MCQs For Microbes in Human Welfare For NEET and Medical Exam 2022

NEET Biology is the scoring paper in the medical entrance examination. Here, you will discover the NEET Biology MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Biology Microbes in Human Welfare Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.


Q.1. What does a high value of BOD(Biochemical Oxygen Demand) indicate?

(a) That water is pure
(b) that water is less polluted
(c) that water is highly polluted
(d) that consumption of organic matter by microbes is higher in the water

(c) that water is highly polluted


Q.2. This is not a biofertilizer

(a) Agrobacterium
(b) Nostoc
(c) Rhizobium
(d) Mycorrhiza

(a) Agrobacterium


Q.3. Carbon dioxide is not released in which of the following processes?

(a) Lactate fermentation
(b) Alcoholic fermentation
(c) Aerobic respiration in animals
(d) Aerobic respiration in plants

(a) Lactate fermentation


Q.4. This is not an example of performing biological control of diseases/pests using microbes

(a) Trichoderma sp. against some plant pathogens
(b) Nucleopolyhedrovirus against insects and other arthropods
(c) Ladybird beetle against aphids
(d) Bt-cotton to increase yield

(d) Bt-cotton to increase yield


Q.5. This is chiefly produced by the activity of an anaerobic bacteria on sewage

(a) Laughing gas
(b) Propane
(c) Mustard gas
(d) Marsh gas

(d) Marsh gas


Q.6. For the production of ethanol, the most common substrate used in distilleries is

(a) Soya meal
(b) Molasses
(c) Ground gram
(d) cornmeal

(b) Molasses


Q.7. This is a good producer of citric acid

(a) Aspergillus
(b) Clostridium
(c) Saccharomyces
(d) Pseudomonas

(a) Aspergillus


Q.8. In Swiss cheese, big holes are made by a

(a) bacterium producing methane gas
(b) machine
(c) fungus releasing a lot of gases while its metabolic activities
(d) bacterium producing large quantities of carbon dioxide

(d) bacterium producing large quantities of carbon dioxide


Q.9. During which stage of the purification of the sewage water are microbes used?

(a) Primary treatment
(b) Secondary treatment
(c) Tertiary treatment
(d) Both (1) and (2)

(b) Secondary treatment

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