Practice Test


Q1) Chemical produced by mould Penicillium notatum did not allow the growth of Staphylococci bacteria, thus penicillin was established as antibiotic. Who established its effective potential? Show Answer


Q2) Before disposal, sewage is treated in sewage treatment plants (STPs). It is done by which microbes present naturally in sewage: Show Answer


Q3) Greater the BOD of sewage water, its polluting ability is: Show Answer


Q4) Lady bird beetle and dragon flies are useful to get rid of Show Answer


Q5) A biological control being developed for use in treatment of plant diseases is Trichoderma. It is a: Show Answer


Q6) Adeno virus, a bacteriophage causes Show Answer


Q7) Prions are: Show Answer


Q8) Wine and beer are produced: Show Answer


Q9) Which of the following acts competitively inhibiting enzyme responsible for synthesis of cholesterol: Show Answer


Q10) Sunn hemp fibres are obtained from: Show Answer


Q11) Associated symbiosis is shown by: Show Answer


Q12) Which of the following is a free living bacterium? Show Answer


Q13) Cochineal insects have been employed in checking overgrowth of: Show Answer


Q14) Materials of biological origin which are commonly used to maintain and improve soil fertility are: Show Answer


Q15) VAM is characterized by: Show Answer


Q16) Pick up the free living cyanobacterium: Show Answer


Q17) Mycorrhizal hyphae prove useful to the plant by: Show Answer


Q18) Select the one which is not related to Rhizobium: Show Answer


Q19) Farmyard manure is prepared from: Show Answer


Q20) Which one of the following is free living nitrogen fixing cyanobacterium? Show Answer


Q21) Vesicular Arbuscular Mycorrhizae are: Show Answer


Q22) Biopesticides are: Show Answer


Q23) Major sources of biofertilizers are: Show Answer


Q24) Pheromones are secreted: Show Answer


Q25) Mycorrhiza is a: Show Answer


Q26) The overgrowth of cacti was checked by the introduction of: Show Answer


Q27) An ideal pesticide is one which: Show Answer


Q28) Which of the following alkaloids are good plant insecticides? Show Answer


Q29) The compound extracted from neem which keeps away the insects is: Show Answer


Q30) Which of the following is a good fire wood source in India? Show Answer


Q31) Which of the following are biofuels? Show Answer


Q32) A petroleum plant is: Show Answer


Q33) Pyrolysis of wood produces: Show Answer


Q34) Main source of energy for a plant is: Show Answer


Q35) For biogas production, besides dund which of the following weed is recommended in our country? Show Answer


Q36) Non-renewable substance or resource is: Show Answer


Q37) Biogas production rate is limited by: Show Answer


Q38) The first step in biogas production is: Show Answer


Q39) Fuel wood is: Show Answer


Q40) Which of the following is the non-conventional source of energy? Show Answer


Q41) HMP is a bioenergy obtained from: Show Answer


Q42) Biogas contains: Show Answer


Q43) Raising of crops for the production of ethanol is known as: Show Answer


Q44) Which of the following can be used in place of petrol? Show Answer


Q45) Which of the following are energy crops? Show Answer


Q46) In which of the following countries alcohol has been successfully used as motor fuel? Show Answer


Q47) In which of the following forms animal energy is available? Show Answer


Q48) Which of the following liquid hydrocarbon? Show Answer


Q49) Gas produced as a result of anaerobic fermentation of agricultural wastes is: Show Answer


Q50) Social forestry is: Show Answer


Q51) Farmers have reported over 50% higher yields of rice by using the biofertilizer: Show Answer


Q52) Biological control component is central to advacnced agricultural production. Which of the following is used as a third generation pesticide? Show Answer


Q53) Which one of the following is non-symbiotic biofertilizer? Show Answer


Q54) A biofertilizer is: Show Answer


Q55) Which organism serves as a biofertilizer Show Answer


Q56) The phenomenon of using a predator for controlling a pest is: Show Answer


Q57) Crop rotation is carried out for: Show Answer


Q58) Nitrogen fixation is: Show Answer


Q59) Leghaemoglobin occurs in: Show Answer


Q60) BGA is chiefly used as fertilizer in: Show Answer


Q61) Which element plays an important role in nitrogen fixation? Show Answer


Q62) Mycorrhiza represents: Show Answer


Q63) The biological control of agricultural pests, unlike, chemical control is: Show Answer


Q64) The neem is used as a natrual insecticide because: Show Answer


Q65) Which of the following helps in absorption of phosphorus from soil by plants? Show Answer


Q66) Secondary sewage treatment is mainly a: Show Answer


Q67) Which of the following is mainly produced by the activity of anaerobic bacteria on sewage? Show Answer


Q68) The most common substrate used in distilleries for the production of ethanol is: Show Answer


Q69) Ethanol is commercially produced through a particular species of: Show Answer


Q70) A prokaryotic autotrophic nitrogen fixing symbiont is found in: Show Answer


Q71) Which one of the following is not a biofertilizer? Show Answer


Q72) Which one of the following is a correct statement about biogas? Show Answer


Q73) For biogas production beside during, which of the following is used? Show Answer


Q74) Besides dung the weed which can be used in biogas production is: Show Answer


Q75) Both power and manure are provided by: Show Answer


Q76) The country pioneer in production of fuel alcohol is: Show Answer


Q77) With the exception of water, which one is possible the most important accessory chemical substance in industrial process? Show Answer


Q78) Product obtained from the plants of which family can be alternative of liquid fluid? Show Answer


