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Microbes in human welfare : NEET MCQ Questions

Are you looking for NEET MCQ Questions on Microbes in human welfare? If Yes then you are at right place. Here you will find Microbes in human welfare NEET MCQ Questions and Answers, Trivia, Quiz, Interview MCQ & Microbes in human welfare Current Affairs for Competitive Exams like Neet exams, around 30% to 40% of Neet questions are asked from given Microbes in human welfare Mcqs. as you know Questions and Ansers on Microbes in human welfare MCQS is very important for Neet Exam. In this Microbes in human welfare NEET section for Neet competition we are covering NEET MCQ Questions on Microbes in human welfare

Contents

Question 1 : What bacteria are used to make butanol and acetone from starch?

A. Lactobacillus bulgaricus

B. Clostridium acetobutylicum

C. Streptococcus thermophilus

D. Both (a) and (c)

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Question 2 : Based on the product they produce, which of the following is correctly matched?

A. Methanobacterium : Lactic acid

B. Penicillium notatum : Acetic acid

C. Saccharomyces cerevisiae : Ethanol

D. Acetobacter aceti : Antibiotics

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Question 3 : It was mainly due to the efforts of who in India that biogas production technology was developed?

A. Indian Agricultural/ Research Institute (IARI) and Khadi and Village Industries Commission (KVIC)

B. National Botanical Research Institute (NBR1)

C. Indian Council of Medical Research (ICMR)

D. Indian Council of Agricultural Research (ICAR)

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Question 4 : What bacterial group is exploited in the production of biogas?

A. Methogens

B. Methanotrophs

C. Organotrophs

D. Eubacteria

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Question 5 : Anaerobic sludge digesters produce what gases?

A. Methane and CO2 only

B. Methane, Hydrogen Sulphide and CO2

C. Methane, Hydrogen Sulphide and O2

D. Hydrogen Sulphide and CO2

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Question 6 : The most abundant prokaryotes useful to humans for making curd from milk and producing antibiotics are categorised as?

A. Cyanobacteria

B. Archaebacteria

C. Chemosynthetic autotrophs

D. Heterotrophic bacteria

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Question 7 : What vitamin increases in content as milk is converted into curd by lactic acid bacteria?

A. vitamin-C

B. Vitamin-D

C. vitamin-B12

D. vitamin-E

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Question 8 : In our country, besides dung, which weed is recommended for extensive use in biogas production?

A. Mangifera indica

B. Hydrilla

C. Eicchomia crassipes

D. Solanum

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Question 9 : What is normally given to a patient with myocardial infarction when they arrive at the hospital?

A. Penicillin

B. Streptokinase

C. Cyclosporin-A

D. Statins

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Question 10 : Citric acid is produced in industries by which of the following microorganisms?

A. Lactobacillus bulgaricus

B. Penicillium citrinum

C. Aspergillus niger

D. Rhizopus nigricans

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Question 11 : What makes the big holes in Swiss cheese?

A. a machine

B. a bacterium that produces methane gas

C. a bacterium producing a large amount of carbon dioxide

D. a fungus that releases a lot of gases during its metabolic activities

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Question 12 : Pyrethrin is a common ingredient of what?

A. Mosquito coils

B. Fly sprays

C. Mosquito mats

D. All of these

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Question 13 : Which of the following is a common biocontrol agent for the control of plant diseases?

A. Baculovirus

B. Bacillus thuringiensis

C. Glomus

D. Trichoderma

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Question 14 : Alcohol is produced by using which of the following?

A. Bacteria

B. Water moulds

C. Yeasts

D. Slime moulds

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Question 15 : Which of the following statements is true about BOD?

A. The greater the BOD of wastewater, the more is its polluting potential

B. The greater the BOD of wastewater, the less is its polluting potential

C. The lesser the BOD of wastewater, the more is its polluting potential

D. The lesser the BOD of wastewater, the less is its polluting potential

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Question 16 : Alexander Flemming discovered which antibiotic?

A. Streptomycin

B. Tetracycline

C. Penicillin

D. Terramycin

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Question 17 : Rennet is purified by C. Hansen (1874) for commercial use. What is the source of this enzyme?

A. stomach of goat

B. stomach of horse

C. stomach of calf

D. bacteria

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Question 18 : The enzyme that dissolves blood clots in heart attack victims is?

A. PNA

B. TPA

C. NAD

D. RFP

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Question 19 : Gobar gas is more advantageous than conventional utilization as they are?

A. More efficient source of energy

B. Used as good fertilizer

C. Reduces the chances of spreading pathogens

D. All of the above

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Question 20 : Which pair is incorrectly matched?

A. Yeast – ethanol

B. Streptomycetes – antibiotic

C. Coliforms – vinegar

D. Methanogens – gobar gas

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Question 21 : What does biogas consist of?

A. CO + H2 + CO2

B. CH4 + CO + CO2

C. CH4 + COz + H2

D. CO + CO2 + NO2

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Question 22 : In sewage treatment, which of the following removes suspended solids?

A. Secondary treatment

B. Primary treatment

C. Sludge treatment

D. Tertiary treatment

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Question 23 : How can animal excreta and organic waste from the kitchen be most profitably minimized?

