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1 of 25
Q.1 Integrated Pest Management (IPM) discourages the excessive used of
- biological methods
- chemical pesticides
- mechanical methods
- all of these
2 of 25
Q.2 Which of the following is not used as a biopesticide ?
- Trichoderma harzianum
- Nucleopolyhedrovirus
- Xanthomonas campestris
- Bacillus thuringiensis
3 of 25
Q.3 Organic farming does not include
- green manures
- chemical fertilisers
- farmyard manures
- compost
4 of 25
Q.4 Organic farming includes
- use of fertilisers and pesticides of biological origin
- IPM (Integrated Pest Management)
- locally developed pest resistant varieties
- all of these
5 of 25
Q.5 Living organisms used to enrich the nutrient quality of the soil are called as
- biocontrol agents
- biofertilisers
- synthetic fertilisers
- natural fertilisers
6 of 25
Q.6 Biofertilisers are
- some bacteria and cyanobacteria
- fertilisers formed by ploughing in barseem
- fertilisers obtained by decay of dead organisms
- fertilisers prepared by mixing cattle dung with crop residues
7 of 25
Q.7 Biofertilisers are the living organisms which
- bring about soil nutrient enrichment
- maximise the ecological benefits
- minimise the environmental hazards
- all of these
8 of 25
Q.8 Which one of the following can be used as biofertiliser in cotton field ?
- Azolla-Anabaena
- Streptococcus
- Azospirillum
- Azotobacter chroococcum
9 of 25
Q.9 The symbiotic association between fungi and roots of higher plants is referred to as
- lichen
- mycorrhiza
- biofertiliser
- biocontrol agent
10 of 25
Q.10 Cyanobacteria are
- heterotrophs
- chemotrophs
- autotrophs
- organotrophs
11 of 25
Q.11 Enzyme which has the fibrinolytic effect is
- protease
- amylase
- lipase
- streptokinase
12 of 25
Q.12 Statins used for lowering blood cholesterol level are extracted from
- algae
- bacteria
- viruses
- yeast
13 of 25
Q.13 Monascus purpureus is a yeast commercially used in the production of
- citric acid
- ethanol
- blood cholesterol lowering statins
- streptokinase for removing clots from blood vessels
14 of 25
Q.14 During the primary treatment of sewage, solid particles that settle down are called
- floes
- primary sludge
- activated sludge
- anaerobic sludge
15 of 25
Q.15 The purpose of biological treatment of waste water is to
- reduce BOD
- increase BOD
- reduce sedimentation
- increase sedimentation
16 of 25
Q.16 The masses of bacteria held together by slime and fungal filaments to form mesh-like structures are called as
- primary sludge
- floes
- activated sludge
- anaerobic sludge
17 of 25
Q.17 BOD is………..in polluted water and in potable water.
- more, less
- less, more
- less in both
- medium in both
18 of 25
Q.18 n the sewage treatment, bacterial floes are allowed to sediment in a settling tank. This sediment is called as
- inactivated sludge
- activated sludge
- primary sludge
- secondary sluge
19 of 25
Q.19 Which of the following steps is taken by the Ministry of Environment and Forests to protect rivers from water pollition ?
- Ganga Action Plan
- Narmada Action Plan
- Yamuna Action Plan
- Both (a) and (c)
20 of 25
Q.20 Methanogens, growing anaerobically on cellulosic material produce
- methane
- methane and carbon dioxide
- methane and hydrogen
- methane, carbon dioxide and hydrogen
21 of 25
Q.21 Which of the following bacteria is present in the rumen of cattle ?
- Azotobacter
- Rhizobium
- Methanobacterium
- Azospirillum
22 of 25
Q.22 Process of biogas production is
- aerobic process
- anaerobic process
- active process
- passive process
23 of 25
Q.23 Biogas is produced by
- aerobic breakdown of biomass
- anaerobic breakdown of biomass
- with the help of methanogenic bacteria
- both (b) and (c)
24 of 25
Q.24 Dragonflies are used to get rid of
- mosquitoes
- aphids
- butterfly caterpillars
- both (a) and (b)
25 of 25
Q.25 A microbial biocontrol agent that can be used to control butterfly caterpillars is
- Trichoderma polysporum
- Bacillus thuringiensis
- Streptococcus
- mycorrhiza
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Biotechnology: Principles and Processes - Biology (Class 12th) Revision Test | MCQs for NEET