Q79) Which one of the following being utilized as a source of biodiesel in the Indian countryside? Show Answer


Q80) Composited manure consists of: Show Answer


Q81) Which of the following is required for better nitrogen fixation of Rhizobium? Show Answer


Q82) Azolla enriches rice field with nitrogen due to its association with: Show Answer


Q83) Transgenic crops are useful as they have genes of: Show Answer


Q84) The total consumption of fertilizers in India is about: Show Answer


Q85) The requirement of fertilizers by the end of century would be: Show Answer


Q86) Biopesticides include: Show Answer


Q87) A biodegradable insecticide has been obtained from: Show Answer


Q88) Phosphobacteria contains: Show Answer


Q89) Biological control means: Show Answer


Q90) Ectomycorrhiza absorbs and stores N, P, K and Ca in: Show Answer


Q91) Biocontrol of larvae of mosquito is done by: Show Answer


Q92) A straight fertilizer is the one which is: Show Answer


Q93) Who is credited with identifying petrocrops? Show Answer


Q94) Methane content of biogas is: Show Answer


Q95) Aquatic plant used in biogas generation is: Show Answer


Q96) Energy plantations differ from energy cropping in being: Show Answer


Q97) Producer gas is used for: Show Answer


Q98) Wood gas is used as: Show Answer


Q99) Leucaena, a new plant for social forestry, is recommended for: Show Answer


Q100) Various resources of bioenergy are: Show Answer


Q101) The first step during biomass production is: Show Answer


Q102) The lignin present in biomass is not digested then which controls the rate of biogas production? Show Answer


Q103) Microbes are diverse which include -
A. Bacteria
B. Mosses
C. Protozoans
D. Fungi Show Answer


Q104) Microbes are present in -
A. Soil
B. Air
C. Water
D. Thermal springs Show Answer


Q105) Which of the following bacteria help in nitrogen fixation from atmosphere?
A. Azotobacter
B. Rhizobium
C. Azospirillum
D. Lactobacillus Show Answer


Q106) Yeast have been used for the commercial production of -
A. wine
B. whisky
C. ethanol
D. curd Show Answer


Q107) The distillation of the fermented broth is required in the formation of -
A. rum
B. beer
C. brandy
D. whisky Show Answer


Q108) Symbiotic asociation is exhibited by -
A. mycorrhiza
B. Rhizobium
C. heterocyst
D. Yeast Show Answer


Q109) Methanogens grow anaerobically on cellulosic material and produce -
A. methane
B. oxygen
C. carbon dioxide
D. hydrogen Show Answer


Q110) The technology of biogas production in India has been developed by the efforts of -
A. Khadi and Village Industries Commission (KVIC)
B. Indian Council of Agricultural Research (ICAR)
C. Indian Agricultural Research Institute (IARI)
D. Indian Council of Medical Research (ICMR) Show Answer


Q111) Which of the following cyanobacteria can fix atmospheric nitrogen?
A. Nostoc
B. Anabaena
C. Oscillatoria
D. Yeast Show Answer


Q112) Which of the following food items is produced by fermentation by the microbes?
A. Idli
B. Dosa
C. Toddy
D. Cheese Show Answer


Q113) Microbes are found Show Answer


Q114) The nutritive media for growing bacteria and other microorganisms in the laboratory is called Show Answer


Q115) Which of the following bacteria convert milk into curd? Show Answer


Q116) Which role is played by lactic acid bacteria (LAB) in our stomach? Show Answer


Q117) The dough used for making bread is fermented by Show Answer


Q118) Which of the following is used in preparing cheese? Show Answer


Q119) The large vessels for growing microbes on an industrial scale are called Show Answer


Q120) The gas responsible for puffing-up appearance of dough comes from Show Answer


Q121) Which of the following antibiotics discovered first? Show Answer


Q122) Acetic acid is produced by a Show Answer


Q123) Citric acid is produced by Show Answer


Q124) Which of the following bacteria has a role in removing clots from our blood vessels? Show Answer


Q125) Statins used for lowering blood-cholesterol level are extracted from Show Answer


Q126) The bioactive molecule cyclosporin. A is used in Show Answer


Q127) Cyclosporin A is produced from Show Answer


Q128) The primary treatment of sewage involves Show Answer


Q129) The amount of oxygen required by the microbes in the decomposition of organic matter is called Show Answer


Q130) The mixture of gases released during anaerobic digestion of sludge is called Show Answer


Q131) Biogas contains Show Answer


Q132) The symbiotic association between fungi and roots of higher plants is called Show Answer


Q133) The organisms which are used to enrich the nutrient quality of the soil are called Show Answer


Q134) The bacteria was discovered by Show Answer


Q135) The bacterium that commonly lives in animal and human intestines is Show Answer


Q136) Streptomycin is produced from Show Answer


Q137) The main difference between Gram-positive and Gram-negative bacteria lies in Show Answer


Q138) Which one of the following sets includes bacterial diseases? Show Answer


Q139) Streptomyces rimosus is the source of the antibiotic Show Answer


Q140) During which stage of sewage treatment microbes are used? Show Answer


Q141) Which of the following serve as biofertilizer in paddy fields? Show Answer


Q142) Which antibiotic was extensively used to treat American soldiers wounded in World War II? Show Answer


Q143) The solids which settle after primary treatment of sewage are called Show Answer


Q144) Given below are three statements (A-B) each with one or more blanks. Select the option which correctly fills the blanks in the statement.
Statements :
A. The dough which is used to prepare idli and dosa is fermented by ______ and ______. The puffy appearance of dough is due to the release of _______ by these microorganisms.
B. Microbes are also used in commercial production of certain organic acids. Butyric acid is produced by _______ and lactic acid is produced by ________. Show Answer


