MCQ Class 12 Biology Chapter 8 Microbes in Human Welfare

MCQ’s For All Chapters – Biology Class 12th

1. There will be total 10  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. The term antibiotic was first used by

Pasteur

Lister

Waksman

Flemming

Your comments:

Question 1 of 10

2. Lactic acid bacteria (LAB) grow in milk and convert it to curd and also improve its nutritional quality by increasing

Vitamin C and A

Vitamin B₆

Vitamin A

Vitamin B₁₂

Your comments:

Question 2 of 10

3. Methanogens growing anaerobically on cellulosic material produce

Methane and hydrogen

Methane and carbon dioxide

Methane, carbon dioxide and hydrogen.

Methane

Your comments:

Question 3 of 10

4. Maximum number of antibiotics are got from any group except for

Fungi

Viruses

Eubacteria

Actinomycetes

Your comments:

Question 4 of 10

5. Identify the fungus with medicinal importance.

Agaricus

Cercospora

Saccharomyces

Penicillium

Your comments:

Question 5 of 10

6. Which one of the following microbes is used in the commercial production of ethanol?

Streptococcus spp.

Clostridium butyricum

Trichoderma polysporum

Saccharomyces cerevisiae

Your comments:

Question 6 of 10

7. A sewage treatment process in which a part of the decomposer bacteria present in the wastes are recycled into the starting of the process is called

Cyclic treatment

Primary treatment

Activated sludge treatment

Tertiary treatment

Your comments:

Question 7 of 10

8. Probiotics are

Live microbial food supplement

New kind of food allergens

Cancer inducing microbes

Safe antibiotics

Your comments:

Question 8 of 10

9. Lactic acid is formed by the process of

Fermentation

Glycolysis

HMP Pathway

None of these

Your comments:

Question 9 of 10

10. Rennin used in the cheese industry is

Alkaloid

Enzyme

Antibiotic

Inhibitor

Your comments:

Question 10 of 10

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