Q1. Integrated Pest Management (IPM) discourages the excessive used of
A) biological methods
B) chemical pesticides
C) mechanical methods
D) all of these
Answer: (B) chemical pesticides
chemical pesticides
Q2. Which of the following is not used as a biopesticide ?
A) Trichoderma harzianum
B) Nucleopolyhedrovirus
C) Xanthomonas campestris
D) Bacillus thuringiensis
Answer: (C) Xanthomonas campestris
Xanthomonas campestris is not used as a biopesticide
Q3. Organic farming does not include
A) green manures
B) chemical fertilisers
C) farmyard manures
D) compost
Answer: (B) chemical fertilisers
chemical fertilisers
Q4. Organic farming includes
A) use of fertilisers and pesticides of biological origin
B) IPM (Integrated Pest Management)
C) locally developed pest resistant varieties
D) all of these
Answer: (D) all of these
all of these
Q5. Living organisms used to enrich the nutrient quality of the soil are called as
A) biocontrol agents
B) biofertilisers
C) synthetic fertilisers
D) natural fertilisers
Answer: (D) natural fertilisers
Living organisms used to enrich the nutrient quality of the soil are called as natural fertilisers
Q6. Biofertilisers are
A) some bacteria and cyanobacteria
B) fertilisers formed by ploughing in barseem
C) fertilisers obtained by decay of dead organisms
D) fertilisers prepared by mixing cattle dung with crop residues
Answer: (A) some bacteria and cyanobacteria
These are some bacteria and cyanobacteria
Q7. Biofertilisers are the living organisms which
A) bring about soil nutrient enrichment
B) maximise the ecological benefits
C) minimise the environmental hazards
D) all of these
Answer: (D) all of these
Q8. Which one of the following can be used as biofertiliser in cotton field ?
A) Azolla-Anabaena
B) Streptococcus
C) Azospirillum
D) Azotobacter chroococcum
Answer: (D) Azotobacter chroococcum
Azotobacter chroococcum used as biofertiliser in cotton field
Q9. The symbiotic association between fungi and roots of higher plants is referred to as
A) lichen
B) mycorrhiza
C) biofertiliser
D) biocontrol agent
Answer: (B) mycorrhiza
mycorrhiza
Q10. Cyanobacteria are
A) heterotrophs
B) chemotrophs
C) autotrophs
D) organotrophs
Answer: (C) autotrophs
Cyanobacteria are autotrophs
Q11. Enzyme which has the fibrinolytic effect is
A) protease
B) amylase
C) lipase
D) streptokinase
Answer: (D) streptokinase
Enzyme which has the fibrinolytic effect is streptokinase
Q12. Statins used for lowering blood cholesterol level are extracted from
A) algae
B) bacteria
C) viruses
D) yeast
Answer: (D) yeast
Statins used for lowering blood cholesterol level are extracted from yeast
Q13. Monascus purpureus is a yeast commercially used in the production of
A) citric acid
B) ethanol
C) blood cholesterol lowering statins
D) streptokinase for removing clots from blood vessels
Answer: (C) blood cholesterol lowering statins
Monascus purpureus is a yeast commercially used in the production of blood cholesterol lowering statins
Q14. During the primary treatment of sewage, solid particles that settle down are called
A) floes
B) primary sludge
C) activated sludge
D) anaerobic sludge
Answer: (B) primary sludge
solid particles that settle down are called primary sludge
Q15. The purpose of biological treatment of waste water is to
A) reduce BOD
B) increase BOD
C) reduce sedimentation
D) increase sedimentation
Answer: (A) reduce BOD
The purpose of biological treatment of waste water is to reduce BOD
Q16. The masses of bacteria held together by slime and fungal filaments to form mesh-like structures are called as
A) primary sludge
B) floes
C) activated sludge
D) anaerobic sludge
Answer: (B) floes
Q17. BOD is………..in polluted water and in potable water.
A) more, less
B) less, more
C) less in both
D) medium in both
Answer: (A) more, less
more, less
Q18. n the sewage treatment, bacterial floes are allowed to sediment in a settling tank. This sediment is called as
A) inactivated sludge
B) activated sludge
C) primary sludge
D) secondary sluge
Answer: (B) activated sludge
This sediment is called as activated sludge.
Q19. Which of the following steps is taken by the Ministry of Environment and Forests to protect rivers from water pollition ?
A) Ganga Action Plan
B) Narmada Action Plan
C) Yamuna Action Plan
D) Both (a) and (c)
Answer: ()
Both (a) and (c)
Q20. Methanogens, growing anaerobically on cellulosic material produce
A) methane
B) methane and carbon dioxide
C) methane and hydrogen
D) methane, carbon dioxide and hydrogen
Answer: (D) methane, carbon dioxide and hydrogen
They produce methane, carbon dioxide and hydrogen.