Q145) Given below are three statements (A-B) each with one or more blanks. Select the option which correctly fills the blanks in the statement.
Statements :
A. Bioactive molecule, _______ is used as immunospuppressive agent in organ transplant patients, it is produced by the fungus _______.
B. Primary treatment of sewage involves physical removal of small and large particles through ________. Show Answer


Q146) Given below are two statements (A-B) each with one or more blanks. Select the option which correctly fills the blanks in the statements.
Statements :
A. Terramycin is an antibiotic isolated from ______ and interfere with the _______ of disease causing bacteria.
B. Microorganisms (e. g. bacteria, yeast, filamentous fungi, algae etc.) that can be cultured on a commercial scale in fermentor and used as a food source or as animal feed are called ________. Show Answer


Q147) Given below are three statements (A-B) each with one or more blanks. Select the option which correctly fills the blanks in the statement.
Statements :
A. Statins produced by the yeast, ________ have been commercialized as blood cholesterol lowering agents.
B. __________ contains insecticidal crystal proteins thurioside, which is stomach poison and highly insect specific. Show Answer


Q148) Given below are three statements (A-B) each with one or more blanks. Select the option which correctly fills the blanks in the statement.
Statements :
A. __________ a traditional drink of some parts of South India is made by fermenting sap from palms.
B. Cirtric acid is obtained through the fermentation carried out by ______ and ______on sugary syrups.
C. In ________ the fungus forms a mantle on the surface of the roots. Show Answer


Q149) Which of the following statements is correct?
A. Single cell protein is rich in high quality proteins but poor in fat.
B. BOD is the amount of oxygen that would be consumed if all the inorganic matter in one litre of water were oxidised by bacteria.
C. Trichoderma sp are free living fungi that are effective biocontrol agents of several pathogens.
D. Baculoviruses are pathogens that attack insects and other arthropods.
E. Bacillus thuringiensis is first used biopesticide.
F. Lactase enzyme is used in alcoholic fermentation.
G. Mycorrhiza is a symbiotic association between fungi e.g. Glomus and vascular plant. Show Answer


Q150) Benefits of mycorrhizae are -
A. Resistance to root-borne pathogens
B. Tolerance to salinity and absorption of phosphorus
C. Tolerance to drought
D. Overall increase in the plant growth and development Show Answer


Q151) In cheese manufacture, the micro-organisms are used for Show Answer


Q152) Which one(s) is/are correct about Cyclosporin A? Show Answer


Q153) Antibiotics are used to treat diseases like Show Answer


Q154) Choose the correct sequence of microbes involved in biogas production Show Answer


Q155) Baculoviruses (Nucleopolyhedrovirus) does not show Show Answer


Q156) Enzyme which has the fibrinolytic effect is Show Answer


Q157) Swiss cheese is associated with which of the following? Show Answer


Q158) The advantage, the fungi derive from mycorrhizal association with plants Show Answer


Q159) Which of the following statements about mycorrhizae is false?
I. In ectomycorrhizae, association between the fungus and plant is less intimate than in endomycorrhizae.
II. The mycorrhizal association of fungus and the plant may have had importance in the evolution of land plant.
III. The mycorrhizal association is a mutualistic symbiosis.
IV. Fungal partner is associated with the only roots of the higher plants (like angiosperms).
V. Only advanced modern plants such as angiosperms possess mycorrhizae. Show Answer


Q160) Types of alcoholic beverages obtained depend on Show Answer


Q161) Which of the following is false? Show Answer


Q162) Mycorrhiza is found in Show Answer


Q163) Which of the following enzymes is not used in making detergent? Show Answer


Q164) The reason that the chemical/synthetic fertilizers should be replaced by biofertilizers is that the former Show Answer


Q165) Select the correct statement Show Answer


Q166) Organic farming includes Show Answer


Q167) Consider the following statements (A-D) about organic farming:
A. Utilizes genetically modified crops like Bt cotton.
B. Uses only naturally produced inputs like compost.
C. Does not use pesticides and urea.
D. Produces vegetables rich in vitamins and minerals.
Which of the above statements are correct? Show Answer


Q168) In paddy field which of the following severs as an important biofertilizer Show Answer


Q169) Which of the following is false about the Mycorrhiza? Show Answer


Q170) Read the following statement having two blanks (A-B).
"A drug used for (A) patients is obtained from a species of the organisms (B)".
The one correct option for the two blanks is Show Answer


Q171) The pathogen Microsporum responsible for ringworm disease in humans belongs to the same Kingdom of organisms as that of Show Answer


Q172) In gobar gas, the maximum amount is that of Show Answer


Q173) Consider the following four statements (a-d) and select the option which includes all the correct ones only.
A. Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc.
B. Body weight-wise the microorganism Methylophilus methylotrophus may be able to produce several times more proteins than the cows per day.
C. Common button mushrooms are a very rich source of vitamin C.
D. A rice variety has been developed which is very rich in calcium. Show Answer


Q174) The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorized as Show Answer


Q175) Monascus purpureus is a yeast used commercially in the production of Show Answer


Q176) A patient brought to a hospital with myocardial infarction is normally immediately given Show Answer


Q177) Which one of the following microbes forms symbiotic association with plants and helps them n their nutrition Show Answer


Q178) Which one of the following single organism or the pair of organisms is correctly assigned of its or their named taxonomic group Show Answer


