Practice Test


1) 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?


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


3) Greater the BOD of sewage water, its polluting ability is:


4) Lady bird beetle and dragon flies are useful to get rid of


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


6) Adeno virus, a bacteriophage causes


7) Prions are:


8) Wine and beer are produced:


9) Which of the following acts competitively inhibiting enzyme responsible for synthesis of cholesterol:


10) Sunn hemp fibres are obtained from:


11) Associated symbiosis is shown by:


12) Which of the following is a free living bacterium?


13) Thurioside is a:


14) Rotenone is:


15) Select the correct statement from the following:


16) Confusion technique is used in:


17) Cochineal insects have been employed in checking overgrowth of:


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


19) VAM is characterized by:


20) Pick up the free living cyanobacterium:


21) Mycorrhizal hyphae prove useful to the plant by:


22) Ectomycorrhiza is found:


23) Select the one which is not related to Rhizobium:


24) Farmyard manure is prepared from:


25) Which one of the following is free living nitrogen fixing cyanobacterium?


26) Vesicular Arbuscular Mycorrhizae are:


27) Pick up the natural insecticide prepared by Chinese:


28) Biopesticides are:


29) Major sources of biofertilizers are:


30) Pheromones are secreted:


31) Mycorrhiza is a:


32) Total consumption of fertilizers in India is about:


33) The overgrowth of cacti was checked by the introduction of:


34) An ideal pesticide is one which:


35) Which of the following alkaloids are good plant insecticides?


36) The compound extracted from neem which keeps away the insects is:


37) Which of the following is a good fire wood source in India?


38) Which of the following are biofuels?


39) A petroleum plant is:


40) Pyrolysis of wood produces:


41) Main source of energy for a plant is:


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


43) Non-renewable substance or resource is:


44) Biogas production rate is limited by:


45) The first step in biogas production is:


46) Which of the following is a petroleum plant?


47) Fuel wood is:


48) Daily input of sunlight per square metre per day on the earth is:


49) Which of the following is the non-conventional source of energy?


50) HMP is a bioenergy obtained from:


51) Biogas contains:


52) Raising of crops for the production of ethanol is known as:


53) Which of the following can be used in place of petrol?


54) Which of the following are energy crops?


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


56) In which of the following forms animal energy is available?


57) Which of the following liquid hydrocarbon?


58) Gas produced as a result of anaerobic fermentation of agricultural wastes is:


59) Social forestry is:


60) Calorific value of biogas is:


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


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


63) Which one of the following is non-symbiotic biofertilizer?


64) A biofertilizer is:


65) Which organism serves as a biofertilizer


66) Azotobacter and Bacillus polymyxa are:


67) The phenomenon of using a predator for controlling a pest is:


68) Crop rotation is carried out for:


69) Nitrogen fixation is:


70) Leghaemoglobin occurs in:


71) BGA is chiefly used as fertilizer in:


72) Which element plays an important role in nitrogen fixation?


73) Mycorrhiza represents:


74) The biological control of agricultural pests, unlike, chemical control is:


75) The neem is used as a natrual insecticide because:


76) Which of the following helps in absorption of phosphorus from soil by plants?


77) Secondary sewage treatment is mainly a:


78) Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?


79) An organism used as a biofertilizer for raising soyabean crop is:


80) The most common substrate used in distilleries for the production of ethanol is:


81) Ethanol is commercially produced through a particular species of:


82) A prokaryotic autotrophic nitrogen fixing symbiont is found in:


83) Which one of the following is not a biofertilizer?


84) Continuous addition of sugars in 'fed batch' fermentation is done to:


85) Which one of the following is a correct statement about biogas?


86) For biogas production beside during, which of the following is used?


87) Besides dung the weed which can be used in biogas production is:


88) Both power and manure are provided by:


89) The country pioneer in production of fuel alcohol is:


90) Citric acid is produced by:


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


92) Product obtained from the plants of which family can be alternative of liquid fluid?


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


94) The nodulated roots are found in:


95) Composited manure consists of:


96) Which of the following plants is commonly used as green manure in India?


97) Which of the following is required for better nitrogen fixation of Rhizobium?


