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All questions of Microbes in Human Welfare for NEET Exam
In which of the following microbes are not used extensively?
a. Converting milk into curd.
b. Making cheese of different flavor and taste.
c. Production of anti-viral drugs.
d. Production of antibiotics.
e. As bio-fertilizers.
f. Production of inorganic fertilizers
- a)Only ‘a’ and ‘b’
- b)Only ‘b’ and ‘c’
- c)Only ‘c’ and ‘f’
- d)Only ‘c’ and ‘d’
Correct answer is option 'C'. Can you explain this answer?
In which of the following microbes are not used extensively?
a. Converting milk into curd.
b. Making cheese of different flavor and taste.
c. Production of anti-viral drugs.
d. Production of antibiotics.
e. As bio-fertilizers.
f. Production of inorganic fertilizers
a. Converting milk into curd.
b. Making cheese of different flavor and taste.
c. Production of anti-viral drugs.
d. Production of antibiotics.
e. As bio-fertilizers.
f. Production of inorganic fertilizers
a)
Only ‘a’ and ‘b’
b)
Only ‘b’ and ‘c’
c)
Only ‘c’ and ‘f’
d)
Only ‘c’ and ‘d’
|
Om Desai answered |
- Microbes are not used in the production of antiviral drugs and the production of inorganic fertilizers.
- Although, microbes are used in converting milk into curd, antibiotic production, sewage treatment, bread and cheese industry etc.
Micro-organisms that grow in milk and convert it to curd is commonly called?- a)Milk bacteria
- b)Lacto-bacteria
- c)Lactic acid bacteria
- d)Curd bacteria
Correct answer is option 'C'. Can you explain this answer?
Micro-organisms that grow in milk and convert it to curd is commonly called?
a)
Milk bacteria
b)
Lacto-bacteria
c)
Lactic acid bacteria
d)
Curd bacteria
|
Rohit Shah answered |
Correct Option is (C)
Microbes in household products. Milk is converted to curd by micro-organisms such as Lactobacillus and others commonly called lactic acid bacteria (LAB) which grow in milk and convert it to curd.
Microbes in household products. Milk is converted to curd by micro-organisms such as Lactobacillus and others commonly called lactic acid bacteria (LAB) which grow in milk and convert it to curd.
The puffed-up appearance of dough is due to production of? - a)SO2 gas
- b)CO2 gas
- c)Water vapour
- d)O2 gas
Correct answer is option 'B'. Can you explain this answer?
The puffed-up appearance of dough is due to production of?
a)
SO2 gas
b)
CO2 gas
c)
Water vapour
d)
O2 gas
|
Prisha Singh answered |
The puffed-up appearance of dough is due to production of CO2 gas. Baking soda (sodium hydrogen carbonate) on heating release carbon dioxide gas along with sodium carbonate.
High value of BOD shows?- a)Water is highly polluted
- b)Water is normal
- c)Water is less polluted
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
High value of BOD shows?
a)
Water is highly polluted
b)
Water is normal
c)
Water is less polluted
d)
None of these
|
Deepak Joshi answered |
Biological oxygen demand is the amount of oxygen required to completely decompose the organic waste present in one liter of water by bacteria. High value of BOD shows that water is highly polluted.
Which of the followings is also called sac fungi that live parasitically and in various habitats?- a)Basidiomycetes
- b)Ascomycetes
- c)Phycomycetes
- d)Zygomycetes
Correct answer is option 'B'. Can you explain this answer?
Which of the followings is also called sac fungi that live parasitically and in various habitats?
a)
Basidiomycetes
b)
Ascomycetes
c)
Phycomycetes
d)
Zygomycetes
|
Mahi Shah answered |
Ascomycetes produce ascus with are sac like structure beacuse of this they also known as 'Sac Fungi'.
Yeast is used in the production of- a)Citric acid and lactic acid
- b)Cheese and butter
- c)Lipase and pectinase
- d)Bread and beer
Correct answer is option 'D'. Can you explain this answer?
Yeast is used in the production of
a)
Citric acid and lactic acid
b)
Cheese and butter
c)
Lipase and pectinase
d)
Bread and beer
|
Mohammed Abdul Rahman Ri answered |
Yes.... Because yeast breaks down a complex substance into ethanol and carbon dioxide.... The fluffyness in bread is due to carbon dioxide
Baculoviruses are pathogens that- a)Attacks birds and snail
- b)Promote insects and arthropods
- c)Attack insects and other arthropods
- d)Kills useful insects in the field
Correct answer is option 'C'. Can you explain this answer?
Baculoviruses are pathogens that
a)
Attacks birds and snail
b)
Promote insects and arthropods
c)
Attack insects and other arthropods
d)
Kills useful insects in the field
|
Sadiya Naaz answered |
Baculovirus are pathogens that attack insects and other arthropods.
