Microbes in Human Welfare CBSE Class 12 Biology MCQ Questions with Answer Keys

If you are preparing for CBSE Class 12 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 12 Biology Chapterwise. In this article of AKVTutorials, you will get Microbes in Human Welfare CBSE Class 12 Biology MCQ Questions with Answer Keys

Microbes in Human Welfare MCQ Questions for Class 12 Question No 11

Pasteurisation is heating at

Option A : 1200 for 60 minutes

Option B : 60– 630 C for therty minutes

Option C : 700 C for 60 minutes

Option D : 800 for 30 minutes

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Option B : 60– 630 C for therty minutes

Microbes in Human Welfare MCQ Questions for Class 12 Question No 12

Azolla possesss symbiotic association with

Option A : Rhizobium 

Option B : Nostoc 

Option C : Anabaena

Option D : Azospirillum

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Option C : Anabaena

Microbes in Human Welfare MCQ Questions for Class 12 Question No 13

Which of the following is source of single cell protein

Option A : Bacillus thuringiensis

Option B : Azospirillum

Option C : Saccharomyces cerevisiae

Option D : Methylophilus methylophus

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Option D : Methylophilus methylophus

Microbes in Human Welfare MCQ Questions for Class 12 Question No 14

Assertion: Nitrogen fixing enzyme in legume root nodules function at low oxygen concentration

Reason: Low oxygen concentration is provided by leghaemoglobin

Option A : Both are true reason being correct explanation

Option B : Both are true but reason is not correct explanation

Option C : Assertion is true but reason is wrong

Option D : Both are wrong

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Option B : Both are true but reason is not correct explanation

Microbes in Human Welfare MCQ Questions for Class 12 Question No 15

In 1928, a scientist discovered the first effective antibiotic. Scientist and antibiotic are

Option A : Fleming – Streptomycin

Option B : Fleming – Penicillin

Option C : Waksman – Penicillin

Option D : Waksman -Streptomycin

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Option B : Fleming – Penicillin

Microbes in Human Welfare MCQ Questions for Class 12 Question No 16

The large holes in ‘Swiss cheese’ are because of

Option A : Clostridium butylicum

Option B : Trichoderma Polysporum

Option C : Propiomibacterium sharmanili

Option D : Sacchasomyces cerevisiae

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Option C : Propiomibacterium sharmanili

Microbes in Human Welfare MCQ Questions for Class 12 Question No 17

Commonly used in alcohal industry is

Option A : Saccharomyces

Option B : Rhizopus

Option C : Puccinia

Option D : Penicillium

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Option A : Saccharomyces

Microbes in Human Welfare MCQ Questions for Class 12  Question No 18:

Which of the following is not used in organic farming

Option A : Earthworm

Option B : Oscillatoria

Option C : Snail

Option D : Glomus

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Option C : Snail

Microbes in Human Welfare MCQ Questions for Class 12 Question No 19:

Red pigment ( leghaemoglobin ) having affinity for oxygen is present in the roots of

Option A : Carrot

Option B : Soyabean

Option C : Mustard

Option D : Radish

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Option B : Soyabean

Microbes in Human Welfare MCQ Questions for Class 12 Question No 20

Bt toxin is got from a

Option A : Eukaryote

Option B : Prokaryote

Option C : Virus

Option D : All the above

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Option B : Prokaryote

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