98) Azolla enriches rice field with nitrogen due to its association with:


99) Rotation with smother crops is useful for:


100) Transgenic crops are useful as they have genes of:


101) The total consumption of fertilizers in India is about:


102) The requirement of fertilizers by the end of century would be:


103) Sporeine was developed in:


104) Biopesticides include:


105) Devine' and 'Collego' are two agricultural substances that are used as:


106) Antifeedant property is found in:


107) A biodegradable insecticide has been obtained from:


108) Phosphobacteria contains:


109) Biological control means:


110) Sesbania rostrata is preferred as green manure over other species because:


111) Ectomycorrhiza absorbs and stores N, P, K and Ca in:


112) Biocontrol of larvae of mosquito is done by:


113) A straight fertilizer is the one which is:


114) A bad fire-wood is that of:


115) Number of persons dependent upon wood as fuel is:


116) City refuge mainly consists of:


117) Who is credited with identifying petrocrops?


118) Pyroligneous acid produced during pyrolysis of wood is:


119) Methane content of biogas is:


120) Aquatic plant used in biogas generation is:


121) In Brazil, 90% of cars are running on:


122) The energy potential of DAP is equal to:


123) Energy plantations differ from energy cropping in being:


124) Thar desert is expanding at the rate of:


125) Producer gas is used for:


126) Wood gas is used as:


127) Leucaena, a new plant for social forestry, is recommended for:


128) 50 kg of fresh cow dung yields biogas:


129) Various resources of bioenergy are:


130) The first step during biomass production is:


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


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


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


134) Microbes are used in -
A. primary treatment of sewage
B. secondary treatment of sewage
C. anaerobic sludge digester
D. production of bioactive molecules


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


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


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


138) Which of the following is used as biofertilizer?
A. Cyanobacteria
B. Yeast
C. Symbiotic bacteria
D. Free living bacteria


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


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


141) Methanogens are found in -
A. ethanol
B. organic acids
C. anaerobic sludge
D. rumen of cattle


142) 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)


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


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


145) Which industrial products are synthesized from microbes?
A. Antibiotics
B. Fermented beverages
C. Enzymes and chemicals
D. Bioactive molecules


146) Microbes are found


147) The microscopic proteinaceous infectious agents are called


148) The nutritive media for growing bacteria and other microorganisms in the laboratory is called


149) Which of the following bacteria convert milk into curd?


150) Which role is played by lactic acid bacteria (LAB) in our stomach?


151) The dough used for making bread is fermented by


152) Which of the following is used in preparing cheese?


153) The large vessels for growing microbes on an industrial scale are called


154) Which of the following organisms is used in the production of beverages?


155) The gas responsible for puffing-up appearance of dough comes from


156) The chemical substances produced by some microbes which can kill or retard the growth of other microbes are called


157) Which of the following antibiotics discovered first?


158) Acetic acid is produced by a


159) Citric acid is produced by


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


161) Statins used for lowering blood-cholesterol level are extracted from


162) The bioactive molecule cyclosporin. A is used in


163) Cyclosporin A is produced from


164) The primary treatment of sewage involves


165) The amount of oxygen required by the microbes in the decomposition of organic matter is called


166) The mixture of gases released during anaerobic digestion of sludge is called


167) Biogas contains


168) The symbiotic association between fungi and roots of higher plants is called


169) The organisms which are used to enrich the nutrient quality of the soil are called


170) The bacteria was discovered by


171) The bacterium that commonly lives in animal and human intestines is


172) Streptomycin is produced from


173) The main difference between Gram-positive and Gram-negative bacteria lies in


174) Which one of the following sets includes bacterial diseases?


175) Streptomyces rimosus is the source of the antibiotic


176) During which stage of sewage treatment microbes are used?


177) Which of the following serve as biofertilizer in paddy fields?


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


179) The solids which settle after primary treatment of sewage are called


180) 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 ________.


181) 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 ________.


182) 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 ________.


183) 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.


184) 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.


185) 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.


186) 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


187) In cheese manufacture, the micro-organisms are used for


188) Which one(s) is/are correct about Cyclosporin A?