The majority of baculoviruses used as biocontrol agents are in genus Nucleopolyhedrovirus.
These viruses are excellent for species-specific, narrow spectrum insecticidal applications.
They do not show negative impacts on plants, mammals, bird, fish or even non-target insects. Therefore, they play an important role as biocontrol agents.
Refer ncert class 12.
Which of the following bacterium produces butyric acid?- a)Clostridium butylicum
- b)Acetobacter aceti
- c)Lactobacillus
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Which of the following bacterium produces butyric acid?
a)
Clostridium butylicum
b)
Acetobacter aceti
c)
Lactobacillus
d)
None of these
|
|
Kadambala Hemalatha answered |
First option is correct, because I will eliminate one by one option aceto bacter aceti produce acetic acid , lacto bacillus lacti produce lactic acid, clostridium botulycum (it causes botulism -food poisoning) produce butaric acid.
Which of the following alcoholic drinks are obtained without distillation after fermentation?- a)Wine and Rum
- b)Rum and Brandy
- c)Wine and Beer
- d)Whisky and Rum
Correct answer is option 'C'. Can you explain this answer?
Which of the following alcoholic drinks are obtained without distillation after fermentation?
a)
Wine and Rum
b)
Rum and Brandy
c)
Wine and Beer
d)
Whisky and Rum
|
Prasenjit Pillai answered |
Depending upon the type of the raw material used for fermentation and type of processing different types of alcoholic drinks are obtained. Wine and Beer are produced without distillation.
The most important of the symbiotic nitrogen fixing bacteria which forms nodules on the roots of legume plants is _____.- a)Aspergillus
- b)Streptococcus
- c)Penicillium
- d)Rhizobium
Correct answer is option 'D'. Can you explain this answer?
The most important of the symbiotic nitrogen fixing bacteria which forms nodules on the roots of legume plants is _____.
a)
Aspergillus
b)
Streptococcus
c)
Penicillium
d)
Rhizobium
|
Abhishek Choudhary answered |
Rhizobium is a nitrogen fixing bacteria found in the nodule of leguminous plants root. It increases the fertility of soil.
First organic acid produced by microbial fermentation is_________.- a)Tartaric acid
- b)Citric acid
- c)Lactic acid
- d)Acetic acid
Correct answer is option 'C'. Can you explain this answer?
First organic acid produced by microbial fermentation is_________.
a)
Tartaric acid
b)
Citric acid
c)
Lactic acid
d)
Acetic acid
|
Krishna Iyer answered |
- The first organic acid produced by microbial fermentation was lactic acid.
- Lactic acid is produced by the anaerobic respiration of glucose.
Treatment of waste water is done by- a)Virus
- b)Heterotrophic microbes
- c)Protozoa
- d)Autotrophic microbes
Correct answer is option 'B'. Can you explain this answer?
Treatment of waste water is done by
a)
Virus
b)
Heterotrophic microbes
c)
Protozoa
d)
Autotrophic microbes
|
|
Rohan Singh answered |
Heterotrophic bacteria use organic compounds as an energy and carbon source for synthesis. A term commonly used instead of heterotroph is “saprophyte” which refers to an organism that lives on dead or decaying organic matter. The heterotrophic bacteria are grouped into three classifications, depending upon their action toward free oxygen.
1. Aerobes : Require free dissolved oxygen to live and multiply.
2. Anaerobes : Oxidize organic matter in the complete absence of dissolved oxygen.
3. Facultative : Bacteria are a class of bacteria which use free dissolved oxygen when available but can also respire and multiply in its absence, e.g. Escheichia coli.
Assertion: Biofertilizers are organisms that enrich the nutrient quality of the soil.
Reason: Organic farming is the farming technique in which no chemical is used as fertilizers or insecticides.
- a)Assertion is correct but reason is incorrect.
- b)Assertion is incorrect but reason is correct.
- c)Both assertion and reason are incorrect.
- d)Both assertion and reason are correct but reason is not explanation of assertion.
Correct answer is option 'D'. Can you explain this answer?
Assertion: Biofertilizers are organisms that enrich the nutrient quality of the soil.
Reason: Organic farming is the farming technique in which no chemical is used as fertilizers or insecticides.
Reason: Organic farming is the farming technique in which no chemical is used as fertilizers or insecticides.
a)
Assertion is correct but reason is incorrect.
b)
Assertion is incorrect but reason is correct.
c)
Both assertion and reason are incorrect.
d)
Both assertion and reason are correct but reason is not explanation of assertion.
|
Hansa Sharma answered |
Both assertion and reason are correct statements but the reason is not the correct explanation of the assertion.
Hence, the correct option is D.
NCERT Reference: Page no. 187 of topic “10.6 MICROBES AS BIOFERTILISERS” of chapter 10.
NCERT Reference: Page no. 187 of topic “10.6 MICROBES AS BIOFERTILISERS” of chapter 10.