Q179) Which one of the following is an example of carrying out biological control of pests/diseases using microbes? Show Answer


Q180) During sewage treatment, biogases are produced which include Show Answer


Q181) Which one of the following statement is not true. Show Answer


Q182) What gases are produced in anaerobic sludge digesters Show Answer


Q183) Identify the set which has all organisms used in biological control of pests Show Answer


Q184) During waste water treatment, trickling filter is used for Show Answer


Q185) Biogas can be good substitute for Show Answer


Q186) Which of the following is wrongly matched in the given table? Show Answer


Q187) Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from Show Answer


Q188) Which one of the following micro-organisms is used as biofertilizer? Show Answer


Q189) Powdery mildew of wheat is caused by species of Show Answer


Q190) Toddy is made by …A… of sap from palm tree by …B… . Here A and B refers to Show Answer


Q191) Which of the following belongs to free living nitrogen fixing bacteria?
I. Rhizobium
II . Azospirillum
III. Azotobacter
Choose the correct option Show Answer


Q192) Which one of the following is biofuel? Show Answer


Q193) Quinine used for treatment of malarial fever is extracted from Show Answer


Q194) Which role is played by Lactobacillus in our stomach? Show Answer


Q195) ‘Himgiri’ developed by hybridization and selection for disease resistance against rust pathogens is a
variety of Show Answer


Q196) The pesticide most persistent in the soil is Show Answer


Q197) Besides dung, the weed that can be used in biogas production is Show Answer


Q198) Which one of the following is a petroleum plant? Show Answer


Q199) An organism used as biofertiliser for raising any legume crop is Show Answer


Q200) Rice bran oil is used as an Show Answer


Q201) Yeast have been used for the commercial production of
I. ethanol II. bread III. cheese
Choose the correct option Show Answer


Q202) The plant, which is used for studying hybrid vigour or heterosis is Show Answer


Q203) Sewage contains large amounts of …A… and …B… . Here A and B refers to Show Answer


Q204) Which of the following is a wrong matching of a microbe and its industrial product? Show Answer


Q205) Removal of anthers of some flowers during plant breeding is Show Answer


Q206) The plant of Triticum aestivum is Show Answer


Q207) Physical removal of large and small stable solid particles from the sewage through filtration and
sedimentation is called Show Answer


Q208) Cocaine alkaloid is obtained from Show Answer


Q209) First man-made cereal (i.e., triticale) is Show Answer


Q210) Organic farming includes
I. use of biofertilisers and biopesticides
II. crop rotation
III. locally developed pest resistant varieties
Choose the correct option Show Answer


Q211) Which of the following plant yields oil and fibre both? Show Answer


Q212) Trichoderma species, free living fungi, are present in root ecosystems are potentially useful as Show Answer


Q213) Which of the following plants are used as green manure in crop, fields and in sandy soils? Show Answer


Q214) Mule is a product of Show Answer


Q215) The pioneer country in the production of fuel-alcohol is Show Answer


Q216) The disease in poultry, which reduces immunity and spreads through contaminated food is Show Answer


Q217) Which stage of silkworm secretes silk? Show Answer


Q218) Morphine, which is used as an analgesic is obtained from Show Answer


Q219) By which of the following methods, new and better varieties of plants can be formed? Show Answer


Q220) Methanogens are found in
I. organic acid
II. rumen of cattle
III. butanal
IV. anaerobic sludge
Choose the correct option Show Answer


Q221) LSD is obtained from Show Answer


Q222) Which of the following food items are produced through fermentation by the microorganisms?
I. Idli
II. Dosa
III. Toddy
IV. Cheese
Choose the correct option Show Answer


Q223) Roquefort cheese is formed by ripening with the fungi for a particular Show Answer


Q224) A drug used for …A… patients is obtained from a species of the organism ….B…
Choose the correct option for A and B Show Answer


Q225) Which one of the following is correct? Show Answer


Q226) Which of the following has been covered under the broad patent category? Show Answer


Q227) Consider the following statement
I. Biochemical Oxygen Demand (BOD) represents the amount of dissolved oxygen that would be consumed
if all the organic matter in 1 L of water were oxidized by microorganism
II. Low value of BOD means the water is either normal or less polluted by organic matter
III. High value of BOD means the water in highly polluted by organic matter
Which of statement given above are correct? Show Answer


Q228) Which of the following is exhaustible but limited source of energy? Show Answer


Q229) The natural method of pest and pathogen control involving use of viruses, bacteria and other insects is
called Show Answer


Q230) The function of penicillin as an antibiotic was established by Show Answer


Q231) Big holes in Swiss cheese are made by Show Answer


Q232) …A… is a methane rich fuel gas produced by …B… breakdown with the help of …C… bacteria. Here A, B and
C refers to Show Answer


Q233) The medicinal plants is Show Answer


Q234) Which is produced during anaerobic fermentation of agricultural wastes? Show Answer


Q235) Insecticide obtained from neem plant is Show Answer


Q236) In poultry birds, nasal and eye discharges with foul smell, acute respiratory problem and inflamed and
swollen eyes are the symptoms of Show Answer


Q237) Which of the following serve as biofertiliser in paddy fields? Show Answer


Q238) Which one of these microbes is used in the commercial production of butyric acid? Show Answer


Q239) Primary treatment is the Show Answer


Q240) Benefits of mycorrhizae are
I. resistance to root borne pathogen
II. tolerance to salinity and pathogen
III. overall increase in the plant growth and development
Choose the correct option Show Answer