189) Antibiotics are used to treat diseases like


190) Choose the correct sequence of microbes involved in biogas production


191) Baculoviruses (Nucleopolyhedrovirus) does not show


192) Enzyme which has the fibrinolytic effect is


193) Swiss cheese is associated with which of the following?


194) Which of the following is common to Azospirillum, Azotobacter, Anabaena, Nostoc and Oscilatoria


195) The advantage, the fungi derive from mycorrhizal association with plants


196) 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.


197) Types of alcoholic beverages obtained depend on


198) Which of the following is correct?
I. Wine and beer are produced without distillation of fermented broth.
II. Wine and beer are produced with distillation of fermented broth.
III. Whisky brandy and run are produced by distillation of fermented broth.
IV. Whisky brandy and run are produced without distillation of fermented broth.


199) Which of the following is false?


200) Mycorrhiza is found in


201) Which of the following enzymes is not used in making detergent?


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


203) Select the correct statement


204) Organic farming includes


205) 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?


206) In paddy field which of the following severs as an important biofertilizer


207) Which of the following is false about the Mycorrhiza?


208) 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


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


210) In gobar gas, the maximum amount is that of


211) 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.


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


213) Monascus purpureus is a yeast used commercially in the production of


214) A patient brought to a hospital with myocardial infarction is normally immediately given


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


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


217) Yeast is used in the production of


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


219) During sewage treatment, biogases are produced which include


220) Which one of the following statement is not true.


221) What gases are produced in anaerobic sludge digesters


222) Identify the set which has all organisms used in biological control of pests


223) During waste water treatment, trickling filter is used for


224) Biogas can be good substitute for


225) Which of the following is wrongly matched in the given table?


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


227) Which one of the following micro-organisms is used as biofertilizer?


228) Jojoba contains


229) Castor oil is yielding from which of the following?


230) A hybrid where the cytoplasm of two parent cells are fused by retaining only one parental nucleus is called


231) Which one of the following is being utilized as a source of biodiesel in the Indian countryside?


232) Powdery mildew of wheat is caused by species of


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


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


235) Which one of the following is biofuel?


236) Quinine used for treatment of malarial fever is extracted from


237) Clove oil is obtained from


238) Which role is played by Lactobacillus in our stomach?


239) Which one of the following is a systematic insecticide?


240) Choose the minor carp from the following


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


242) The pesticide most persistent in the soil is


243) Besides dung, the weed that can be used in biogas production is


244) Which one of the following is a petroleum plant?


245) An organism used as biofertiliser for raising any legume crop is


246) Rice bran oil is used as an


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


248) The plant, which is used for studying hybrid vigour or heterosis is


249) Sewage contains large amounts of …A… and …B… . Here A and B refers to


250) Which of the following is a wrong matching of a microbe and its industrial product?


251) Removal of anthers of some flowers during plant breeding is


252) The plant of Triticum aestivum is


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


254) Cocaine alkaloid is obtained from


255) First man-made cereal (i.e., triticale) is


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


257) Which of the following plant yields oil and fibre both?


258) Trichoderma species, free living fungi, are present in root ecosystems are potentially useful as


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


260) Mule is a product of


261) The pioneer country in the production of fuel-alcohol is


262) The disease in poultry, which reduces immunity and spreads through contaminated food is


263) Potato is a native of


264) Which stage of silkworm secretes silk?


265) Morphine, which is used as an analgesic is obtained from


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


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


268) LSD is obtained from


269) 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


270) Roquefort cheese is formed by ripening with the fungi for a particular


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


272) Which one of the following is correct?


273) In honey, the percentage of maltose and other sugar is


274) Yeast is used in the production of


275) Most of the petrocrops belong to family


276) Which of the following has been covered under the broad patent category?


277) 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?


278) Which of the following is exhaustible but limited source of energy?


279) Gossypium hirsutum is


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


281) The function of penicillin as an antibiotic was established by


282) Big holes in Swiss cheese are made by


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


284) The medicinal plants is


285) Which is produced during anaerobic fermentation of agricultural wastes?