The most common fungal partners of mycorrhiza are ______ species.- a)Frankia
- b)Azotobacter
- c)Azolla
- d)Glomus
Correct answer is option 'D'. Can you explain this answer?
The most common fungal partners of mycorrhiza are ______ species.
a)
Frankia
b)
Azotobacter
c)
Azolla
d)
Glomus
|
Priyanka Sharma answered |
- Mycorrhiza is a symbiotic association between fungus and angiosperms.
- The most common fungal partners of mycorrhiza are the Glomus species.
The main source of bio-fertilizers are- a)Only bacteria
- b)Only cyanobacteria
- c)Only fungi
- d)Bacteria, fungi and cyanobacteria
Correct answer is option 'D'. Can you explain this answer?
The main source of bio-fertilizers are
a)
Only bacteria
b)
Only cyanobacteria
c)
Only fungi
d)
Bacteria, fungi and cyanobacteria
|
Prashanth Dasgupta answered |
Bio-fertilizer enriches the nutrient in the soil. The main sources of bio-fertilizers are bacteria, fungi and cyanobacteria.
Identify the fungus with medicinal importance.- a)Agaricus
- b)Cercospora
- c)Saccharomyces
- d)Penicillium
Correct answer is option 'D'. Can you explain this answer?
Identify the fungus with medicinal importance.
a)
Agaricus
b)
Cercospora
c)
Saccharomyces
d)
Penicillium
|
Payal Sharma answered |
The answer Is D
because it is source of penicillin. a widely used antibiotic(B lactam antibiotic).
penicillin is anti bacterial drug
because it is source of penicillin. a widely used antibiotic(B lactam antibiotic).
penicillin is anti bacterial drug
Heterocysts that take part in nitrogen fixation occur in- a)Nostoc
- b)Polysiphonia
- c)Ulothrix
- d)Fucus
Correct answer is option 'A'. Can you explain this answer?
Heterocysts that take part in nitrogen fixation occur in
a)
Nostoc
b)
Polysiphonia
c)
Ulothrix
d)
Fucus
|
|
Mubeena Akhter answered |
Heterocysts contain nitrogenase enzyme which helps to carry out nitrogen fixation.Nostoc show symbiotic association with corralloid roots of cycas and carries out nitrogen fixation.
Ethanol is commercially produced through a particular species of- a)Trichoderma
- b)Saccharomyces
- c)Clostridium
- d)Aspergillus
Correct answer is option 'B'. Can you explain this answer?
Ethanol is commercially produced through a particular species of
a)
Trichoderma
b)
Saccharomyces
c)
Clostridium
d)
Aspergillus
|
Snehal Shah answered |
Saccharomyces is an yeast which is used to ferment sugar to produce ethanol in absence of oxygen or by anaerobic respiration.
Methanogens growing anaerobically on cellulosic material produce- a)Methane and hydrogen
- b)Methane and carbon dioxide
- c)Methane, carbon dioxide and hydrogen.
- d)Methane
Correct answer is option 'C'. Can you explain this answer?
Methanogens growing anaerobically on cellulosic material produce
a)
Methane and hydrogen
b)
Methane and carbon dioxide
c)
Methane, carbon dioxide and hydrogen.
d)
Methane
|
Pioneer Academy answered |
Methanogens are bacteria which grow on cellulosic material and produce a large amount of methane along with CO2 and H2.For example: Methanobacterium
Methanogens are the bacteria found in cattle dung (gobar) and in anaerobic sludge during sewage treatment. They grow anaerobically on cellulosic material and produce a large amount of methane (the main constituent of biogas) along with CO2 and H2. These methanogens are grown on slurry which comprises of cattle dung where they act upon the dung and lead to its breakdown and release of gases like methane and carbon-dioxide. Thus, methanogens are used in biogas production.
Methanogens are the bacteria found in cattle dung (gobar) and in anaerobic sludge during sewage treatment. They grow anaerobically on cellulosic material and produce a large amount of methane (the main constituent of biogas) along with CO2 and H2. These methanogens are grown on slurry which comprises of cattle dung where they act upon the dung and lead to its breakdown and release of gases like methane and carbon-dioxide. Thus, methanogens are used in biogas production.
Which of the following infectious disease cannot be controlled by antibiotics?- a)Whooping cough
- b)Diphtheria
- c)Pneumonia
- d)Common cold
Correct answer is option 'D'. Can you explain this answer?
Which of the following infectious disease cannot be controlled by antibiotics?
a)
Whooping cough
b)
Diphtheria
c)
Pneumonia
d)
Common cold
|
Pallabi Reddy answered |
Common cold is an infectious disease caused by virus. It cannot be controlled by antibiotics as antibiotics are not effective against viral disease.
Rennin used in the cheese industry is- a)Alkaloid
- b)Enzyme
- c)Antibiotic
- d)Inhibitor
Correct answer is option 'B'. Can you explain this answer?
