Microbes In Human Welfare
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A common biocontrol agent for the control of plant diseases is
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Baculovirus
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Bacillius thuringiensis
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Glomus
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Trichoderma
D.
Trichoderma
Trichoderma is a genus of fungi that is present in all soils, where they are the most prevalent culturable fungi. Many species in the genus can be characterised as opportunistic avirulent plant symbionts. Several strains of Trichoderma have been developed as biocontrol agents against the fungal disease of plants. The various mechanisms include antibiosis, parasitism inducing host-plant resistance and competition. Most biocontrol agents are from the species. T.harzianum, T. varied and T. hamatum. The biocontrol agent generally grows in its natural habitat on the root surface and so affects root disease in particular but can also be effective against the foliar disease.
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A good producer of citric acid is
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Aspergillus
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Pseudomonas
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Clostridium
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Saccharomyces
A.
Aspergillus
A good producer of citric acid is Aspergillus niger (a fungus). Clostridium produces butyric acid, Saccharomyces cerevisiae is used for bread baking fermenting malted cereals and fruit juices to produce ethanol. Pseudomonas (a bacterium) is used in Vitamin -B-12 production.
A nitrogen-fixing microbe associated with Azolla in rice field is
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Spirulina
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Anabaena
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Frankia
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Tolypothrix
B.
Anabaena
Anabaena azollae is a free-living nitrogen fixing blue-green alga or cyanobacterium but it may also live symbiotically in the leaf cavities of Azolla, an aquatic, fee floating, fresh water pteridophyte (fern). This cyanobacterium has nitrogenase enzyme, therefore can fix nitrogen, If this fern is grown in paddy (rice) fields, a remarkable 50% increase in yield can be noticed.A patient brought to a hospital with myocardial infarction is normally immediately given
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penicillin
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streptokinase
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cyclosporin - A
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statins
B.
streptokinase
Streptokinase (SK), a protein secreted by several species of streptococci can bind and activate human plasminogen. It is used as an effective and inexpensive. It is used as an effective and inexpensive thrombolysis medication in some cases of myocardial infarction and pulmonary embolism.A person likely to develop tetanus is immunised by administering
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dead germs
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preformed antibodies
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wide spectrum antibiotics
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weakened germs
B.
preformed antibodies
In passive immunity, the antibodies are produced in some other organism (eg, horse) in response to the given antigen,.These antibodies are then injected into the human body at the time of need. This is known as inoculation, eg, persons infected by tetanus, rabies, Salmonella and snake venom are given the sufficient amount of antibodies, so that they can survive.
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Mock Test Series
Mock Test Series