286) Insecticide obtained from neem plant is


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


288) Isinglass, a type of byproduct of fish industry is principally used for


289) Which of the following serve as biofertiliser in paddy fields?


290) Which one of these microbes is used in the commercial production of butyric acid?


291) Primary treatment is the


292) 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


293) Biogas is a mixture of inflammable gases like


294) Biogas production from waste biomass with the help of methanogenic bacteria is


295) In silk fibre, the central core is made up of


296) The part of flower of Crocus that yields saffron is


297) Which is the major crop in Asia?


298) Which method of plant breeding resulted in the production of ‘Hessian fly resistant’ wheat variety?


299) The raw material obtained, from which one of the following plants, and is used in paper making?


300) Which of the following fibres is not a plant product?


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


302) 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


303) 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.


304) 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?


305) Indian rose wood tree is a common name of


306) Microorganisms or microbes are found in


307) Emasculation is concerned with


308) From which part of coconut coir is obtained?


309) Microorganism such as Lactobacillus and others are commonly called


310) Which of the following crops have been brought to India from New world?


311) Which one of the following types of silk is being produced extensively in South East Asia?


312) Aleurone grains are rich in


313) Most recent insecticides in India are


314) Breeding of crops with high levels of minerals, vitamins and proteins is called


315) The microorganism used in production of biogas is


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


317) The most common fungal partner of mycorrhiza belongs to genus


318) 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


319) Bacillus thuringiensis (Bt) strains have been used for designing novel


320) Brewer’s yeast is


321) The free-living fungus Trichoderma can be used for


322) Father of green revolution in India is


323) Which of the following can be controlled by using biopesticides?


324) 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


325) Desired improved varieties of economically useful crops are raised by


326) Neem tree has acquired industrial importance as a source of


327) Which one of the following is not a nitrogen-fixing organism?


328) Which of the following shows maximum genetic diversity in India?


329) Cloves are obtained from


330) Which of the following herbicides and defoliant were used by the US military in its herbicidal warfare
programme during the Vietnam war?


331) In crop improvement programme, haploids are of great importance because they


332) Pollution from animal excreta and organic waste from kitchen can be most profitably minimised by


333) Cellulose fibre is obtained from Gossypium


334) Biogas production is carried out by


335) Methanogens, growing anaerobically on cellulosic material, produce


336) Which one is a neem product used as insect repellent?


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


338) Which one of the following is being tried in India as a bio-fuel substitute for fossil fuels?


339) Mycorrhiza does not help the host plant in


340) Which of the following is a disease resistant, high yielding breed of poultry developed in Karnataka?


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


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


343) Percentage composition of fibroin and sericin in silk is


344) Simondesia chinensis is commonly known as


345) The quickest method of plant breeding is


346) Chicken pox, small pox, etc., can be cure by


347) Nitrifying bacteria


348) 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?


349) Cultivation of Bt cotton has been much in the news. The prefix Bt means


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


351) From which one of the following plants, the insecticide pyrethrum is prepared?


352) Bacterial fertilizer is


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


354) Recently Govt. of India has allowed mixing of alcohol in petrol. What is the amount of alcohol permitted for
mixing in petrol?


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


356) 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


357) Which is a useful product of epidermal origin?


358) Toddy is traditional drink of


359) Process of biogas production is an


360) Cork is obtained from


361) Nosema bombycis, which causes pebrine in silk worms is a


362) In September 2001, which of the following was used as a bioweapon agent in America?


363) Gambusia fish is


364) Biogas produced by fermentation of manure, sewage, cattle dung, etc., predominantly comprises


365) Chicory powder, which is mixed with coffee powder is obtained from


366) ‘Kattha’ is obtained from the heart wood of


367) Trichoderma sp. free living fungi has proved a useful microorganism of


368) Biogas is pathogen free because


369) What name has been assigned to the genus produced by a cross between cabbage and radish?