Rennin used in the cheese industry is
a)
Alkaloid
b)
Enzyme
c)
Antibiotic
d)
Inhibitor
|
|
Poornima Poori answered |
Reninn also called as chymosin protein digesting enzymes that curdles milk by transforming caseinigen into indulge casein it is found only in the fourth stomach of cud chewing animals such as cows its action extend the period in which milk is retained in the stomach of the young animal in animal that reninn milk is coagulated by the action of person as the case in humans A commercial form of reninn and rennet is used in manufacturing cheese and preparing junket also .
Which one of the following microbes is used in the commercial production of ethanol?- a)Streptococcus spp.
- b)Clostridium butyricum
- c)Trichoderma polysporum
- d)Saccharomyces cerevisiae
Correct answer is option 'D'. Can you explain this answer?
Which one of the following microbes is used in the commercial production of ethanol?
a)
Streptococcus spp.
b)
Clostridium butyricum
c)
Trichoderma polysporum
d)
Saccharomyces cerevisiae
|
|
Ishita Joshi answered |
Microbe Used in Commercial Production of Ethanol
The microbe used in the commercial production of ethanol is Saccharomyces cerevisiae.
Explanation
Saccharomyces cerevisiae is a yeast that is commonly used in the fermentation process to produce ethanol. It is a single-celled organism that feeds on sugar and converts it into alcohol and carbon dioxide. In the production of ethanol, Saccharomyces cerevisiae is added to a mixture of sugar and water, which is then left to ferment for a period of time. During this process, the yeast consumes the sugar and produces ethanol as a by-product.
Advantages of Using Saccharomyces cerevisiae
There are several advantages to using Saccharomyces cerevisiae in the production of ethanol:
1. High Yield: Saccharomyces cerevisiae is known for its high ethanol yield, which makes it a popular choice for commercial producers.
2. Fast Fermentation: Saccharomyces cerevisiae is a fast-fermenting yeast, which means that it can produce ethanol quickly.
3. Easy to Handle: Saccharomyces cerevisiae is easy to handle and can be stored for long periods of time.
4. Cost-effective: Saccharomyces cerevisiae is a cost-effective option for ethanol production.
Conclusion
In conclusion, Saccharomyces cerevisiae is the microbe used in the commercial production of ethanol. It is a fast-fermenting yeast that is known for its high ethanol yield and is cost-effective to use.
The microbe used in the commercial production of ethanol is Saccharomyces cerevisiae.
Explanation
Saccharomyces cerevisiae is a yeast that is commonly used in the fermentation process to produce ethanol. It is a single-celled organism that feeds on sugar and converts it into alcohol and carbon dioxide. In the production of ethanol, Saccharomyces cerevisiae is added to a mixture of sugar and water, which is then left to ferment for a period of time. During this process, the yeast consumes the sugar and produces ethanol as a by-product.
Advantages of Using Saccharomyces cerevisiae
There are several advantages to using Saccharomyces cerevisiae in the production of ethanol:
1. High Yield: Saccharomyces cerevisiae is known for its high ethanol yield, which makes it a popular choice for commercial producers.
2. Fast Fermentation: Saccharomyces cerevisiae is a fast-fermenting yeast, which means that it can produce ethanol quickly.
3. Easy to Handle: Saccharomyces cerevisiae is easy to handle and can be stored for long periods of time.
4. Cost-effective: Saccharomyces cerevisiae is a cost-effective option for ethanol production.
Conclusion
In conclusion, Saccharomyces cerevisiae is the microbe used in the commercial production of ethanol. It is a fast-fermenting yeast that is known for its high ethanol yield and is cost-effective to use.
The term antibiotic was first used by- a)Pasteur
- b)Lister
- c)Waksman
- d)Flemming
Correct answer is option 'C'. Can you explain this answer?
The term antibiotic was first used by
a)
Pasteur
b)
Lister
c)
Waksman
d)
Flemming
|
Anjana Sharma answered |
Selman Waksman, the microbiologist who discovered streptomycin, first used the word "antibiotic" in the medical sense in 1943. Science historian Howard Markel talks about how it was actually a naval officer who first coined "antibiotic" in 1860, to describe an opposition to the belief in life beyond Earth
Maximum number of antibiotics are got from any group except for- a)Fungi
- b)Viruses
- c)Actinomycetes
- d) Eubacteria
Correct answer is option 'B'. Can you explain this answer?
Maximum number of antibiotics are got from any group except for
a)
Fungi
b)
Viruses
c)
Actinomycetes
d)
Eubacteria
|
Jakke Ashok answered |
Antibiotics does not work for viruses because antibiotics attack cell wall but viruses do not have cell wall
Secondary treatment of sewage is also called?- a)Biological treatment
- b)Final treatment
- c)Chemical treatment
- d)Physical treatment
Correct answer is option 'A'. Can you explain this answer?
