* Glomus forms mycorrhizae in symbiosis with root of higher plants and helps in absorption of phosphorus from the soil.
#Biocontrol agents in human welfare free
* Azospirillum and Azotobacter are free living nitrogen fixing bacteria. * Rhizobium fixes atmospheric nitrogen into ammonia by symbiotic association with legume roots which is absorbed by the plant. * Cyano bacteria – Anabaena, Nostoc, Oscillatoria * Bacteria – Rhizobium, Azospirillum, Azotobacter What are bio fertilizers? Give two examples and discuss their role as bio fertilizers.Ī: Bio fertilizers are organisms that enrich the nutrient quality of the soil. Name the scientists who were credited for showing the role of penicillin as an antibiotic.ġ. Name any two fungi which are used in the production of antibiotics.Ģ0. In which food would you find lactic acid bacteria? Name the bacterium. Why are cyanobacteria considered useful in paddy fields? Cyanobacteria like Anabaena, Nostoc, Oscillatoria fix atmospheric nitrogen into the soil.Ī: They also add organic matter to the soil and increase fertility of the soil. Hence they are considered to be useful in paddy fields.ġ8. What is the group of bacteria found in both the rumen of cattle and sludge of sewage treatment?ġ7. Give an example of a rod shaped virus.ġ6. Name any two industrially important enzymes.ġ5. Which species of Pencillium produces Roquefort cheese?ġ3. Why are blue green algae not popular as bio fertilizers?Ī: Blue green algae /cyanobacteria are mostly aquatic and require high moisture content for their survival. They are free living and cannot readily form symbiosis with roots of crop plants like Rhizobium and Mycorrhizal fungi. Hence they are not popular as bio fertilizers.ġ2. Name any two genetically modified crops.ġ1. Give any two microbes that are useful in biotechnology.ġ0.
Write the most important characteristic that Aspergillus niger, Clostridium butylicum and Lactobacillus share.Ī: All the three microorganisms are acid producers.ĩ. Thus distillation is required for producing alcoholic drinks with high alcohol percentage.Ĩ. Why is distillation required for producing certain alcoholic drinks?Ī: Drinks like Whisky, Brandy and Rum have high percentage of alcohol hence they should be heated at low temperatures and collected in the form of vapors. Antibiotics improved our capacity to treat deadly diseases like plague, whooping cough, diphtheria, leprosy etc.ħ. How has the discovery of antibiotics helped mankind in the field of medicine?Ī: With reference to mankind we may call antibiotics as "Pro-life" that is they help life forms by acting against many disease causing microorganisms. What is Nucleopolyhedrovirus being used for now a days?Ī: Nucleopolyhedrovirus are used as biological control agents which attack insects and other arthropods thus helping in pest control.Ħ. Why do we prefer to call secondary waste water treatment as biological treatment?Ī: As we use flocs made of bacteria and fungal filaments and other anaerobic bacteria during treatment of sewage it is also called biological treatment.ĥ. Thus they lower blood cholesterol level.Ĥ.
Statins act as competitive inhibitors towards the enzymes responsible for synthesis of cholesterol.
How do statins lower blood cholesterol level? Name a microbe used for statin production. Why does ‘Swiss Cheese’ have big holes? Name the bacteria responsible for it.Ī: Swiss cheese has big holes due to large amount of CO2 produced by the bacteria Propionibacterium sharmanii.Ī: Very large vessels used for production of beverages on an industrial scale are called fermenters.ģ.
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