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Biology · MICROBES IN HUMAN WELFARE
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Biology · MICROBES IN HUMAN WELFARE
Match List-I with List-II: List-I List-II A Roquefort cheese I Propionibacterium sharmanii B Swiss cheese II Specific fungi ripening C Toddy III Baker's yeast D Bread IV Fermenting palm sap Choose the correct answer from the options given below:
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The greater the BOD of waste water, more is its polluting potential. Reason (R): BOD refers to the amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. In the light of the above statements, choose the correct answer from the options given below:
Read answer →Biology · MICROBES IN HUMAN WELFARE
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Streptokinase produced by the bacterium Streptococcus is modified by genetic engineering and used as a 'clot buster' for removing clots from blood vessels. Reason (R): Streptokinase acts as a competitive inhibitor of the enzyme responsible for cholesterol synthesis. In the light of the above statements, choose the correct answer from the options given below:
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What is the primary reason why human beings are unable to digest cellulose present in plant foods, while cattle can efficiently utilize it?
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Given below are two statements: Statement I: The spent slurry removed from a biogas plant is rich in nitrogen and phosphorus, making it an effective organic fertilizer. Statement II: Cattle dung is available in large quantities in rural areas and serves as the primary substrate for biogas production plants in India. In the light of the above statements, choose the most appropriate answer from the options given below:
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Given below are two statements: Statement I: Secondary treatment of waste water is also called biological treatment because it relies on aerobic and anaerobic biological agents. Statement II: Fungal flocs formed in aeration tanks significantly reduce the BOD of the effluent before discharge. In the light of the above statements, choose the most appropriate answer from the options given below:
Read answer →Biology · MICROBES IN HUMAN WELFARE
Given below are two statements: Statement I: Biogas is a mixture of gases containing predominantly methane produced by microbial activity and can be used as fuel. Statement II: The type of gas produced depends entirely upon the animal breed from which cattle dung is collected for slurry preparation. In the light of the above statements, choose the most appropriate answer from the options given below:
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Given below are two statements: Statement I: Wine and beer are produced without distillation whereas whisky, brandy and rum are produced by distillation of the fermented broth. Statement II: Saccharomyces cerevisiae is used for fermenting malted cereals and fruit juices to produce ethanol. In the light of the above statements, choose the most appropriate answer from the options given below:
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Statins, commercialized as blood-cholesterol lowering agents, are produced by which of the following yeasts?
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Untreated sewage is frequently discharged directly into rivers, leading to severe water pollution and water-borne diseases. Reason (R): The number of sewage treatment plants constructed across urban areas has increased proportionally to match the massive generation of sewage from increasing urbanization. In the light of the above statements, choose the correct answer from the options given below:
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Which of the following organic acids is produced commercially through the fermentation activity of Acetobacter aceti?
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In a typical biogas plant, what is the nature of the active microbial process occurring inside the concrete digester tank?
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Which microbial product is used as a clot buster to remove clots from blood vessels of patients who have undergone myocardial infarction?
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Consider the following statements regarding sewage treatment: (A) Primary treatment involves the physical removal of particles—large and small—through filtration and sedimentation. (B) Secondary treatment is also known as biological treatment and is carried out by anaerobic bacteria. (C) The effluent from primary settling tank is passed into large aeration tanks for mechanical agitation and air pumping. (D) The greater the BOD of waste water, more is its polluting potential. Which of the above statements are correct?
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Antibiotics are chemical substances produced by some microbes and can kill or retard the growth of other disease-causing microbes. Reason (R): Anti is a Greek word that means 'against', and bio means 'life', together meaning 'against life' in the context of human beings. In the light of the above statements, choose the correct answer from the options given below:
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Consider the following statements about microbes in household products: (A) Curd contains millions of lactic acid bacteria (LAB) which improve nutritional quality by increasing vitamin B12. (B) The puffed-up appearance of dough for dosa and idli is due to carbon dioxide production. (C) Swiss cheese has large holes due to production of \( \text{CO}_2 \) by Propionibacterium sharmanii. (D) Toddy is made by fermenting sap from palms. How many of the above statements are correct?
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Consider the following statements regarding microbes in industrial products: (A) Production on an industrial scale requires growing microbes in very large vessels called fermentors. (B) Antibiotics are 'pro life' with reference to human beings, meaning they promote pathogen growth. (C) The chemical substance penicillin was named after the mould Penicillium notatum. (D) Lipases are used in detergent formulations to help remove oily stains from laundry. Which of the above statements are correct?
Read answer →Biology · MICROBES IN HUMAN WELFARE