Secondary treatment of sewage is also called?
a)
Biological treatment
b)
Final treatment
c)
Chemical treatment
d)
Physical treatment
|
Maya Sengupta answered |
Secondary treatment of sewage is also called biological treatment because in this treatment aeration of sewage water is done that increase the microbes that decompose the organic materials in sewage water.
Assertion: Dough used for making food such as dosa and idli is fermented by bacterial.Reason: The puffed-up appearance of dough is due to the production of lactic acid.- a)Both assertion and reason are incorrect
- b)Assertion is correct but reason is incorrect
- c)Assertion is incorrect but reason is correct
- d)Both assertion and reason are correct
Correct answer is option 'B'. Can you explain this answer?
Assertion: Dough used for making food such as dosa and idli is fermented by bacterial.
Reason: The puffed-up appearance of dough is due to the production of lactic acid.
a)
Both assertion and reason are incorrect
b)
Assertion is correct but reason is incorrect
c)
Assertion is incorrect but reason is correct
d)
Both assertion and reason are correct
|
Mehul Iyer answered |
Dough used for making food such as dosa and idli is fermented by bacterial. The puffed-up appearance of dough is due to the production of carbon dioxide gas.
Humulin is a_____.- a)Vitamin
- b)Fat
- c)Protein
- d)Carbohydrates
Correct answer is option 'C'. Can you explain this answer?
Humulin is a_____.
a)
Vitamin
b)
Fat
c)
Protein
d)
Carbohydrates
|
Rajesh Datta answered |
Humulin is protein that contains insulin isophane and insulin regular. It’s a manmade hormone that lowers the blood sugar level in blood.
Monascus purpureus is a yeast used commercially in the production of- a)Blood cholesterol lowering statins
- b)Streptokinase for removing clots from the blood vessels
- c)Ethanol
- d)Citric acid
Correct answer is option 'A'. Can you explain this answer?
Monascus purpureus is a yeast used commercially in the production of
a)
Blood cholesterol lowering statins
b)
Streptokinase for removing clots from the blood vessels
c)
Ethanol
d)
Citric acid
|
Arnav Iyer answered |
Monascus purpureus is Yeast used commercially in the production of blood cholesterol lowering statins. Blood cholesterol is responsible for a number of heart disease.
A sewage treatment process in which a part of the decomposer bacteria present in the wastes are recycled into the starting of the process is called- a)Cyclic treatment
- b)Primary treatment
- c)Activated sludge treatment
- d)Tertiary treatment
Correct answer is option 'C'. Can you explain this answer?
A sewage treatment process in which a part of the decomposer bacteria present in the wastes are recycled into the starting of the process is called
a)
Cyclic treatment
b)
Primary treatment
c)
Activated sludge treatment
d)
Tertiary treatment
|
Mamali . answered |
The activated sludge process is a type of wastewater treatment process for treating sewage or industrial wastewater using aeration and a Biological floc composed of bacteria and protozoa.Thats it.
Which one of the following is used as biological insecticide?- a)Mazra Poka
- b)Caterpillar
- c)Silkmoth
- d)Tiger beetle
Correct answer is option 'D'. Can you explain this answer?
Which one of the following is used as biological insecticide?
a)
Mazra Poka
b)
Caterpillar
c)
Silkmoth
d)
Tiger beetle
|
Arya Khanna answered |
Tiger beetle is a large group of beetles known for their aggressive predatory habits and running speed. They are used as biological insecticides in organic farming practices.
Probiotics are- a)Live microbial food supplement
- b)New kind of food allergens
- c)Cancer inducing microbes
- d)Safe antibiotics
Correct answer is option 'A'. Can you explain this answer?
Probiotics are
a)
Live microbial food supplement
b)
New kind of food allergens
c)
Cancer inducing microbes
d)
Safe antibiotics
|
Dr. Sunny Trivedi answered |
Probiotics are live bacteria and yeasts that are good for you, especially your digestive system. We usually think of these as germs that cause diseases. But your body is full of bacteria, both good and bad. Probiotics are often called "good" or "helpful" bacteria because they help keep your gut healthy. You can find probiotics in supplements and some foods, like yogurt. Doctors often suggest them to help with digestive problems. When you lose "good" bacteria in your body, for example after you take antibiotics, probiotics can help replace them. They can help balance your "good" and "bad" bacteria to keep your body working the way it should.
During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undergraded?- a)Lipids
- b)Lignin
- c)Cellulose
- d)Hemi-cellulose
Correct answer is option 'B'. Can you explain this answer?
During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undergraded?
a)
Lipids
b)
Lignin
c)
Cellulose
d)
Hemi-cellulose
|
Dipanjan Mehta answered |
During anaerobic decomposition of organic wastes by bacteria biogas is produced but lignin do not get decomposed by these bacteria and left over in biogas plants.
