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Which one of the following is not used in organic farming?[2010]- a)Glomus
- b)Earthworm
- c)Oscillatoria
- d)Snail
Correct answer is option 'D'. Can you explain this answer?
Which one of the following is not used in organic farming?
[2010]
a)
Glomus
b)
Earthworm
c)
Oscillatoria
d)
Snail
|
Tejas Chavan answered |
Organic farming involves use of organic wastes and other biological material along with beneficial microbes to release nutrients to crop to increase the soil fertility in an ecofriendly, and pollution tree environment. Glomus, earthworm and Oscillatoria can be used in organic farming while snail cannot.
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.
An organism used as a biofertilizer for raising soyabean crops is[2011]- a)Azotobacter
- b)Azospirillum
- c)Rhizobium
- d)Nostoc
Correct answer is option 'C'. Can you explain this answer?
An organism used as a biofertilizer for raising soyabean crops is
[2011]
a)
Azotobacter
b)
Azospirillum
c)
Rhizobium
d)
Nostoc
|
Maheshwar Saini answered |
Rhizobium is a nitrogen fixing bacteria, which acts as a biofertilizer in soil to produce soyabean crops.
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 common nitrogen fixer in paddy fields is[2010]- a)Rhizobium
- b)Azospirillum
- c)Oscillatoria
- d)Frankia
Correct answer is option 'B'. Can you explain this answer?
The common nitrogen fixer in paddy fields is
[2010]
a)
Rhizobium
b)
Azospirillum
c)
Oscillatoria
d)
Frankia
|
Krish Chakraborty answered |
The common nitrogen fixer in paddy field is Azospirillum. It is an anaerobic bacteria that forms loose association with roots of paddy crops.
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
Maximum nutritional diversity is found in the group.[2012]- a)Fungi
- b)Animalia
- c)Monera
- d)Plantae
Correct answer is option 'C'. Can you explain this answer?
Maximum nutritional diversity is found in the group.
[2012]
a)
Fungi
b)
Animalia
c)
Monera
d)
Plantae
|
Lalit Yadav answered |
Maximum nutritional diversity is shown by the members of kingdom - Monera. Some of them are autotrophic (e.g. photosynthetic autotrophic or chemosynthetic autotrophic) while the vast majority are heterotrophs (e.g., saprotrophic or parasitic). Ecologically, these may be producers or decomposers.
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.
Which of the following is pair of biofertilizers?[2001]- a)Azolla and BGA
- b)Nostoc and legumes
- c)Rhizobium and grasses
- d)Salmonella and E. coli
Correct answer is option 'A'. Can you explain this answer?
Which of the following is pair of biofertilizers?
[2001]
a)
Azolla and BGA
b)
Nostoc and legumes
c)
Rhizobium and grasses
d)
Salmonella and E. coli
|
Kunal Rane answered |
Azolla and blue green algae- Anabaena form biofertilizer in rice fields.
Which one of the following is an example of carrying out biological control of pests/ diseases using microbes ?
[2012]
- a)Bt - cotton to increase cotton yield
- b)Nucleopolyhedrovirus against white rust in Brassica
- c)Trichoderma sp. against certain plant pathogens
- d)All of above
Correct answer is option 'D'. Can you explain this answer?
Which one of the following is an example of carrying out biological control of pests/ diseases using microbes ?
[2012]
a)
Bt - cotton to increase cotton yield
b)
Nucleopolyhedrovirus against white rust in Brassica
c)
Trichoderma sp. against certain plant pathogens
d)
All of above
|
Prisha Khanna answered |
Biological control of pests/ diseases using microbes involves the use of microorganisms to control and manage pests and diseases in plants.
Bt - cotton to increase cotton yield:
Bt (Bacillus thuringiensis) is a soil bacterium that produces a protein that is toxic to many pest insects. Bt cotton is a genetically modified cotton that produces this protein, which reduces the need for chemical insecticides and increases cotton yield.
Nucleopolyhedrovirus against white rust in Brassica:
Nucleopolyhedrovirus is a virus that infects and kills certain insect pests, including the larvae of the diamondback moth, which is a major pest of Brassica crops. The use of this virus as a biological control agent can help reduce the need for chemical insecticides and improve crop yield.
Trichoderma sp. against certain plant pathogens:
Trichoderma is a genus of fungi that can be used as a biological control agent against certain plant pathogens, including Fusarium, Rhizoctonia, and Pythium species. Trichoderma sp. can colonize plant roots and produce enzymes that help control these pathogens, reducing the need for chemical fungicides and improving plant health.
All of above:
All of the above examples involve the use of microbes as a biological control agent to manage pests and diseases in plants. These methods are environmentally friendly and sustainable and can help reduce the use of chemical pesticides and fungicides, which can have negative impacts on human health and the environment.
Bt - cotton to increase cotton yield:
Bt (Bacillus thuringiensis) is a soil bacterium that produces a protein that is toxic to many pest insects. Bt cotton is a genetically modified cotton that produces this protein, which reduces the need for chemical insecticides and increases cotton yield.
Nucleopolyhedrovirus against white rust in Brassica:
Nucleopolyhedrovirus is a virus that infects and kills certain insect pests, including the larvae of the diamondback moth, which is a major pest of Brassica crops. The use of this virus as a biological control agent can help reduce the need for chemical insecticides and improve crop yield.
Trichoderma sp. against certain plant pathogens:
Trichoderma is a genus of fungi that can be used as a biological control agent against certain plant pathogens, including Fusarium, Rhizoctonia, and Pythium species. Trichoderma sp. can colonize plant roots and produce enzymes that help control these pathogens, reducing the need for chemical fungicides and improving plant health.
