• January 29, 2022

Biology MCQ on Microbes in Human Welfare for NEET and Medical Exam 2021

MCQ on Microbes in Human Welfare: Biology is one of the most important and vital sections in NEET. It includes theories, descriptions, discoveries, diagrams, definitions, explanation of differences and relations. Most of the concepts covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12. Other related sources make up for the rest of the syllabus.

MCQ on Microbes in Human Welfare

In this post we are providing you MCQ on Microbes in Human Welfare, which will be beneficial for you in upcoming NEET, AIIMS, JIPMER, PGIMER, CBSE Board, ICSE Board, Class 12th, 11th.

MCQ on Microbes in Human Welfare

Q1. 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

View Answer

(c) that water is highly polluted

Q2. _____ is chiefly produced by the activity of an anaerobic bacteria on sewage.
a) Laughing gas
b) Propane
c) Mustard gas
d) Marsh gas

View Answer

(d) Marsh gas

Q3. Which 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

View Answer

(d) Bt-cotton to increase yield

Q4. Which of the following is not a biofertilizer ?
a) Agrobacterium
b) Nostoc
c) Rhizobium

View Answer

(a) Agrobacterium

Q5. 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)

View Answer

(b) Secondary treatment

Q6. For the production of ethanol, the most common substrate used in distilleries is ______.
a) Soya meal
b) Molasses
c) Ground gram
d) cornmeal

View Answer

(b) Molasses

Q7. 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

View Answer

(d) bacterium producing large quantities of carbon dioxide

Q8. Carbon dioxide is not released in which of the following processes?
a) Lactate fermentation
b) Alcholic fermentation
c) Aerobic respiration in animals
d) Aerobic respiration in plants

View Answer

(a) Lactate fermentation

Q9. ______ is a good producer of citric acid.
a) Aspergillus
b) Clostridium 
c) Saccharomyces
d) Pseudomonas

View Answer

(a)  Aspergillus 

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By Team Learning Mantras