Bioactive molecule that is used as an immunosuppressive agent in organ-transplant patient obtained from Trichoderma polysporum is- a)Cyclosporine
- b)Cyclosporin A
- c)Tetracycline
- d)Homulin
Correct answer is option 'B'. Can you explain this answer?
Bioactive molecule that is used as an immunosuppressive agent in organ-transplant patient obtained from Trichoderma polysporum is
a)
Cyclosporine
b)
Cyclosporin A
c)
Tetracycline
d)
Homulin
|
Soumya Ahuja answered |
Cyclosporin A is used as an immunosuppressive agent in organ-transplant patient obtained from Trichoderma polysporum fungus.
Cyanobacteria serves as important biofertilizers in the fields of- a)Rice
- b)Maize
- c)Wheat
- d)Sugar cane
Correct answer is option 'A'. Can you explain this answer?
Cyanobacteria serves as important biofertilizers in the fields of
a)
Rice
b)
Maize
c)
Wheat
d)
Sugar cane
|
|
Ashwini Shah answered |
Cyanobacteria are isolated, identified, multiplied and used as an inoculums in fogg's medium from rice field soil sample experiment. This element is usually supplied to the rice crop as the commercially available fertilizer urea.
Organisms called Methanogens are most abundant in a____________.- a)Cattle yard
- b)Sulphur rock
- c)Polluted water
- d)Hot spring
Correct answer is option 'A'. Can you explain this answer?
Organisms called Methanogens are most abundant in a____________.
a)
Cattle yard
b)
Sulphur rock
c)
Polluted water
d)
Hot spring
|
Lekshmi Banerjee answered |
Methanogens is present in cow dung that produces methane gas. It is most common in cattle yard that provide unique smell in surrounding areas.
Organic farming does not include:- a)green manures
- b)chemical fertilisers
- c)farmyard manures
- d)compost
Correct answer is option 'B'. Can you explain this answer?
Organic farming does not include:
a)
green manures
b)
chemical fertilisers
c)
farmyard manures
d)
compost
|
Shivkumar Tandale. answered |
Organic farming includes all fertilizers made by biotic components and which are not artificial synthesise it includes green manure,farmyard manure, compost , cattle dung etc. so the option is B)
Select the correct option to fill up the blanks.
(i) ___________are used in detergent formulations and are helpful in removing oily stains from the laundry.
(ii) _____________are ripened by growing Penicillium roqueforti on them.
(iii) ___________are produced without distillation whereas,__________are produced by distillation of the fermented broth.
(iv) ___________antibiotic was used to teat American soldiers wounded in world war II.
(v) _______is also called as Kusht rog.
- a)(i) Lipases (ii) Camebert Cheese (iii) Whisky and rum, wine and beer (iv) Penicillin (v) Leprosy
- b)(i) Lipases (ii) Roquefort cheese (iii) Whisky and rum, wine and beer (iv) Penicillin (v) Leprosy
- c)(i) Streptokinase (ii) Roquefort cheese (iii) Wine and beer, Whisky and rum (iv) Streptomycin (v) Whooping cough
- d)(i) Amylase (ii) Swiss cheese (iii) Whisky and rum, wine and beer (iv) Penicillin (v) Diphtheria
Correct answer is option 'B'. Can you explain this answer?
Select the correct option to fill up the blanks.
(i) ___________are used in detergent formulations and are helpful in removing oily stains from the laundry.
(ii) _____________are ripened by growing Penicillium roqueforti on them.
(iii) ___________are produced without distillation whereas,__________are produced by distillation of the fermented broth.
(iv) ___________antibiotic was used to teat American soldiers wounded in world war II.
(v) _______is also called as Kusht rog.
(i) ___________are used in detergent formulations and are helpful in removing oily stains from the laundry.
(ii) _____________are ripened by growing Penicillium roqueforti on them.
(iii) ___________are produced without distillation whereas,__________are produced by distillation of the fermented broth.
(iv) ___________antibiotic was used to teat American soldiers wounded in world war II.
(v) _______is also called as Kusht rog.
a)
(i) Lipases (ii) Camebert Cheese (iii) Whisky and rum, wine and beer (iv) Penicillin (v) Leprosy
b)
(i) Lipases (ii) Roquefort cheese (iii) Whisky and rum, wine and beer (iv) Penicillin (v) Leprosy
c)
(i) Streptokinase (ii) Roquefort cheese (iii) Wine and beer, Whisky and rum (iv) Streptomycin (v) Whooping cough
d)
(i) Amylase (ii) Swiss cheese (iii) Whisky and rum, wine and beer (iv) Penicillin (v) Diphtheria
|
Lavanya Menon answered |
Lipases are used in detergent formulations and are helpful in removing oily stains from the laundry.
Roquefort cheese are ripened by growing Penicillium roqueforti on them.