A. storing them in underground storage tanks

B. using them for producing biogas

C. vermiculture

D. using them directly as biofertilizers

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Question 24 : Pseudomonas is useful due to its ability to?

A. transfer genes from one plant to another

B. decompose a variety of organic compounds

C. fix atmospheric nitrogen in the soil

D. produce a wide variety of antibiotics

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Question 25 : Mycorrhizae do not help the host plant in what?

A. enhancing its phosphorus uptake capacity

B. increasing its tolerance to drought

C. enhancing its resistance to root pathogens

D. increasing its resistance to insects

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Question 26 : Wastewater BOD is estimated by measuring the amount of?

A. total organic matter

B. biodegradable organic matter

C. oxygen evolution

D. oxygen consumption

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Question 27 : What does Brewer’s yeast lack?

A. diastase and amylase

B. amylase only

C. diastase only

D. maltose

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Question 28 : Sewage is purified by

A. microbes

B. fertilizers

C. antibiotics

D. antiseptics

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Question 29 : Statins, a bioactive molecule, inhibit an enzyme responsible for the synthesis of?

A. carbohydrate

B. protein

C. vitamins

D. cholesterol

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Question 30 : What is a free-living nitrogen-fixing cyanobacterium that forms a symbiotic association with the water fern Azolla?

A. Anabaena

B. Tolypothrix

C. Chlorella

D. Nostoc

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Question 31 : A nitrogen-fixing bacterium that associates loosely with crop roots is?

A. Azotobacter

B. Bacillus polymyxa

C. Clostridium

D. Azospirillum

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Question 32 : Which of the following helps plants absorb phosphorus from the soil?

A. Glomus

B. Rhizobium

C. Frankia

D. Anabaena

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Question 33 : Bacterioviruses are wonderful candidates for?

A. species-specific narrow-spectrum pesticidal applications

B. species-specific broad-spectrum pesticidal applications

C. species-specific narrow spectrum insecticidal applications

D. species-specific broad-spectrum insecticidal applications

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Question 34 : Where are methanogenic bacteria not found?

A. rumen of cattle

B. gobar gas plant

C. bottom of water-logged paddy fields

D. activated sludge

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Question 35 : What is a good producer of citric acid?

A. Pseudomonas

B. Clostridium

C. Saccharomyces

D. Aspergillus

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Question 36 : What is Yeast Saccharomyces cerevisiae used for in industrial production?

A. butanol

B. citric acid

C. tetracycline

D. ethanol

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Question 37 : What do methanogens not produce?

A. oxygen

B. methane

C. hydrogen sulphide

D. carbon dioxide

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Question 38 : What is torulopsis utilis?

A. food yeast

B. microbe used to prepare vaccines

C. used in the synthesis of citric acid

D. used to prepare antibiotic

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Question 39 : What do the guts of cows and buffalos possess?

A. Chlorella spp.

B. Methanogens

C. Cyanobacteria

D. Fucus spp

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Question 40 : Where does vitamin B2 come from?

A. Penicillium

B. Acetobacter

C. Aspergillus

D. Ashbya gossypii

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Question 41 : Which of the following statements about antibiotics is false?

A. The first antibiotic was discovered by Alexander Flemming

B. The term ‘antibiotic’ was coined by S. Waksman in 1942

C. Some persons can be allergic to a particular antibiotic

D. Each antibiotic is effective only against one particular kind of germ

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Question 42 : How is gallic acid obtained?

A. Pseudomonas species

B. Penicillium purpurogenum

C. Aspergillus niger

D. Streptomyces species

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Question 43 : Which organism is used as a biofertilizer for raising soybean crops?

A. Azotobacter

B. Azospirillum

C. Rhizobium

D. Nostoc

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Question 44 : Which of these is a pair of biofertilizers?

A. Azolla and blue-green algae

B. Nostoc and legume

C. Rhizobium and grasses

D. Salmonella & E. coli

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Question 45 : What is the major source of liquid hydrocarbon?

A. Calotropis gigantea

B. Cocos nucifera

C. Euphorbia antisyphilitica

D. Solanum tuberosum

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Question 46 : In paddy fields, what is a common nitrogen fixer?

A. Rhizobium

B. Azospirillum

C. Oscillatoria

D. Frankia

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Question 47 : It is due to the direct action of what that sugar is converted to alcohol during fermentation?

A. temperature

B. micro-organisms

C. zymase

D. the concentration of sugar solution

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Question 48 : Which bacterium contributes to the production of Swiss cheese?

A. Propionibacterium sharmanii

B. Trichoderma polysporum

C. Saccharomyces cerevisiae

D. Aspergillus niger

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Question 49 : If oxygen availability to activated sludge flocs were reduced, what would happen?

A. It will slow down the rate of degradation of organic matter.

B. The centre of flocs will become anoxic, which would cause the death of bacteria and eventually breakage of flocs.

C. Flocs would increase in size as anaerobic bacteria would grow around flocs.

D. Protozoa would grow in large numbers.

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Question 50 : How are microorganisms used in cheese manufacturing?

A. the souring of milk only

B. the ripening only

C. development of resistance to spoilage

D. Both (a) and (b)

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