370) Isinglass is a product obtained from air bladder of


371) The water soluble protein associated with silk thread is


372) Most nutritious among the following is


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


374) Real product of apiculture is


375) Integrated Pest Management (IPM) discourages the excessive use of


376) A pseudocereal is


377) An organism used as a biofertilizer for raising soyabean crop production is


378) In maize, hybrid vigour is exploited by


379) Roquefort cheese is formed by ripening with the fungi


380) A straight fertilizer is the one, which is


381) Which of the following microbe convert milk into curd?


382) 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?


383) Saccharomyces cerevisiae is used for commercial production of


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


385) Genetic diversity in agricultural crops is threatened by


386) Which one of the following is used as biological insecticide?


387) During the primary treatment of sewage, solid particles that settle down are called


388) Recently discovered anti-cancer drug is obtained from


389) Triticum aestivum, the common bread wheat is


390) In plant A, 2n = 12 and in plant B, 2n = 16. Then the ploidy number of cross breeding plant is


391) BOD of waste water is estimated by measuring the amount of


392) Producer gas differs from biogas in having


393) Bacillus thuringiensis is used as


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


395) The residue left after methane production from cattle dung is


396) Morphine obtained from opium is


397) Bacillus thuringiensis is used to control


398) 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


399) The timber yielding plant Shorea robusta belongs to the which family?


400) Opium is obtained from which the part of Papaver somniferum?


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


402) By anaerobic process, the cow dung is used to produce


403) India’s wheat yield revolution in the 1960s was possible primarily due to


404) Introduced plants in new localities must show adaptations called


405) The world’s highly prized wool yielding ‘Pashmina’ breed is


406) Which one of the following pesticides is banned now-a-days?


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


408) Which of the following is wrongly matched?


409) Rauwolffia is obtained from which part of the plant?


410) Which one of the following is the American poultry breed?


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


412) 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


413) Quarantine regulation is meant for


414) Which one of the following is not used in organic farming?


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


416) Protoplasts of two different species are used in


417) An important drug is obtained from the bark of


418) Morphine is obtained from


419) Which type of honey bees are useful for apiary industries in India?


420) The term heterosis was first coined by


421) 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


422) 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?


423) The main sources of biofertilisers are


424) Cotyledons and testa are edible parts of


425) Cotton fibre is basically a type of


426) Name the group of microbes used in biogas production


427) Root cells of wheat has 2n = 42 chromosomes. Which one of the following is the basic chromosome
number of wheat?


428) An undistillled alcoholic beverage produced from grain-mesh fermentation is


429) Cytosporin-A an immunosuppressive drug is produced by the fungus


430) Choose the cat fish from the following


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


432) Shakti, Rattan and Protina are three important lysine rich varieties of


433) Gobar gas generation technology was developed by the collaboration of …A… and …B… . Here A and B
refers to


434) Select the correct statement from the once given below


435) Pyrethrin is extracted from


436) Cod and shark liver oil is a source of


437) Agricultural chemicals include


438) Leaves of which plant can sharpen the memory?


439) Which of the following plants is used as biofertilizer?


440) The scientific name of zebu is


441) Reserpine is obtained from


442) The microscopic proteinaceous infectious agents are


443) Biochemical Oxygen Demand (BOD) in a river water


444) Autopolyploids (numeric or quantitative polyploids or intraspecific polyploids) like ferns, garden plants,
gram, maize, rice, banana, grapes, apple, etc, show


445) For cryopreservation, plant materials are frozen at


446) Activated sludge have the ability to settle quickly so that it can


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


448) Leucaena leucocephala is


449) High content of lysine is present in


450) Opium is obtained from


451) The part of castor seed that yields oil is


452) Which one of the following is a viral disease of poultry?


453) Which one of the following is a disease of poultry?


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


455) Atropa belladonna yields medicine used for


456) The terminator gene technology causes


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


458) CFCL is situated at


459) Insecticides usually act upon


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


461) A commonly used mastigator called ‘supari’ is obtained from the plant


462) Which of the following is not used as a biopesticide?


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


464) Which of the following is an endogenic species of earthworm?


465) Which bacteria are utilized in gobar gas plant?


466) Energy cropping is


467) What would happen if oxygen availability to activated sludge flocs is reduced?