Wine and beer are produced without distillation whereas, whiskey, brandy and rum are produced by distillation of the fermented broth.
Penicillin antibiotic was used to teat American soldiers wounded in World War II.
Leprosy is also called as Kusht rog.
Roquefort cheese are ripened by growing Penicillium roqueforti on them.
Wine and beer are produced without distillation whereas, whiskey, brandy and rum are produced by distillation of the fermented broth.
Penicillin antibiotic was used to teat American soldiers wounded in World War II.
Leprosy is also called as Kusht rog.
Assertion: A small part of activated sludge is pumped back into aeration tank to serve as the inoculum.
Reason: Remaining part of the sludge is pumped into large tanks called anaerobic sludge digester.
- a)Assertion is correct but reason is incorrect
- b)Both assertion and reason is incorrect
- c)Both assertion and reason are correct
- d)Assertion is incorrect and reason is correct
Correct answer is option 'C'. Can you explain this answer?
Assertion: A small part of activated sludge is pumped back into aeration tank to serve as the inoculum.
Reason: Remaining part of the sludge is pumped into large tanks called anaerobic sludge digester.
a)
Assertion is correct but reason is incorrect
b)
Both assertion and reason is incorrect
c)
Both assertion and reason are correct
d)
Assertion is incorrect and reason is correct
|
|
Sakshi Bajaj answered |
Assertion: A small part of activated sludge is pumped back into aeration tank to serve as the inoculum.
Reason: Remaining part of the sludge is pumped into large tanks called anaerobic sludge digester.
Explanation:
Activated sludge process is a biological treatment process used in wastewater treatment plants. In this process, wastewater is mixed with a microbial culture called activated sludge, which contains microorganisms that break down organic matter present in wastewater.
The given assertion is correct because a small part of activated sludge is pumped back into the aeration tank to maintain the microbial population and to provide a fresh supply of microorganisms to break down organic matter in wastewater.
The given reason is also correct because the remaining part of the sludge is pumped into large tanks called anaerobic sludge digesters. These tanks are designed to operate in the absence of oxygen, and the sludge is decomposed by anaerobic bacteria to produce biogas, which can be used as a source of energy.
Therefore, both the assertion and reason are correct, and option C is the correct answer.
In summary:
- Activated sludge process uses a microbial culture to break down organic matter in wastewater.
- A small part of activated sludge is pumped back into the aeration tank to maintain the microbial population.
- The remaining part of the sludge is pumped into anaerobic sludge digesters to produce biogas.
- Both the assertion and reason are correct.
Reason: Remaining part of the sludge is pumped into large tanks called anaerobic sludge digester.
Explanation:
Activated sludge process is a biological treatment process used in wastewater treatment plants. In this process, wastewater is mixed with a microbial culture called activated sludge, which contains microorganisms that break down organic matter present in wastewater.
The given assertion is correct because a small part of activated sludge is pumped back into the aeration tank to maintain the microbial population and to provide a fresh supply of microorganisms to break down organic matter in wastewater.
The given reason is also correct because the remaining part of the sludge is pumped into large tanks called anaerobic sludge digesters. These tanks are designed to operate in the absence of oxygen, and the sludge is decomposed by anaerobic bacteria to produce biogas, which can be used as a source of energy.
Therefore, both the assertion and reason are correct, and option C is the correct answer.
In summary:
- Activated sludge process uses a microbial culture to break down organic matter in wastewater.
- A small part of activated sludge is pumped back into the aeration tank to maintain the microbial population.
- The remaining part of the sludge is pumped into anaerobic sludge digesters to produce biogas.
- Both the assertion and reason are correct.
Which of the following is a gram-negative bacterium?- a)Streptomyces coelicolor
- b)Escherichia coli
- c)Bacillus subtilis
- d)Amycolatopsis orientali
Correct answer is option 'B'. Can you explain this answer?
Which of the following is a gram-negative bacterium?
a)
Streptomyces coelicolor
b)
Escherichia coli
c)
Bacillus subtilis
d)
Amycolatopsis orientali
|
Vaibhav Basu answered |
Escherichia coli is a gram-negative bacterium. The bacterium that do not retain the Gram stain are called gram negative bacteria.
Which one is the correct sequence of steps involved in sewage treatment?
i. Filtration
ii. Biological treatment
iii. Sedimentation
iv. Chlorination- a)Step i, ii, iii and iv
- b)Step i, iii, ii and iv
- c)Step ii, iii, i and iv
- d)none
Correct answer is option 'B'. Can you explain this answer?
Which one is the correct sequence of steps involved in sewage treatment?
i. Filtration
ii. Biological treatment
iii. Sedimentation
iv. Chlorination
i. Filtration
ii. Biological treatment
iii. Sedimentation
iv. Chlorination
a)
Step i, ii, iii and iv
b)
Step i, iii, ii and iv
c)
Step ii, iii, i and iv
d)
none
|
Abhijeet Goyal answered |
Steps involved in sewage treatment are filtration, sedimentation, biological treatment and chlorination. First two steps are called primary treatment of sewage and last two steps are called secondary treatment of sewage.
