ENHANCEMENT IN FOOD PRODUCTION NEET 12PYQ
Microbes in Human Welfare NCERT 12 BIOLOGY NEET PYQ
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Microbes in Human Welfare NCERT 12 Biology NEET PYQ
Microbes in human Welfare is the important chapter where we can understand the role of micro-organism in the welfare of human through the use of Micro- organism
Every year in NEET exam of 12 NCERT Biology chapter Microbes in Human welfare almost 2-3 question are asked on this chapter
1) Which of the species does not have the ability to fix atmospheric nitrogen ( AIPMT- 1994)
a) Azotobacter
b) Anabaena
c) Nostoc
d) Spirogyra
Solution – Spirogyra does not have the ability to fix the atmospheric nitrogen
Azotobacter, Anabaena, & Nostoc all have the ability to fix the atmospheric nitrogen
2) In cheese manufacture , the micro organisms are important for ( AIPMT-1994)
1) the Ripening only
2) the souring of milk only
3) the development of resistance to spoilage only
4) both the souring and the ripening processes
Solution – In cheese manufacture the microbes are useful in both the souring and the ripening process
Microbes used in cheese manufacturing are – Lactobacillus & Streptococcus
3) Cochineal insect have proved very useful for ( AIPMT 1996)
a) Cactus prevention
b) Eicchornia prevention
c) weed control
d) parthenium control
Solution – Cochineal insect are useful in in the prevention of Cactus
Cochineal insect-
family – dactylopiidae
Scientific name – Dactylopius coccus
This insect produces Carminic acid
4) A good producer of citric acid is : ( NEET -2013)
a) Saccharomyces
b) Aspergillus
c) Pseudomonas
d) Clostridium
Solution – Aspergillus is good producer of citric acid
5) Microbes used for biocontrol of pest Butterfly caterpillars is ( K. NEET -2013)
a) Saccharomyces cerevisiae
b) Bacillus thuringiensis
c) Streptococcus sp
d) Trichoderma sp
Solution – Bacillus thuringiensis is used for biocontrol of pest butterfly caterpillar
Bacillus thuringiensis ( Bt) –
it is fine example of microbes used in human welfare
it is used in the microbial bio control
6) Which of the following microbe is used in the production of citric acid ( MH- CET- 2014)
a) Aspergillus niger
b) Rhizopus arrhizus
c) Acetobacter aceti
d) Saccharomyces cerevisiae
Solution- Aspergillus is used in the production of citric acid
Some Microbes used in the production of acid –
1) Citric acid – Aspergillus niger
2) Acetic acid – Acetobactor aceti
3) Gluconic acid – Aspergillus niger
7) A Major component of gobar Gas is
a) Ammonia
b) Methane
c) Ethane
d) Butane
Solution – Methane is the main component of the gobar gas
8) Which of the following is being utilized as a Source of biodiesel in the Indian countryside ( AIPMT 2007)
a) Beetroot
b) Sugarcane
c) Pongamia
d) Euphorbia
Solution – Pongamia is being utilized as good source of biodiesel in the Indian countryside
9) Which of the following plant species you would select for the production of bioethanol
a) Zea mays
b) Pongamia
c) Jatropha
d) Brassica
Solution – Jatropha is used for the production of bioethanol
Jatropha –
Scientific name – Jatropha gossypiifolia. L
10) Which of the following is used for Commercial production of Ethanol
a) Clostridium butylicum
b) Lactobacillus
c) Saccharomyces cerevisiae
d) non of the above
Solution – Saccharomyces cerevisiae is used for commercial production of ethanol
it also known as yeast
11) Which of the following Ministry has launched the following plan
1) Ganga Action Plan
2) Yamuna Action Plan
a) Ministry of Agriculture
b) Ministry of Environment and Forest
c) Ministry of corporate
d) None of the above
Solution – The Ganga Action Plan & Yamuna Action Plan are launched by Ministry of Environment and Forest
Ganga Action Plan – it was initiated in 1979 by Government of India
Yamuna Action Plan – https://en.wikipedia.org/wiki/Yamuna_Action_Plan#:~:text=The%20Yamuna%20Action%20Plan%20is,river%20restoration%20projects%20in%20India.
12) Which of the following fungi known to form Symbiotic Association with plants
a) Lactobacillus
b) Staphylococci
c) Penicillium notatum
d) Mycorrhiza
Solution – Mycorrhiza is the fungi known to form Symbiotic association with plants
many members of the genus Glomus form mycorrhiza
13) Which of the following cannot fix atmospheric nitrogen
a) Anabaena
b) Nostoc
c) Oscillatoria
d) Lactobacillus
Solution – Lactobacillus cannot fix atmospheric Nitrogen
14) Propionibacterium sharmanii is associated with which of the following
a) Bread
b) idli
c) Roquefort cheese
d) Swiss Cheese
Solution – The large holes in Swiss cheese are because of production of large amount of CO2 ( Carbon Dioxide) by a bacterium named ” Propionibacterium sharmanii ”
15) Ernest Chain & Howard Florey used full Potential of ….
a) Yeast
b) Penicillin
c) acetic acid
d) None of the above
Solution – Ernest Chain & Howard Florey used full Potential of Penicillin