Q241) Biogas is a mixture of inflammable gases like Show Answer


Q242) Biogas production from waste biomass with the help of methanogenic bacteria is Show Answer


Q243) In silk fibre, the central core is made up of Show Answer


Q244) Which of the following fibres is not a plant product? Show Answer


Q245) The most important of the symbiotic nitrogen fixing bacteria, which forms nodules on the roots of legume
plants is Show Answer


Q246) Read the following statement having two blanks (A and B)
A drug used for …A… patients is obtained from a species of the organism ….B… . It helps in clearing blood
clots inside the blood vessels.
The one correct option for the two blanks are Show Answer


Q247) Study the following related to uses of plants and identify the correct match for sorghum and cotton
respectively.
I. Blood purification and organic fertilizer.
II. Animal feed and paper industry.
III. Vitamin-B and cosmetics.
IV. Explosives and organic fertilizer. Show Answer


Q248) Consider the following statements about methanogens bacteria
I. Methanogen bacteria are commonly found in the anaerobic sludge formed during sewage treatment
II. These bacteria are also occur in rumen of the cattle where they act upon cellulosic material to
breakdown cellulose
III. They play a very important role in the nutrition of cattle by digesting cellulosic material
Which of the statement given above are correct? Show Answer


Q249) Microorganisms or microbes are found in Show Answer


Q250) Emasculation is concerned with Show Answer


Q251) From which part of coconut coir is obtained? Show Answer


Q252) Microorganism such as Lactobacillus and others are commonly called Show Answer


Q253) Which of the following crops have been brought to India from New world? Show Answer


Q254) Most recent insecticides in India are Show Answer


Q255) Breeding of crops with high levels of minerals, vitamins and proteins is called Show Answer


Q256) Chicks of the first week in the brooder hover are usually susceptible to which one of the following disease? Show Answer


Q257) The most common fungal partner of mycorrhiza belongs to genus Show Answer


Q258) Disadvantages of chemical agents are
I. chemicals are toxic and harmful to human beings and animals
II. chemical pollute the environment and plants
III. weedicides used to remove weeds also pollute the soil
Choose the correct option Show Answer


Q259) Bacillus thuringiensis (Bt) strains have been used for designing novel Show Answer


Q260) Brewer’s yeast is Show Answer


Q261) The free-living fungus Trichoderma can be used for Show Answer


Q262) Father of green revolution in India is Show Answer


Q263) Which of the following can be controlled by using biopesticides? Show Answer


Q264) Microbes are used in
I. primary treatment of sewage
II. secondary treatment of sewage
III. anaerobic sludge digesters
IV. production of biogas
Choose the correct option Show Answer


Q265) Desired improved varieties of economically useful crops are raised by Show Answer


Q266) Which one of the following is not a nitrogen-fixing organism? Show Answer


Q267) Which of the following shows maximum genetic diversity in India? Show Answer


Q268) In crop improvement programme, haploids are of great importance because they Show Answer


Q269) Pollution from animal excreta and organic waste from kitchen can be most profitably minimised by Show Answer


Q270) Cellulose fibre is obtained from Gossypium Show Answer


Q271) Biogas production is carried out by Show Answer


Q272) Methanogens, growing anaerobically on cellulosic material, produce Show Answer


Q273) Triticale, the first man-made cereal crop, has been obtained by crossing wheat with Show Answer


Q274) Mycorrhiza does not help the host plant in Show Answer


Q275) Which industrial products are synthesized from microbes?
I. Antibiotics II. Fermented beverages
III. Bioactive molecules IV. Enzyme
Choose the correct option Show Answer


Q276) A collection of plants and seeds having diverse alleles of all the genes of a crop is called Show Answer


Q277) The quickest method of plant breeding is Show Answer


Q278) Nitrifying bacteria Show Answer


Q279) Consider the following statements
I. Ladybirds and dragonflies are used to get rid of aphids and mosquitoes
II. The bacteria Bacillus thuringiensis (Bt) are used to control butterfly
III. Trichoderma sp. free living fungi, are present in root ecosystems where they act against several plant
pathogens
IV. Rhizobium is a symbiotic bacterium that lives in the stem of legumes
Which of the statements given above are correct? Show Answer


Q280) Cultivation of Bt cotton has been much in the news. The prefix Bt means Show Answer


Q281) Which of the following cyanobacteria can fix atmospheric nitrogen?
I. Vilvox II. Oscillatoria
III. Nostoc IV. Anabaena
Choose the correct option Show Answer


Q282) Bacterial fertilizer is Show Answer


Q283) Which of the following organisms is used in the production of beverages like wine, beer, whisky brandy or
rum? Show Answer


Q284) The chemical substances produced by some microbes, which can kill or retard the growth of other
microbes are called Show Answer


Q285) Which of the following is/are the approache(s) for biological farming?
I. Familiarity with various life-forms inhabiting the field
II. Gain knowledge about the life cycles, patterns of feeding and habitat of predators and pests
Choose the correct option Show Answer


Q286) Toddy is traditional drink of Show Answer


Q287) Process of biogas production is an Show Answer


Q288) Gambusia fish is Show Answer


Q289) Biogas produced by fermentation of manure, sewage, cattle dung, etc., predominantly comprises Show Answer


Q290) Trichoderma sp. free living fungi has proved a useful microorganism of Show Answer


Q291) Biogas is pathogen free because Show Answer


Q292) The water soluble protein associated with silk thread is Show Answer


Q293) Most nutritious among the following is Show Answer


Q294) Which gas is released during the process of fermentation that gives the puffy appearance to dough for
making bread Show Answer


