Q.1
Which one among the following components of vermicompost contains plant growth factors ...
  • a) Humic acid
  • b) Nitrogen
  • c) Microbes
  • d) Phosphorus
Q.2
Which one is a symbiotic nitrogen fixing plant ... [ DPMT 2008]
  • a) Azolla
  • b) Marchantia
  • c) Moss
  • d) Pinus
Q.3
Which is correct? ...[ CBSE 1994]
  • a) Legumes fix nitrogen through bacteria in their leaves
  • b) Legumes fix nitrogen through bacteria in their roots
  • c) Legumes fix nitrogen independent of bacteria
  • d) Legumes do not fix nitrogen
Q.4
Citric acid is got from ... [ MPPMT 1998]
  • a) Aspergillus niger
  • b) Rhizobium nigricans
  • c) Penicillium citrinum
  • d) Lactobacillus bulgaricus
Q.5
Fermentation of sugar to yield alcohol is carried out by ... [ MPPMT 1994]
  • a) Microorganisms
  • b) Zymase
  • c) Raised temperature
  • d) Decomposition of sugar
Q.6
Bacillus thuringiensis is used as ...[ Odisha 2010]
  • a) Fungicide
  • b) Weedicide
  • c) Insecticide
  • d) Biopesticide
Q.7
Broad spectrum antibiotics are the ones which attack ... [ AFMC 2001]
  • a) Pathogens as well as hosts
  • b) A wide range of pathogens
  • c) Only a pathogen
  • d) Only host
Q.8
nzyme that changes glucose to ethyl alcohol is ...[ MPPMT 1998]
  • a) Zymase
  • b) Diastase
  • c) Invertase
  • d) Maltase
Q.9
In gobar gas, the maximum amount is that of ...[ CBSE Mains 2012]
  • a) Butane
  • b) Propane
  • c) Carbon dioxide
  • d) Methane
Q.10
Mycorrhiza represents ...[ CBSE 1994]
  • a) Antagonism
  • b) Symbiosis
  • c) Parasitism
  • d) Endemism
Q.11
Mycorrhiza is helpful in ...[ CPMT 2003]
  • a) Synthesis of food
  • b) Getting nutrients from soil
  • c) Providing resistance against different regulators
  • d) Increase the fertility of soil
Q.12
Which is linked to discovery of Bordeaux mixture as fungicide? ... [ CBSE 2008]
  • a) Black rust of Wheat
  • b) Loose smut of Wheat
  • c) Bacterial leaf blight of Rice
  • d) Downy mildew of Grapes
Q.13
Which is fungicide ...[ CBSE 2011]
  • a) DDT
  • b) DCMU
  • c) Bordeaux mixture
  • d) 2.4-D
Q.14
Yield of Paddy field can be increased by application of ... [ CBSE 1999]
  • a) Iron bacteria
  • b) Nostoc/ Anabaena
  • c) Archaebacteria
  • d) Symbiotic bacteria
Q.15
They help in increasing soil fertility ... [ Wardha 2011]
  • a) Salvinia and marsilea
  • b) Nostoc and legumes
  • c) Bacillus and Penicillium
  • d) Pseudomonas and cereals
Q.16
The first antibiotic was discovered by ...[ KCET 2004]
  • a) A. Fleming
  • b) R. Koch
  • c) W. Flemming
  • d) Louis Pasteur
Q.17
During fermentation by Yeast, alcohol is formed from ...[ Odisha 1997]
  • a) Proteins
  • b) Sugars
  • c) Mucopolysaccharides
  • d) Fats
Q.18
Trichoderma harzianum is useful for ...[ DPMT 2010]
  • a) Gene transfer in higher plants
  • b) Biological control of soil borne pathogens/ biopesticide
  • c) Bioremediation of Contaminated Soil.
  • d) Reclamation of waste land
Q.19
Which group is responsible for formation and flavour of yoghurt ... [ Pb PMT 2005]
  • a) Bacillus Megaterium and Xanthomonas sp.
  • b) Lactobacillus casei and Streptococcus thermophilus
  • c) Bacillus subtilis and E.Coli
  • d) Rhizobium meliloti and Azotobacter
Q.20
Lactic acid bacteria converts milk into curd and improves its nutritional quality by enhancing vitamin ...[ AMU 2009]
  • a) A
  • b) B
  • c) C
  • d) D
Q.21
Pyrethrin is extracted from ... [ RPMT 1989]
  • a) Azadirachta indica
  • b) Chrysanthemum cinerariifolium
  • c) Poa indica
  • d) Helianthus annuus
Q.22
If wheat field is inoculated with Rhizobium ... [ MPPMT 2009]
  • a) Soil will become rich in calcium
  • b) Soil will become nitrogen rich
  • c) No effect on soil nitrogen
  • d) Soil will become nitrogen rich
Q.23
Streptomyces fradiae produces ...[ MPPMT 2001]
  • a) Aureomycin
  • b) Neomycin
  • c) Erythromycin
  • d) Terramycin
Q.24
One of the alternate sources of proteins for animal and human nutrition is ...[ HPPMT 2011]
  • a) Single cell protein
  • b) Pulse
  • c) Mushrooms
  • d) Non vegetarian meals
Q.25
Brown Plant Hopper is ...[ Kerala 2000[
  • a) Nilaparvata lugens
  • b) Calliphora erythrocephala/i>
  • c) HHelicoverpa armigera
  • d) Schistocerea gregaria
Q.26
Fleming, Chain and Florey were awarded Nobel Prize in 1945 for the discovery of ...[ kerala 2011]
  • a) HIV
  • b) CT scan
  • c) Penicillium
  • d) Staphylococcus
Q.27
Which one is wrongly matched ...[ CBSE 2009]
  • a) Detergent -lipase
  • b) Fruit juice - pectinase
  • c) Alcohol - nitrogen
  • d) Textile - amylase
Q.28
Supply of oxygen to the biogas plant will have ...[ Wardha 2005]
  • a) Positive effect
  • b) Negative effect
  • c) No effect
  • d) None of these
Q.29
Penicillin inhibits bacterial multiplication because it ...[ CPMT 1998]
  • a) Destroys chromatin
  • b) Inhibits cell wall formation
  • c) Checks DNA synthesis
  • d) Check RNA synthesis
Q.30
Fungus used for commercial production of SCP is ... [ Kerala 2009]
  • a) Phytophthora infestans
  • b) Fusarium graminearum
  • c) Brassica napus
  • d) Bacillus thuringiensis
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