468) Asafoetida is obtained from


469) The plant most commonly used as green manure is


470) What happened when we inoculate Rhizobium in the wheat field?


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


472) 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?


473) The symbiotic association of fungi with the roots of higher plants is called


474) Sunhemp is obtained from


475) A common biocontrol agent for the control of plant diseases


476) Three crops that contribute maximum to global food grain production are


477) Pomato is


478) 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


479) The primary treatment of waste water involves the removal of


480) Green manures are prepared from


481) Crossing of unrelated pure breeding animals of different traits within the same breed is called


482) Heroin is obtained from plant of family


483) Disease resistance crop is obtained by


484) Mating between two individuals differing in genotypes to produce genetic variation is called


485) Carbamates pesticides act by combining with acetylcholinesterase enzyme. Which one of the following is a
carbamate?


486) The nutritive medium for growing bacteria and many fungi in the laboratory is called


487) Which of the following statement is correct?


488) Mycorrhiza promotes plant growth by


489) Rotenone is a


490) 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


491) ‘Nagkesar’ is obtained from the flowers of


492) The larvicidial fish used in biocontrol of mosquitoes,is


493) Which one of the following plants found in India is an escape from the quarantine?


494) Green potatoes are toxic due to


495) Baker’s yeast is


496) Which one is not produced by aquaculture?


497) Intoxicant caffeine is found in


498) The purpose of biological treatment of waste water is to


499) International Rice Research Institute (IRRI) is located at


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


501) Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria


502) Plants having similar genotypes produced by plant breeding are called


503) Quinine is obtained from


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


505) In rice fields biological nitrogen fixation is chiefly brought by


506) Which of the following is correctly matched?


507) 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?


508) Turpentine oil is obtained from


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


510) Statins used as blood cholesterol lowering agents are extracted from


511) Triticum vulgare has been found to be presently evolved as


512) A good example for organic fertilizer, which improves phosphorus uptake, is


513) Cricket bat is made from the wood of


514) 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?


515) Hybrid vigour is mostly due to


516) Protein in silk thread is


517) Which of the following is a dual purpose breed?


518) Which is correctly matched?


519) In poultry, first deworming is usually done around this age


520) ‘Heterosis’ is related to


521) Which hexaploid wheat is used to make bread?


522) Somatic hybridization is a technique of


523) Allethrin is a commonly used


524) Which one of these diseases in animals is caused by Babesia bigemina?


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


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


527) A water fern, which is used as a green manure in rice fields is


528) A man made allopolyploid cereal crop is


529) IPM (Integrated pest Management) involves


530) The part of cotton producing pure cellulose is


531) Mosascus purpureus is a yeast (fungus) commercially used in the production of


532) 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?


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


534) The source of intoxicating beverage called ‘Saky’ is


535) Which of the following aquatic weeds is not used in production of biogas?


536) In which method electric current is created for capturing fishes?


537) Which of following plant species you would select for the production of bioethanol?


538) Stramonium is a drug obtained from the plant species of


539) Silk is obtained from


540) Caffeine, cocaine and amphetamine are


541) Which one of the fungi is used for production of citric acid?


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


543) 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?


544) Gobar gas contains mainly


545) One of the major difficulties in the biological control of insect pest is that the


546) 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….


547) Pencils are prepared from the wood of


548) Rauwolffia serpentina is used in


549) Agriculture by using only biofertilisers is called


550) Penicillin is the first antibiotic. It was discovered by


551) In paddy fields biological nitrogen fixation is chiefly brought by


552) Superiority of hybrid over parents is


553) Which of the following insecticides is obtained from the roots of Derris elleptica ?


554) Which of the following bacteria is present in the rumen of cattle?


555) Which is a bioinsecticide?


556) Wonder wheat is new wheat variety developed by


557) Which of the following in an opioid drug?


558) Select the correct statement from the following


559) Jute fibres are obtained from the


560) Para rubber is obtained from the latex of


561) 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?


562) Swiss cheese is formed by the bacterium


563) Azolla is used as a biofertilizer because it


564) Methanogens do not produce


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


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


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


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


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


570) 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


571) 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


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


573) 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


574) 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.


575) 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