Q295) Real product of apiculture is Show Answer


Q296) Integrated Pest Management (IPM) discourages the excessive use of Show Answer


Q297) An organism used as a biofertilizer for raising soyabean crop production is Show Answer


Q298) Roquefort cheese is formed by ripening with the fungi Show Answer


Q299) A straight fertilizer is the one, which is Show Answer


Q300) Which of the following microbe convert milk into curd? Show Answer


Q301) Consider the following statements about organic farming
I. Organic farming promotes the use of crop rotations and cover crops and encourages balanced
host/predator relationships
II. Integrated pest and weed management and soil conservation systems are valuable tools on an organic
farm
II. Organic farming protects the environment, minimize soil degradation and erosion and decrease
pollution
Which of the statements given above are correct? Show Answer


Q302) Saccharomyces cerevisiae is used for commercial production of Show Answer


Q303) In the sewage treatment bacterial flocs are allowed to sediment in a settling-tank. This sediment is called
as Show Answer


Q304) Genetic diversity in agricultural crops is threatened by Show Answer


Q305) Which one of the following is used as biological insecticide? Show Answer


Q306) During the primary treatment of sewage, solid particles that settle down are called Show Answer


Q307) Triticum aestivum, the common bread wheat is Show Answer


Q308) BOD of waste water is estimated by measuring the amount of Show Answer


Q309) Producer gas differs from biogas in having Show Answer


Q310) Bacillus thuringiensis is used as Show Answer


Q311) The high yielding hybrid crop varieties to exploit hybrid vigour, the farmers to purchase fresh hybrid seed
every year because Show Answer


Q312) The residue left after methane production from cattle dung is Show Answer


Q313) Morphine obtained from opium is Show Answer


Q314) Bacillus thuringiensis is used to control Show Answer


Q315) Which of the following statements regarding baculoviruses as bio-control agents is/are correct?
I. Baculoviruses are pathogens that attack insects and other arthropods
II. Most of these biocontrol agents belong to the genus Nucleopolyhedro virus
III. They do not harm plants mammals, birds, fish and other non-target insects
IV. Baculoviruses are helpful in Integrated Pest Management (IPM) programme, in which beneficial insects
are conserved
Choose the correct option Show Answer


Q316) Opium is obtained from which the part of Papaver somniferum? Show Answer


Q317) Which one of the following genus forms symbiotic association with plants and helps them in their
nutrition? Show Answer


Q318) By anaerobic process, the cow dung is used to produce Show Answer


Q319) India’s wheat yield revolution in the 1960s was possible primarily due to Show Answer


Q320) Introduced plants in new localities must show adaptations called Show Answer


Q321) The world’s highly prized wool yielding ‘Pashmina’ breed is Show Answer


Q322) Which one of the following pesticides is banned now-a-days? Show Answer


Q323) The technology of biogas production from cow dung was developed in India largly by the efforts of Show Answer


Q324) Which of the following is wrongly matched? Show Answer


Q325) Rauwolffia is obtained from which part of the plant? Show Answer


Q326) Which one of the following is the American poultry breed? Show Answer


Q327) …A… released by LAB during growth coagulate and partially digest …B… . Here A and B refers to Show Answer


Q328) Which of the following is correct?
I. Wine and beer are produced without distillation of fermented broth
II. Whisky, brandy and rum are produced by distillation of the fermented broth
III. Wine and beer are produced by distillation of the fermented broth
IV. Whisky, brandy and rum are produced without distillation of the fermented broth
Choose the correct option Show Answer


Q329) Which one of the following is not used in organic farming? Show Answer


Q330) Which type of endosperm will be formed on hybridization of diploid female plant and tetraploid male
plant? Show Answer


Q331) Protoplasts of two different species are used in Show Answer


Q332) An important drug is obtained from the bark of Show Answer


Q333) Morphine is obtained from Show Answer


Q334) Which type of honey bees are useful for apiary industries in India? Show Answer


Q335) A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into
the starting of the process is calledCyclic treatment Show Answer


Q336) Consider the following statements
I. Yeast used in making bread and beverages is a prokaryotic fungus
II. Streptokinase is produced by Streptococcus and modified by genetic engineering is used as a clot
buster
III. Lipases are added in detergent for removing only stains from laundry
IV. Pectinases are used in clearing fruit juices
Which of the statement given above are correct? Show Answer


Q337) The main sources of biofertilisers are Show Answer


Q338) Cotyledons and testa are edible parts of Show Answer


Q339) Cotton fibre is basically a type of Show Answer


Q340) Name the group of microbes used in biogas production Show Answer


Q341) An undistillled alcoholic beverage produced from grain-mesh fermentation is Show Answer


Q342) Cytosporin-A an immunosuppressive drug is produced by the fungus Show Answer


Q343) Choose the cat fish from the following Show Answer


Q344) ‘Jaya’ and ‘Ratna’ developed for green revolution in India are the varieties of Show Answer


Q345) Select the correct statement from the once given below Show Answer


Q346) Agricultural chemicals include Show Answer


Q347) Which of the following plants is used as biofertilizer? Show Answer


Q348) Reserpine is obtained from Show Answer


Q349) The microscopic proteinaceous infectious agents are Show Answer


Q350) Biochemical Oxygen Demand (BOD) in a river water Show Answer


Q351) For cryopreservation, plant materials are frozen at Show Answer


Q352) Activated sludge have the ability to settle quickly so that it can Show Answer


