MCQ Questions for Class 12 Biology Chapter 10 Microbes in Human Welfare with Answers Set-C

Microbes in Human Welfare Class 12 Biology MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Biology Chapter 10 Microbes in Human Welfare with Answers Pdf free download. MCQ Questions for Class 12 Biology with Answers were prepared based on the latest exam pattern. We have Provided Microbes in Human Welfare Class 12 Biology MCQs Questions with Answers to help students understand the concept very well.

Class 12 Biology Chapter 10 Quiz

Class 12 Biology Chapter 10 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Biology Chapter 10 Microbes in Human Welfare to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Microbes in Human Welfare Class 12 Biology MCQ online test

Q1.	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

Ans: floes

Q2.	BOD is………..in polluted water and in potable water.
	A.more, less
	B.less, more
	C.less in both
	D.medium in both

Ans: more, less

Q3.	In 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

Ans: activated sludge

Q4.	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)

Ans: Both (a) and (c)

Q5.	Methanogens, growing anaerobically on cellulosic material produce
	A.methane
	B.methane and carbon dioxide
	C.methane and hydrogen
	D.methane, carbon dioxide and hydrogen

Ans: methane, carbon dioxide and hydrogen

Q6.	Which of the following bacteria is present in the rumen of cattle ?
	A.Azotobacter
	B.Rhizobium
	C.Methanobacterium
	D.Azospirillum

Ans: Methanobacterium

Q7.	Process of biogas production is
	A.aerobic process
	B.anaerobic process
	C.active process
	D.passive process

Ans: anaerobic process

Q8.	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)

Ans: both (b) and (c)

Q9.	Dragonflies are used to get rid of
	A.mosquitoes
	B.aphids
	C.butterfly caterpillars
	D.both (a) and (b)

Ans: mosquitoes

Q10.	A microbial biocontrol agent that can be used to control butterfly caterpillars is
	A.Trichoderma polysporum
	B.Bacillus thuringiensis
	C.Streptococcus
	D.mycorrhiza

Ans: Bacillus thuringiensis

Q11.	Bacillus thuringiensis is used to control
	A.bacterial pathogens
	B.fungal pathogens
	C.nematodes
	D.insect pests

Ans: insect pests

Q12.	Bacillus thuringiensis (Bt) strains have been used for designing novel
	A.biofertilisers
	B.bio-metallurgical techniques
	C.bio-mineralisation process
	D.bio-insecticidal plants

Ans: bio-insecticidal plants

Q13.	Trichoderma harzianum has proved to be a useful microorganism for
	A.gene transfer in higher plants
	B.biological control of soil-borne plant pathogens
	C.bioremediation of contaminated soils
	D.reclamation of wastelands

Ans: biological control of soil-borne plant pathogens

Q14.	Baculoviruses (Nucleopolyhedrovirus) do not show
	A.host specificity
	B.narrow spectrum applications
	C.effects on non-target pathogens
	D.utility in IPM programme

Ans: effects on non-target pathogens

Q15.	The residue left after methane production from cattle dung is
	A.burnt
	B.burried in land fills
	C.used as manure
	D.used in civil construction

Ans: used as manure

Q16.	Methanogens do not produce
	A.oxygen
	B.methane
	C.hydrogen sulphide
	D.carbon dioxide

Ans: oxygen

Q17.	Microbes are present in
	A.soil
	B.thermal vents
	C.polluted water
	D.all of these

Ans: all of these

MCQ Questions for Class 12 Biology

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MCQ Questions for Class 12 Biology Chapter 10 Microbes in Human Welfare with Answers

MCQ Questions for Class 12 Biology Chapter 10 Microbes in Human Welfare with Answers Set-C

Microbes in Human Welfare Class 12 Biology MCQs Questions with Answers

Class 12 Biology Chapter 10 Quiz

Class 12 Biology Chapter 10 MCQ Online Test

Microbes in Human Welfare Class 12 Biology MCQ online test

MCQ Questions for Class 12 Biology

NCERT Solutions for Class 12 Biology

Class 12 Biologys

NCERT Solutions for Class 12 Biology

NCERT Solutions for Class 12 Biology

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Class 12 Biology

Class 12 Biology

Class 12 Biology

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Biology : Class 12

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NCERT Biology Class 12

NCERT Bio Class 12

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