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455 questions in this collection · Page 12 of 46
Question 111 of 455
📘 CLASS XII
Microbes In Human Welfare
The phenomenon where a mould prevented *Staphylococci* growth in Alexander Fleming’s unwashed culture plate led to the discovery of:
Alexander Fleming observed a mould growing... around which Staphylococci could not grow. He named the chemical produced Penicillin.
Question 112 of 455
📘 CLASS XII
Microbes In Human Welfare
Which of the following acids is produced by the bacterium *Acetobacter aceti*?
Acetobacter aceti (a bacterium) is an acid producer of acetic acid.
Question 113 of 455
📘 CLASS XII
Microbes In Human Welfare
Lipases are specific enzymes used in laundry detergents because they are helpful in removing which type of stain?
Lipases are used in detergent formulations and are helpful in removing oily stains from the laundry.
Question 114 of 455
📘 CLASS XII
Microbes In Human Welfare
The "clot buster" enzyme Streptokinase is produced by which microorganism?
Streptokinase produced by the bacterium Streptococcus.
Question 115 of 455
📘 CLASS XII
Microbes In Human Welfare
Which bioactive molecule is used to treat patients who have undergone myocardial infarction (leading to heart attack)?
Streptokinase is used as a ‘clot buster’ for removing clots from the blood vessels of patients who have undergone myocardial infarction leading to heart attack.
Question 116 of 455
📘 CLASS XII
Microbes In Human Welfare
Myocardial infarction is commonly known as a/an:
Streptokinase is used for patients who have undergone myocardial infarction leading to heart attack.
Question 117 of 455
📘 CLASS XII
Microbes In Human Welfare
To be useful as an immunosuppressive agent in organ-transplant patients, Cyclosporin A must suppress:
Cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients.
Question 118 of 455
📘 CLASS XII
Microbes In Human Welfare
The technique of using microbial treatment of sewage is difficult for man-made technology to rival because:
Till date, no man-made technology has been able to rival the microbial treatment of sewage.
Question 119 of 455
📘 CLASS XII
Microbes In Human Welfare
A major negative consequence of discharging untreated sewage directly into rivers, as mentioned in the text, is:
The untreated sewage is often discharged directly into rivers leading to their pollution and increase in water-borne diseases.
Question 120 of 455
📘 CLASS XII
Microbes In Human Welfare
The primary source of cellulosic material degraded by methanogens in rural areas is:
Thus, the excreta (dung) of cattle, commonly called gobar, is rich in these bacteria.