This practice test includes 25 important multiple-choice questions (MCQs) with answers and explanations from the Class 12th Biology Chapter – Microbes In Human Welfare. These questions are very helpful for NEET and other competitive entrance exams after the 12th.
Microbes in Human Welfare : Class – 12th (Biology) Practice Test | MCQs for NEET
Score: 0 / 25
Questions
Q1. Integrated Pest Management (IPM) discourages the excessive used of
chemical pesticides
Q2. Which of the following is not used as a biopesticide ?
Xanthomonas campestris is not used as a biopesticide
Q3. Organic farming does not include
chemical fertilisers
Q4. Organic farming includes
all of these
Q5. Living organisms used to enrich the nutrient quality of the soil are called as
Living organisms used to enrich the nutrient quality of the soil are called as natural fertilisers
Q6. Biofertilisers are
These are some bacteria and cyanobacteria
Q7. Biofertilisers are the living organisms which
Q8. Which one of the following can be used as biofertiliser in cotton field ?
Azotobacter chroococcum used as biofertiliser in cotton field
Q9. The symbiotic association between fungi and roots of higher plants is referred to as
mycorrhiza
Q10. Cyanobacteria are
Cyanobacteria are autotrophs
Q11. Enzyme which has the fibrinolytic effect is
Enzyme which has the fibrinolytic effect is streptokinase
Q12. Statins used for lowering blood cholesterol level are extracted from
Statins used for lowering blood cholesterol level are extracted from yeast
Q13. Monascus purpureus is a yeast commercially used in the production of
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
solid particles that settle down are called primary sludge
Q15. The purpose of biological treatment of waste water is to
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
Q17. BOD is………..in polluted water and in potable water.
more, less
Q18. n the sewage treatment, bacterial floes are allowed to sediment in a settling tank. This sediment is called as
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 ?
Both (a) and (c)
Q20. Methanogens, growing anaerobically on cellulosic material produce
They produce methane, carbon dioxide and hydrogen.
Q21. Which of the following bacteria is present in the rumen of cattle ?
Methanobacterium is present in the rumen of cattle.
Q22. Process of biogas production is
Process of biogas production is anaerobic process
Q23. Biogas is produced by
Biogas is produced by both (b) and (c)
Q24. Dragonflies are used to get rid of
mosquitoes
Q25. A microbial biocontrol agent that can be used to control butterfly caterpillars is
Bacillus thuringiensis
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