Practice Test


1) Colchicine brings about:


2) Triticale has been developed through intergeneric hybridisation between:


3) In crop improvement programme haploids are important because they:


4) Best method to increase crop yield is (e. g. wheat)


5) Hereditary variations can be got with the help of:


6) Crop improvement is possible through:


7) A breeder evolving disease resistant variety will start with:


8) Emasculation of flowers is carried out through removal of:


9) Regulations governing movement of diseased plant material are called:


10) A tool in crop improvement involving identification of genes, transfer and integration is:


11) Crosses involving plants of the same variety are:


12) An old breeding technique is:


13) Aim of plant breeding is to:


14) Pure line breeds refer to:


15) Quarantine regulation is meant for:


16) Androgenic haploids were produced from anther culture for the first time by:


17) Emasculation is removal of:


18) Selection is method of:


19) Central Sugarcane Breeding Research Institute is situated at:


20) Continued self pollination results in:


21) Genetic diversity of agricultural crops is threatened by:


22) Haploid plants are preferred over diploid plants for study of mutation because in haploids:


23) Crop plants grown in monoculture are:


24) Callus can form shoot or root by changing ratio of:


25) Embryo culture is employed in:


26) In tissue culture, single germinating pollen grain will form a plant.


27) Somaclonal variations are obtained through:


28) For producing protoplasts from plant cells, which of the following are required?


29) Improved varieties of wheat suitable for Indian climates have been developed by:


30) Triticum aestivum is:


31) Which of the following yield an aromatic essential oil used as antiseptic, as fly repellent and modifier in hair lotion?


32) Teak is obtained from plant:


33) A milk-like preparation can be made from the seeds of:


34) Vegetables are chief source of:


35) The cheapest high energy crop of India is:


36) Quinine is obtained from bark of:


37) Sugars extracted from sugarcane and sugar beet differ in:


38) The drug which reduces blood pressure is obtained from:


39) Increase in food production is necessary because of:


40) The green revolution in India was possible due to:


41) New varieties of plants can be produced by:


42) Which of the following is insect pest resistance?


43) Which of the following is resistance to leaf and stripe rust:


44) Indian Agriculture Research Institute is situated at:


45) The botanical name of sweet flag, commonly used as antispasmodic, expectorant and remedies for asthma and chronic diarrhoea is:


46) Pennisetum and Sorghum are of African origin, while rice originated in:


47) Two temperate cereals, sometimes cultivated at high altitude in the tropics, are:


48) Rice, maize, sorghum and millets are the principal cereals of the:


49) The part of the grain in cereals, where much of the protein lies is the:


50) The hexaploid wheat species from which modern types of wheat have been developed:


51) Pulses belong to the family:


52) The largest wheat producing country is:


53) The scientific name of maize is:


54) The International Rice-8 (IR-8) has been introduced in India from:


55) Taichung native-the dwarf rice variety in India is a native of:


56) Pathogen free plants are obtained from:


57) High yielding variety of rice is:


58) The botanical name of popcorn is:


59) Maize has less protein content than:


60) Maize grain is rich in:


61) Maize grain is deficient in:


62) The term Plantain refers to:


63) The fruits of the plants which yield oil and fibres:


64) Gum arabic is obtained from wild and semicultivated trees, in Sudan of:


65) Which of the following is not a true pulse crop?


66) The species which yield commercial cotton belongs to the genus:


67) Anatomically, cotton fibres are:


68) Which of the following is not a root vegetable?


69) The cotton fibre from the cotton plant is obtained from:


70) The commercial jute fibres are:


71) Paddy is suitable for cultivation in:


72) Fibre yielding plant is:


73) Which one of the following is not an important Indian millet?


74) The scientific name of Jowar is:


75) The scientific name of Bajra is:


76) The composition of cotton fibre is:


77) The fibre crop occupying the largest area in India is as under:


78) Fibres are made of:


79) Which is the most important source of food and fodder?


80) Gram belongs to family:


81) Quite often pulse-crops are not manured with nitrogenous fertilisers. It is so because:


82) Sugar is extracted besides sugarcane from:


83) Indian rubber tree belongs to:


84) The botanical name for groundnut is:


85) Safflower oil is obtained from the seeds of:


86) Potato and tomato are native of:


87) The plant from which chewing gum is made:


88) Which of the following is not an oil seed?


89) The largest groundnut producing country is:


90) The oil used for the treatment of toothache is:


91) The principal source of sugar is/are:


92) Sugar obtained from sugarcane is:


93) The dry fibrous residue left after the extraction of sugarcane juice is known as:


94) Cassava is a:


95) The leaf juice of which one of the following plants is used for removal of opacity of cornea of the eye?


96) Castor oil is obtained from:


97) Which of the following plants is an oil as well as fibre yielding crop?