Q353) Which of the following are the part or example of symbiotic mutualistic association?
I. Yeast
II. Rhizobium
III. Mycorrhiza
IV. Oscillatoria Show Answer


Q354) High content of lysine is present in Show Answer


Q355) Opium is obtained from Show Answer


Q356) The part of castor seed that yields oil is Show Answer


Q357) Which one of the following is a viral disease of poultry? Show Answer


Q358) Which one of the following is a disease of poultry? Show Answer


Q359) Baculoviruses do not show harmful effect on
I. plants II. Mammals
III. bird IV. Non-target insects
Choose the correct option Show Answer


Q360) Atropa belladonna yields medicine used for Show Answer


Q361) The terminator gene technology causes Show Answer


Q362) What will your conclude, when a cow is crossed to a bull and the female progeny is yielding more milk
than its mother? Show Answer


Q363) CFCL is situated at Show Answer


Q364) Insecticides usually act upon Show Answer


Q365) Which of the following is used as biofertiliser?
I. Cyanobacteria
II. Yeast
III. Symbiotic bacteria
IV. Free living bacteria
Choose the correct option Show Answer


Q366) A commonly used mastigator called ‘supari’ is obtained from the plant Show Answer


Q367) Which of the following is not used as a biopesticide? Show Answer


Q368) Which of the following is used as ‘clotbuster’. For removing clots from blood vessels of patient who have
undergone myocardial infartion Show Answer


Q369) Which of the following is an endogenic species of earthworm? Show Answer


Q370) Which bacteria are utilized in gobar gas plant? Show Answer


Q371) Energy cropping is Show Answer


Q372) What would happen if oxygen availability to activated sludge flocs is reduced? Show Answer


Q373) Asafoetida is obtained from Show Answer


Q374) The plant most commonly used as green manure is Show Answer


Q375) What happened when we inoculate Rhizobium in the wheat field? Show Answer


Q376) In the biological treatment of sewage the masses of bacteria held together by fungal filament to form mesh
like structures called as Show Answer


Q377) Toddy is
I. a traditional drink of Southern India
II. made by fermentation of sap from palm trees by bacteria
Which of the statements given above about toddy is/are correct? Show Answer


Q378) The symbiotic association of fungi with the roots of higher plants is called Show Answer


Q379) A common biocontrol agent for the control of plant diseases Show Answer


Q380) Three crops that contribute maximum to global food grain production are Show Answer


Q381) Pomato is Show Answer


Q382) The large holes in swiss cheese are due to production of a large amount of …A… by a bacterium …B… . Here
A and B refers to Show Answer


Q383) The primary treatment of waste water involves the removal of Show Answer


Q384) Green manures are prepared from Show Answer


Q385) Crossing of unrelated pure breeding animals of different traits within the same breed is called Show Answer


Q386) Heroin is obtained from plant of family Show Answer


Q387) Disease resistance crop is obtained by Show Answer


Q388) Mating between two individuals differing in genotypes to produce genetic variation is called Show Answer


Q389) The nutritive medium for growing bacteria and many fungi in the laboratory is called Show Answer


Q390) Which of the following statement is correct? Show Answer


Q391) Mycorrhiza promotes plant growth by Show Answer


Q392) The starter or inoculum is added to the fresh milk in order to convert milk into curd, the term starter or
inoculum here refers to Show Answer


Q393) Baker’s yeast is Show Answer


Q394) Which one is not produced by aquaculture? Show Answer


Q395) The purpose of biological treatment of waste water is to Show Answer


Q396) International Rice Research Institute (IRRI) is located at Show Answer


Q397) Regulation to restrict the movement of diseased plant material from one place to another are called Show Answer


Q398) Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria Show Answer


Q399) Plants having similar genotypes produced by plant breeding are called Show Answer


Q400) Quinine is obtained from Show Answer


Q401) Which of the following plan has been initiated by the Ministry of Environment and Forests to protect
rivers from water pollution? Show Answer


Q402) In rice fields biological nitrogen fixation is chiefly brought by Show Answer


Q403) Which of the following is correctly matched? Show Answer


Q404) Sewage or municipal waste should not be directly passed into rivers, streams and other water bodies
because
I. it contains human excreta and other organic waste
II. it contains a number of pathogenic microbes
Which of the statement given above is/are correct? Show Answer


Q405) Turpentine oil is obtained from Show Answer


Q406) Curd is formed by adding a small amount of curd to milk, which acts as a Show Answer


Q407) Statins used as blood cholesterol lowering agents are extracted from Show Answer


Q408) Triticum vulgare has been found to be presently evolved as Show Answer


Q409) A good example for organic fertilizer, which improves phosphorus uptake, is Show Answer


Q410) Consider the following statements about Bt
I. The bacteria Bacillus thuringiensis (Bt) are used to control butterfly catterpillers
II. Fresh spores of Bt are mixed with water and sprayed on seeds such as brassicas and fruit trees
III. Insect larvae, after eating these are killed by the toxin released in their gut
IV. Bt toxin genes have been introduced into plants to provide resistance to pests
Which of the statements given above are correct? Show Answer


Q411) Hybrid vigour is mostly due to Show Answer


Q412) Protein in silk thread is Show Answer


Q413) Which of the following is a dual purpose breed? Show Answer


Q414) Which is correctly matched? Show Answer


Q415) ‘Heterosis’ is related to Show Answer


Q416) Which hexaploid wheat is used to make bread? Show Answer


Q417) Somatic hybridization is a technique of Show Answer


Q418) Which one of the following antibiotic was extensively used to treat American soldiers wounded in World
War-II? Show Answer


