▾

Question

Micro-organisms decompose organic waste such as

Choices

Choice (4) Response

a.

Vegetable peels, plants and animal waste

b.

Medicines

c.

Cheese, pickles

d.

Vaccines

Question number: 8

» Microorganisms: Friend and Foe » Harmful Microorganisms » Food Poisoning

MCQ▾

Question

Bacteria which causes the food poisoning is:

Choices

Choice (4) Response

a.

Escherichia coli

b.

Peneumococcus

c.

Spirilla

d.

Salmonella and Staphylococcus

Question number: 9

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

MCQ▾

Question

The term Protozoa means:

Choices

Choice (4) Response

a.

The most primitive and simplest animal

b.

Disease causing agents

c.

The disease causing micro-organisms

d.

Organisms which are the carriers of parasite

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