98) Essential oils are made of:


99) Macaroni is obtained from:


100) The major souce of sugar in India is:


101) Which of the following groups of plant genera produces fibres of economic importance?


102) The plant whose seeds yield safflower oil and the petals an orange dye is:


103) The drug "Belladona" is obtained from:


104) International rice research institute is at:


105) The chief groundnut producing state of India is:


106) Commercial latex is obtained from:


107) Largest producer of sugarcane is:


108) One of the recently introduced new crops of oil seed in the deserts of India is jojoba. Select the correct botanical name of this plant.


109) Leucaena-a fast growing tree, has been selected as a feed yielding tree under the social forestry programme in rural area of our country. What is the common name of this tree?


110) Mark the odd one with regard to the source of following edible oils:


111) Vanilla is obtained from:


112) Which of the following statement is correct with respect to plant species and its uses?


113) Of the world's top five crops in terms of annual production:


114) Which of the following is an Indian medicinal plant?


115) Most of the soft wood comes from:


116) A good source of vitamin B_1 is:


117) An important medicine for bronchitis is obtained from:


118) In which state is the coir industry concentrated:


119) Margarine is prepared from:


120) Which of the following yields the heaviest wood?


121) Botanical name of Sanjeevani or Hasnpari is:


122) Cotton fibres are obtained from:


123) Lint and fuzz and associated with:


124) Cash crops are the crops which are grown:


125) Heavea braziliensis is a source of:


126) Cereals are major sources of:


127) Which one of the following is a source of textile fibre:


128) Timber or wood is:


129) Jute is derived from:


130) The economic importance of Diospyros ebenum is for:


131) Groundnut oil is obtained from the plant:


132) Sweetest sugar among natural carbohydrates is:


133) Axillary buds are used to raise crop of:


134) From which part of Cinchona a drug is obtained:


135) Jute is obtained from a plant which belongs to the family:


136) Which one of the following plants yields Sun-hemp?


137) The drug plant Aconitum napellus belongs to the family:


138) Which one of the following countries is the centre of origin of rice?


139) Long fibres of cotton seed are known as:


140) Triticale is obtained by crossing wheat with:


141) Before the European invader which vegetable was absent in India?


142) Which of the following is the pair of biofertilizers?


143) Which statement is correct about centre of origin of plant?


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


145) "Jaya" and "Ratna" developed for green revolution in India are the varieties of:


146) Himgiri' developed by hybridisation and selection for disease resistance against rust pathogens is a variety of:


147) Semidwarf varieties of Rice were derived from which plant developed at IARI:


148) Selection of good breeds of animals is based on:


149) When breeding is between animals of the same breed, it is called:


150) Hisardale is a new breed of sheep developed in Punjab by crossing:


151) Maximum number of existing transgenic animals is of:


152) Percentage of fibroin and sericin in silk is:


153) Labeo and Catla are:


154) During the period of 1960 to 2000, wheat production increased from:


155) Poultry Farm Management includes the domestication of:


156) Continued inbreeding usually reduces fertility and low productivity. It is termed:


157) MOET is a programme for herd improvement. Which injection is injected into body, for super-ovulation?


158) Swarm is:


159) Which of the following hybrids have been successfully developed in India having high yield and resistant to water stress?


160) Bagasse is a term related with:


161) Polished rice grains are less nutritious than the unpolished grains because:


162) The roots of which of the following are used for blending coffee:


163) Emasculation is needed in:


164) Wood is composed of:


165) Which of the following methods is/are used in recovery of healthy plants from diseased plants?


166) In shoot and root culture, excess of auxin in the medium will promote


167) The colour of high yielding Mexican wheats were not liked by the Indians. It was originally red grained. Their cultivation was adopted in India on large scale only when exposure to gamma radiations converted them to amber grained. Which of the following methods of plant-breeding has been put into practice in the given case?


168) Green revolution in India was possible due to


169) Which of the following is the conventional method of plant breeding for disease resistance?


170) Which of the following is/are the advantage(s) of micropropagation?


171) Improved varieties of wheat suitable for Indian climate have been developed by


172) Improved rice variety IR-8 has been introduced in India from


173) Tissue culture technique can produce indefinite number of new plants from a small parental tissue. The economic importance of the technique is in raising


174) Amino acids present in improved varieties of maize are


175) The most common sources of single cell protein are


176) Which of the following shows the correct sequence of steps involved in breeding a new genetic variety of a crop?
I. Selection and testing of superior recombinants.
II. Germplasm collection.
III. Cross hybridization among the selected parents.
IV. Evaluation and selection.
V. Testing, release and commercialization of new cultivars.


177) The semi dwarf wheat which was instrumental in increasing wheat production was developed by


178) The plant part which is used to culture is called


179) Triticale is the first man made cereal crop. The combination of parents involve its production is Triticum and


180) Which one of the following characters was most important for selection of present day maize plants?