Symbiotic association of fungi with plant are called as- a)Mycobacteria
- b)Mycovectro
- c)Mycorrhiza
- d)Lichens
Correct answer is option 'C'. Can you explain this answer?
Symbiotic association of fungi with plant are called as
a)
Mycobacteria
b)
Mycovectro
c)
Mycorrhiza
d)
Lichens
|
|
Lekshmi Banerjee answered |
Symbiotic association of fungi with angiosperm plant root is called mycorrhiza. Most of the plants have this kind of relation. The fungus obtains some sugar from the plant and plant get minerals and water absorbed by fungi.
The residue left after methane production from cattle dung is- a)Used as manure
- b)Buried in landfills
- c)Used in civil construction
- d)Burnt
Correct answer is option 'A'. Can you explain this answer?
The residue left after methane production from cattle dung is
a)
Used as manure
b)
Buried in landfills
c)
Used in civil construction
d)
Burnt
|
Vijay Bansal answered |
The raw material for biogas production is excreta (dung) of cattle. The biogas plant consists of a concrete tank (10-15 feet deep) in which bio-wastes are collected and slurry of dung is fed. A floating cover is placed over the slurry, which keeps on rising as the gas is produced in the tank due to the microbial activity. Methano bacterium in the dung act on the bio-wastes to produce bio-gas. The gas produced is supplied to nearby houses by an outlet. Through another outlet, the spent slurry is removed to be used as manure.
Some hyperthermophilic organisms that grow in highly acidic (pH-2) habitats belong to the two groups- a)Cyanobacteria and diatoms
- b)Protists and mosses
- c)Liverworts and yeasts
- d)Eubacteria and archaea
Correct answer is option 'D'. Can you explain this answer?
Some hyperthermophilic organisms that grow in highly acidic (pH-2) habitats belong to the two groups
a)
Cyanobacteria and diatoms
b)
Protists and mosses
c)
Liverworts and yeasts
d)
Eubacteria and archaea
|
Ishaan Menon answered |
The organisms that can grow at higher temperature are called hyperthermophilic organisms. These organisms belong to group Eubacteria and Archaea.
Lactic acid is formed by the process of- a)Fermentation
- b)Glycolysis
- c)HMP Pathway
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Lactic acid is formed by the process of
a)
Fermentation
b)
Glycolysis
c)
HMP Pathway
d)
None of these
|
|
Azeem answered |
Fermentation is the process of producing ATP in the absence of oxygen, through glycolysis alone. that the glycolysis breaks a glucose molecule into two pyruvate molecules, producing a net gain of two ATP and two NADH molecules.
Enzyme immobilization is____________.- a)Changing pH
- b)Conversion of active enzyme into inactive enzyme
- c)Conversion of inactive enzyme into active enzyme
- d)Providing enzyme with protective covering
Correct answer is option 'D'. Can you explain this answer?
Enzyme immobilization is____________.
a)
Changing pH
b)
Conversion of active enzyme into inactive enzyme
c)
Conversion of inactive enzyme into active enzyme
d)
Providing enzyme with protective covering
|
Abhishek Desai answered |
Enzyme immobilization is the process whereby the movement of enzymes cells organelles etc. in space is completely or severely restricted usually resulting in a water soluble enzyme thus providing enzyme with protective covering.
Azolla is used as a biofertilizers because it- a)Multiplies very fast to produce massive
- b)Has association of mycorrhiza
- c)Has association of nitrogen fixing Rhizobium
- d)Has association of nitrogen fixing Cyanobacteria
Correct answer is option 'D'. Can you explain this answer?
Azolla is used as a biofertilizers because it
a)
Multiplies very fast to produce massive
b)
Has association of mycorrhiza
c)
Has association of nitrogen fixing Rhizobium
d)
Has association of nitrogen fixing Cyanobacteria
|
Subhankar Datta answered |
Azolla is used as a biofertilizers because it has association of nitrogen fixing Cyanobacteria. They increase the fertility of soil without any chemical fertilizers.
Which one of the following is not used in organic farming?- a)Snail
- b)Glomus
- c)Oscillatoria
- d)Earthworm
Correct answer is option 'A'. Can you explain this answer?
Which one of the following is not used in organic farming?
a)
Snail
b)
Glomus
c)
Oscillatoria
d)
Earthworm
|
|
Hitakshi Tamta G answered |
Glomus being a mycorrhizal component, earthworm being a vermicompost and Oscillatoria being a nitrogen fixing blue green algae can be used in organic farming. Snail is not used in organic farming.
Thus, the correct answer is option A.
Thus, the correct answer is option A.
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