All of above:
All of the above examples involve the use of microbes as a biological control agent to manage pests and diseases in plants. These methods are environmentally friendly and sustainable and can help reduce the use of chemical pesticides and fungicides, which can have negative impacts on human health and the environment.
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.
Human insulin is being commercially produced from a transgenic species of[2008]- a)Escherichia
- b)Mycobacterium
- c)Rhizobium
- d)Saccharomyces
Correct answer is option 'A'. Can you explain this answer?
Human insulin is being commercially produced from a transgenic species of
[2008]
a)
Escherichia
b)
Mycobacterium
c)
Rhizobium
d)
Saccharomyces
|
|
Kunal Rane answered |
Human insulin is being commercially produced from a transgenic species of Escherichia coli. E. coli is a bacterium that is commonly found in the lower intestine of warm blooded animals. The bacteria can also be grown easily and its genetics are comparatively simple and easily manipulated, making it one of the best studied prokaryotic model organisms, and an important species in biotechnology.
Which one of the following help in absorption of phosphorus from soil by plants?[2011]- a)Glomus
- b)Rhizobium
- c)Frankia
- d)Anabaena
Correct answer is option 'A'. Can you explain this answer?
Which one of the following help in absorption of phosphorus from soil by plants?
[2011]
a)
Glomus
b)
Rhizobium
c)
Frankia
d)
Anabaena
|
Aniket Chawla answered |
Glomus aggregatum is a mycorrhizal fungus used as a soil inoculant in agriculture and horticulture. Its purpose is to increase the surface area of roots for nutrient absorption like phosphorus.
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.
The aquatic fern, which is an excellent biofertiliser is[1999]- a)Azolla
- b)Salvinia
- c)Marsilia
- d)Pteridium
Correct answer is option 'A'. Can you explain this answer?
The aquatic fern, which is an excellent biofertiliser is
[1999]
a)
Azolla
b)
Salvinia
c)
Marsilia
d)
Pteridium
|
|
Krish Chakraborty answered |
Azolla is a freshwater fern harbouring a bluegreen alga - Anabaena in its leaf cavities. The alga fixes atmospheric nitrogen and releases nitrogenous compounds in leaf cavities. This symbiotic system is the main source of algal biofertilizer in rice fields.
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 thing is not true about antibiotics?[1996]- a)The term “antibiotic” was coined by Selman Waksman in 1942
- b)First antibiotic was discovered by Alexander Flemming
- c)Each antibiotic is effective only against one particular kind of germ
- d)Some persons can be allergic to a particular antibiotic
Correct answer is option 'C'. Can you explain this answer?
Which one thing is not true about antibiotics?
[1996]
a)
The term “antibiotic” was coined by Selman Waksman in 1942
b)
First antibiotic was discovered by Alexander Flemming
c)
Each antibiotic is effective only against one particular kind of germ
d)
Some persons can be allergic to a particular antibiotic
|
Moumita Khanna answered |
'Each antibiotic is effective only against one particular kind of germ' is not correct.
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.
Probiotics are[2007]- a)cancer inducing microbes
- b)new kind of food allergens
- c)live microbial food supplement
- d)safe antibiotics
Correct answer is option 'C'. Can you explain this answer?
Probiotics are
[2007]
a)
cancer inducing microbes
b)
new kind of food allergens
c)
live microbial food supplement
d)
safe antibiotics
|
|
Krish Chakraborty answered |
Probiotics are defined as live microorganisms, including Lactobacillus species, Bifidobacterium species and yeasts, that may beneficially affect the host upon ingestion by improving the balance of the intestinal microflora. The dietary use of live microorganisms has a long history.
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.
A patient brought to a hospital with myocardial infarction is normally immediately given :[2012]- a)Penicillin
- b)Streptokinase
- c)Cyclosporin-A
- d)Statins
Correct answer is option 'B'. Can you explain this answer?
A patient brought to a hospital with myocardial infarction is normally immediately given :
[2012]
a)
Penicillin
b)
Streptokinase
c)
Cyclosporin-A
d)
Statins
|
|
Maheshwar Saini answered |
Streptokinase is immediately given to dissolve the thrombus carring myocardial infarction
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.
Farmers have reported over 50% higher yields of rice by using the biofertilizer[1998]- a)Azolla pinnata
- b)Cyanobacteria
- c)Legume-Rhizobium symbiosis
- d)Mycorrhiza
Correct answer is option 'A'. Can you explain this answer?
Farmers have reported over 50% higher yields of rice by using the biofertilizer
[1998]
a)
Azolla pinnata
b)
Cyanobacteria
c)
Legume-Rhizobium symbiosis
d)
Mycorrhiza
|
|
Aniket Chawla answered |
Farmers have reported over 50% higher yields of rice by using the biofertilizer Azolla pinnata.
A common biocontrol agent for the control of plant diseases is[2010]- a)Baculovirus
- b)Bacillus thuringiensis
- c)Glomus
- d)Trichoderma
Correct answer is option 'D'. Can you explain this answer?
A common biocontrol agent for the control of plant diseases is
[2010]
a)
Baculovirus
b)
Bacillus thuringiensis
c)
Glomus
d)
Trichoderma
|
Pooja Saha answered |
A common biocontrol agent for control of plant diseases is Trichoderma. Trichoderma is a tree living fungus that exert biocontrol over several plant pathogens for the control of plant diseases. It is the natural method of pest and pathogen control.
Chapter doubts & questions for Microbes in Human Welfare - Topic-wise MCQ Tests for NEET 2025 is part of NEET exam preparation. The chapters have been prepared according to the NEET exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for NEET 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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Topic-wise MCQ Tests for NEET
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