181) One of the following species of wheat was most primitive and wild


182) What is the common name of Triticum monococcum?


183) Which one of the following is the common hexaploid bread wheat?


184) Which one of the following is called macaroni wheat which is mainly used for preparing pasta and noodles?


185) What was the colour of high yielding Mexican wheat?


186) Which one of the following pairs is correctly matched?


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


188) The indica variety of rice is crossed with japonica variety of rice because the later are


189) In high yielding hybrid crop varieties, to exploit hybrid vigour, the farmers need to purchase fresh hybrid seed every year because


190) Pomato


191) Aims of plant breeding are to produce


192) In which crops is the method of mass selection applied


193) Both the environment and the genotype are important in the development of


194) The self pollinated progeny of a homozygous plant constitute a


195) The reason why vegetatively reproducing crop plants are best suited for maintaining Hybrid vigour is that


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


197) Hybrid vigour is mostly due to


198) A crop-produce should provide the optimum nutrition and must not contain an


199) The emasculation of flower buds is achieved by the removal of


200) Sterilization means


201) The substance used for solidification of nutrient medium is


202) An unorganised mass of cells is called


203) The ability of plant cell to give rise to an entire new plant is called


204) Culturing of isolated plant organs is called


205) Mature embryos are mostly


206) A novel technique devised to produce vast quantities of strong and healthy plantlets by rapid vegetative multiplication under controlled conditions


207) Select the correct statement(s) -
I. IARI has released a mustard variety rich in vitamin C.
II. Pusa Sawani variety of Okra is resistant to aphids.
III. Hairiness of leaves provides resistance to insect pests.
IV. Agriculture accounts for approximately 33% of India's GDP and employs nearly 62% of the population.


208) In hybridization, the haploids combine the advantages of


209) Which one of the following is not a secondary metabolite?


210) Who gave the idea that every plant cell is totipotent


211) Name the Japanese cytologist who cultured anthers for the first time


212) In order to obtain disease-free plants through tissue culture techniques, the best method is


213) The best way to obtain Bacteria and viruses free plants through tissue culture


214) The substance used in the tissue culture medium for induction of shoots in callus is


215) In tissue culture medium, the embryoids formed from pollen grains is due to


216) Haploid plantlets can be produced by


217) The technique of obtaining large number of plantlets by tissue culture method is called


218) The new varieties of plants are produced by


219) 'Norin gene' of dwarfness in wheat originated through spontaneous mutation in


220) Dharwar American Variety of cotton is the product of


221) Selection of homozygous plant is


222) Triticum aestivum, the common bread wheat is


223) Which of the following hybrid varieties of crop plants has been develop in India


224) Most cultivated plants are


225) India's wheat yield revolution in the 1960s was possible primarily due to


226) A self fertilizing trihybrid plant forms


227) Somaclonal variation can be obtained by


228) In maize, hybrid vigour is exploited by


229) In the hexaploid wheat, the haploid (n) and basic (x) number of chromosomes are


230) Embryo rescue is used for


231) Scientists are trying to get hybridization between tomato and potato. The most accurate name would be


232) Which of the following is not HYV of paddy?


233) Which part of the plant is best suited for making virus free plants?


234) Apiculture is associated with the maintenance of


235) Inbreeding increases


236) Which of the following is the consequence of plant diseases?


237) Fill up the blanks - Saccharum barberi was originally grown in north India, but had ___A___ sugar content and yield. Tropical canes grown in south India Saccharum officinarum has ____B___ stems and ____C___ sugar content but did not grow well in north India. These two species were successfully crossed to get sugar cane varieties combining the desirable qualities of high yield, ___D___ stems, ___E___ sugar and ability to grow in the sugar cane areas of ___F___ India.


238) Select the correct statements


239) Select the correct statements


240) The flowers of which plant are not pollinated by bee?


241) Bees are important for


242) IPGRI is abbreviation of


243) Shoot develops in tissue culture when there is


244) Norman Borlaug is associated with


245) Borlaug developed new varieties of


246) Haploids of Datura were obtained through


247) Fill in the blanks - Semi-dwarf rice varieties were derived from ____A____, (developed at International Rice Research Institute (IRRI), Philippines) and Taichung Native-1 (from ____B____). The derivatives were introduced in ____C____. Later better-yielding semidwarf varieties Jaya and Ratna were developed in ____D___.


248) An improved variety is


249) An important germplasm storing center in India is


250) Pure line variety of wheat is


251) Evaluation of new variety in India is done by


252) Gene responsible for dwarfing in wheat is


253) Scented basmati rice is the contribution of


254) Which of the following is an example of inter-generic hybridization?


255) The dwarf wheat varieties brought from Mexico into India were


256) Antinutritional factor, neurotoxic cyanoalanine is found in


257) Cereals and millets are mainly deficient in which amino acids?


