Microorganisms: Friend and Foe (CBSE Class-8 Science): Questions 34 - 41 of 46

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Question number: 34

» Microorganisms: Friend and Foe » Microorganisms » Virus

MCQ▾

Question

Viruses found in the bacteria is called as

Choices

Choice (4) Response

a.

Plant Viruses

b.

Animal Viruses

c.

RNA/DNA Viruses

d.

Bacteriophage

Question number: 35

» Microorganisms: Friend and Foe » Microorganisms » Where Do Microorganisms Live?

MCQ▾

Question

Curd is formed by the process of:

Choices

Choice (4) Response

a.

Reduction

b.

Fertilization

c.

Fermentation

d.

Oxidation

Question number: 36

» Microorganisms: Friend and Foe » Food Preservation » Heat and Cold Treatments

MCQ▾

Question

Full form of UHT is:

Choices

Choice (4) Response

a.

Ultra hot treatment

b.

Ultra heat treatment

c.

Unique heat treatment

d.

Ultra hot temperature

Question number: 37

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

MCQ▾

Question

Friendly micro-organisms are:

Choices

Choice (4) Response

a.

Azotobater, Sea weeds

b.

Lactobacillus, Penicilliumnotatum

c.

Salmonella typhi, Bacillus anthracis

d.

Both a. and b. are correct

Question number: 38

» Microorganisms: Friend and Foe » Food Preservation » Preservation by Sugar, Oil and Vinegar

MCQ▾

Question

Common method of food preservation that is used to stop the growth of moulds and bacteria on food is:

Choices

Choice (4) Response

a.

Deep freezing

b.

Pickling

c.

Drying

d.

Salting

Question number: 39

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

MCQ▾

Question

Algae having cup shaped chloroplast is:

Choices

Choice (4) Response

a.

Chlamydomonas

b.

Chlorella

c.

Spirogyra

d.

Both a. and b. are correct

Question number: 40

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

MCQ▾

Question

Symbiotic bacteria present in the human intestine is

Choices

Choice (4) Response

a.

Lactobacillus

b.

Pneumococcus

c.

Escherichia Coli

d.

Bacillus anthracis

Question number: 41

» Microorganisms: Friend and Foe » Commercial Use of Microorganisms » Increasing Soil Fertility

MCQ▾

Question

Name micro-organisms which increases soil fertility is:

Choices

Choice (4) Response

a.

Azotobacter

b.

Anabaena and Nostoc

c.

Rhizobium

d.

All a. , b. and c. are correct

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