Q419) Blue-green algae are mainly used as biofertilisers in the field of which crop? Show Answer


Q420) A water fern, which is used as a green manure in rice fields is Show Answer


Q421) IPM (Integrated pest Management) involves Show Answer


Q422) The part of cotton producing pure cellulose is Show Answer


Q423) Mosascus purpureus is a yeast (fungus) commercially used in the production of Show Answer


Q424) Study the following pathogens .
I. Yersinia pestis
II. Borrelia sp
III.Odium albicans
IV. Microbacterium leprae
V. Haemophilus gallinarium
Which of the above cause damage to poultry industry? Show Answer


Q425) During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left
undegraded? Show Answer


Q426) Which of the following aquatic weeds is not used in production of biogas? Show Answer


Q427) Silk is obtained from Show Answer


Q428) Caffeine, cocaine and amphetamine are Show Answer


Q429) Which one of the fungi is used for production of citric acid? Show Answer


Q430) Methanogens, particularly Methanobacterium grow anaerobically on cellulosic material and produce
I. methane
II. carbon dioxide
III. oxygen
IV. ethane
Choose the correct option Show Answer


Q431) Consider the following statements about, secondary sewage treatment
I. In secondary treatment useful aerobic microbes grow rapidly and form flocs. Flocs are masses of
bacteria associated with fungal filaments to form mesh-like structures.
II. The growing microbes consume organic matter and thus reduce the biochemical oxygen demand.
When BOD of sewage has reduced, the effluent is passed into settling tank.
III. In settling tank, the bacterial flocs settle and the sediment is called activated sludge.
IV. A small part of the sludge is used as an inoculum in the aeration tank and the remaining part is passed
into large tanks called anaerobic sludge digesters.
V. In the digesters, heterotrophic microbes anaerobically digest bacteria and fungi in sludge producing
mixture of gases such as, carbon dioxide nitrogen and carbon monoxide which form the biogas
Which of the statements given above are correct? Show Answer


Q432) Gobar gas contains mainly Show Answer


Q433) One of the major difficulties in the biological control of insect pest is that the Show Answer


Q434) Study the following flow chart that shows curd formation from milk and select the correct option for A and
B
Milk is incubated with curd

LAB shows growth in milk

Production of …..A…..

Coagulation and digestion of milk protein

Improved nutritional quality by increased ….B…. Show Answer


Q435) Pencils are prepared from the wood of Show Answer


Q436) Rauwolffia serpentina is used in Show Answer


Q437) Agriculture by using only biofertilisers is called Show Answer


Q438) Penicillin is the first antibiotic. It was discovered by Show Answer


Q439) In paddy fields biological nitrogen fixation is chiefly brought by Show Answer


Q440) Superiority of hybrid over parents is Show Answer


Q441) Which of the following bacteria is present in the rumen of cattle? Show Answer


Q442) Wonder wheat is new wheat variety developed by Show Answer


Q443) Which of the following in an opioid drug? Show Answer


Q444) Select the correct statement from the following Show Answer


Q445) Jute fibres are obtained from the Show Answer


Q446) Consider the following statements
I. Antibiotics are chemical substances produced by some microorganisms which can kill or retard the
growth of other disease-causing microorganisms
II. Penicillin is the first antibiotic discovered by Alexander Fleming (1928), while working o bacterium Staphylococcus aureus
III. The function of penicillin as an antibiotic was established by Ernst chain and Howard Florey
Which of the statement given above are correct? Show Answer


Q447) Swiss cheese is formed by the bacterium Show Answer


Q448) Azolla is used as a biofertilizer because it Show Answer


Q449) Methanogens do not produce Show Answer


Q450) Statement 1: Use of fertilizers greatly enhances crop productivity.
Statement 2: Irrigation is very important in increasing crop productivity Show Answer


Q451) compare the statements A with B.
Statement 1: Ranikhet disease is the disease of poultry.
Statement 2: It is caused by a virus Show Answer


Q452) Statement 1: Clonal selection is a method of breeding in sugarcane
Statement 2: Sugarcane is propagated through suckers Show Answer


Q453) Statement 1: Leguminous plants are best preferred in rotation of crops
Statement 2: They have root nodules, which have nitrogen fixing bacteria Clostridium Show Answer


Q454) Statement 1: Organochlorine pesticides are organic compounds that have been chlorinated.
Statement 2: Fenitrothion is one of the organochlorine pesticides Show Answer


Q455) Statement 1: Citrullus vulgaris is produced from a cross between 4n male and 2n female plants.
Statement 2: These triploid sterile plants do not bear seeds Show Answer


Q456) Statement 1: Chemical pesticides are more hazardous as compared to biopesticides
Statement 2: Chemical pesticides are mostly non-specific, expensive, hazardous and pollute the
atmosphere Show Answer


Q457) Statement 1: Biogas is used as fuel for cooking and lighting
Statement 2: It is considered as ecofriendly and pollution free source of energy Show Answer


Q458) Statement 1: The disadvantages of synthetic pesticides can be overcome by the use of natural or
biopesticides
Statement 2: Biopesticides are harmless pesticide which are used to control weeds and pest without
causing any damage Show Answer


Q459) Statement 1: Fish meal is a rich source of protein for cattle and poultry.
Statement 2: Fish meal is produced from non-edible parts of fishes like fins, tail. Show Answer


Q460) Statement 1: Besides curdling of milk, LAB also improve its nutritional quality by increasing vitamin-
B12
Statement 2: LAB, when present in human stomach, check disease causing microbes Show Answer