258) Which of the following is incorrect w.r.t. SCP?


259) The objectives of breeding improved nutritional quality of crops are to increase


260) Select the correct statement(s)


261) Which statement(s) is correct?


262) Which of the following has been developed by India?


263) The conventional method of breeding for resistance includes which of the following steps?


264) Which one is correct about Atlas 66?


265) High yielding, semi dwarf varieties of rice are


266) Select the false statement(s)


267) Which is/are false?


268) Which of the following matching is correct?


269) Cryopreservation is -
A. preservation at ultra low temperature
B. preservation in liquid nitrogen
C. preservation through exposure to gamma rays
D. preservation of semen


270) Which one is a source of single cell protein?
A. Nostoc
B. Spirulina
C. Chlorella
D. Scenedesmus


271) Which of the following is a source of single cell protein?
A. Saccharomyces
B. Torulopsis
C. Candida
D. Fusarium


272) Which one is a chemical mutagen?
A. Ethylmethane sulphonate
B. Sodium azide
C. Gamma rays
D. 2, 4-D


273) Which of the following is a variety of rice?
A. Bala
B. Kalyan sona
C. Jaya
D. Sonars 64


274) Which one is a rich source of vitamin A?
A. Carrot
B. Spinach
C. Lemon
D. Beans


275) Which factors are responsible for development of disease in a plant?
A. Susceptible host
B. Aggressive pathogen
C. Conducive environment
D. Excess of fertilizer


276) Given below are five statements (A to E) each with one or two blanks. Select the option which correctly fills up the blanks in the statements.
Statements :
A. When a hybrid is produced by _____ of somatic cells of two varieties or species, it is known as _____.
B. _____ is the
tissue culture technique used for rapid vegetative multiplication of ornamental plants and fruit trees by using small sized emplants.
C. _____ is the sum total of all the alleles of the genes present in a crop and its related species.
D. A _____ is a hybrid of male donkey and a female horse.
E. The hybrid between the female donkey and male horse is called ____.


277) Given below are the statements (A to E) each with one blank. Select the option which correctly fills up the blanks in the statements.
Statements :
A. For the process of hybridization, selfing of parents is done, to reduce the _____.
B. Performance of a crop or an animal depends mainly on its genotype and the _____ in which it is grown.
C. An ____ is excised from its original location and used for initiating a culture.
D. The scientific name of Indian cattle is ____.
E. MOET (multiple ovulation embryo transfer) is a method of _____.


278) Identify the false statements -
I. One of the objectives of plant breeding is to develop disease, insect and pest resistant varieties.
II. Plant breeding is both art and science.
III. Catla and Rohu are the most eaten marine fishes in our country.
IV. South Indian sugarcane variety Saccharum officinarum has thiner stem and lower sugar content than the North Indian one.


279) Green revolution in India occurred during


280) In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called


281) Genetically improved crop varieties can be developed in laboratory by


282) An alga which can be employed as food for human being is


283) To obtain virus - free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken


284) 'Give me a living cell of any plant and I will give you a thousand plants of the same type'. This statement refers to


285) During hardening, plantlets are kept under


286) To induce formation of organs in a callus it is necessary to provide


287) Development of hybrid varieties of plants and better milk yielding varieties of cows is an example of


288) A technique of micropropagation is


289) Among the following how many varieties are improved varieties of wheat.
Jaya, Sonalika, Ratna, Kalyan sona, Sharbati sonora, Atlas-66


290) The conventional method for development of disease resistance are


291) For the crop improvement, plant breeder required different types of resistant gene. The source of these resistant gene may be


292) Which of the following scientist is the initiator of "Lab-to-Land" program?


293) Which one of the following options gives the categorization of six improved varieties of plant according to the type of crops (A, B, C) they give out?


294) The Indian Agriculture Research Institute, New Delhi has released several vegetable crops that are rich in vitamins and minerals.
How many of these vegetables are biofortified which are enriched in vitamin A and vitamin C?
Carrot, Spinach, Bitter gourd, Bathua, Mustard, Tomato, French peas, Lablab, Garden peas.


295) Choose the correct statements among the following -
I. Spirulina as single cell protein can serve as food rich in protein.
II. Pomato, new hybrid plant formed by somatic hybridization is the most successful hybrid for commercial utilization.
III. Iron fortified rice variety has been developed which contain over 5 times as much iron in common varieties.
IV. We can use even sewage to produce large quantities of Spirulina.


296) Nobel laureate Norman E. Borlaug developed his modified crop varieties at


297) Select the correctly matched pair


298) A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called


299) A true breeding plant is


300) Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?


301) Which of the following statements does not provide an explanation for hybrid vigour?


302) Which of the following is an introduced variety/crop?