Q21. Which of the following bacteria is present in the rumen of cattle ?
A) Azotobacter
B) Rhizobium
C) Methanobacterium
D) Azospirillum
Answer: (C) Methanobacterium
Methanobacterium is present in the rumen of cattle.
Q22. Process of biogas production is
A) aerobic process
B) anaerobic process
C) active process
D) passive process
Answer: (B) anaerobic process
Process of biogas production is anaerobic process
Q23. Biogas is produced by
A) aerobic breakdown of biomass
B) anaerobic breakdown of biomass
C) with the help of methanogenic bacteria
D) both (b) and (c)
Answer: (D) both (b) and (c)
Biogas is produced by both (b) and (c)
Q24. Dragonflies are used to get rid of
A) mosquitoes
B) aphids
C) butterfly caterpillars
D) both (a) and (b)
Answer: (A) mosquitoes
mosquitoes
Q25. A microbial biocontrol agent that can be used to control butterfly caterpillars is
A) Trichoderma polysporum
B) Bacillus thuringiensis
C) Streptococcus
D) mycorrhiza
Answer: (B) Bacillus thuringiensis
Bacillus thuringiensis
🎥 Video Resources
Microbes in Human Welfare Class 12 | NEET 2020 Preparation | NEET Biology MCQs | Garima Goel
Microbes in Human Welfare Class 12 | NEET 2020 Preparation | NEET Biology MCQs | Garima Goel
Microbes in Human Welfare - Quiz | Class 12 | Vedantu Board
Microbes in human welfare class 12 neet previous year questions last 33 years
Microbes in Human Welfare | Class 12 | NEET Biology Lectures | NEET 2020 | Vedantu
NEET 2020 most expected questions || Microbes in Human welfare - part 1 || Beat👊 the NEET
10000 Questions Series for NEET | Microbes in Human Welfare | NCERT Based Questions #NEET_Biology
How to Get PDF from Solotutes.com?
Getting your study material in PDF format from Solotutes is very simple:
Open any post you want to download in PDF format.
Just below the title, you will see a Download PDF button or link.
Click on it and you will be redirected to this download page.
Here, you will need to wait for 1 minute before the PDF button becomes active.
Meanwhile, you can explore other resources available on this page such as related notes, quizzes, one-liners, or even watch relevant YouTube videos embedded here for better understanding.
Once the timer ends, click on the Download Now button and your PDF will start downloading.
Why 1 Minute Wait?
⚡ To generate a clean, optimized, and printer-friendly PDF copy of Microbes in Human Welfare : Class – 12th (Biology) Practice Test | MCQs for NEET.
💡 To support Solotutes with ads during this time, ensuring that our resources remain 100% free for students worldwide.
What You Will Get in Microbes in Human Welfare : Class – 12th (Biology) Practice Test | MCQs for NEET PDF?
✔ A high-quality PDF of Microbes in Human Welfare : Class – 12th (Biology) Practice Test | MCQs for NEET with proper formatting
✔ Easy to read offline on mobile, tablet, or desktop
✔ Great for revision, practice, and quick reference
✔ Additional learning support with related videos and resources linked on this page
✔ Supports our mission: “Knowledge for Everyone”
Why Choose Solotutes?
At Solotutes, we provide free access to notes, quizzes, MCQs, one-liners, and tests for multiple exams. By downloading Microbes in Human Welfare : Class – 12th (Biology) Practice Test | MCQs for NEET in PDF format, you not only get valuable material but also become part of a growing community of learners.
We regularly update our posts with videos, explanations, and extra content to help you understand topics better. Exploring these while waiting for your PDF ensures you don’t waste a single minute.
FAQs – Microbes in Human Welfare : Class – 12th (Biology) Practice Test | MCQs for NEET Download
Q. Is this PDF really free? ✅ Yes! All downloads on Solotutes are completely free for students.
Q. Do I need to sign up? ❌ No, you don’t need to create any account. Just wait for 1 minute and click download.
Q. Can I share this PDF with my friends? ✔ Yes, please share and help others learn too.
Q. Can I access other resources while waiting? 👍 Yes, you can scroll down to check related quizzes, notes, and YouTube videos while your download is getting ready.
About Solotutes
Solotutes.com is dedicated to students preparing for competitive exams, schools, and universities.
We provide free PDFs, quizzes, MCQs, notes, and one-liners to make learning easy and accessible. Our aim is to save your time, keep you motivated, and ensure you always have the best study material — anytime, anywhere.
