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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
The process of RNA interference has been used in the development of plants resistant toA. InsectsB. NematodesC. FungiD. Viruses |
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Answer» Correct Answer - B RNAi i.e., RNA interference is used in the development of plants resistant to nermatode like Meloidegyne incognita. |
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| 302. |
Genetic counsellors can identify heterozygous individuals byA. Height of individualsB. Colour of individualsC. Screening proceduresD. All of these |
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Answer» Correct Answer - C Genetic counselling is the giving of information and advise about the risks of genetic diseases and their outcomes.Genetic screening is a part of genetic counselling which includes prenatal diagnosis, carrier diagnosis and predictive diagnosis. |
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| 303. |
A plant cell without cell wall is calledA. proplastB. protoplastC. nucleoplasmD. explant. |
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Answer» Correct Answer - B The plant cells without cell wall are called protoplasts. |
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| 304. |
Plant piece used in tissue culture is calledA. ExplantB. SomacloneC. InoculantD. Clone |
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Answer» Correct Answer - A Plant piece used in tissue culture is called explant. |
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| 305. |
Meristem Culture |
| Answer» Use of explant that contains pre-existing shoot meristems and produce shoots from them when cultured on a medium. Such a culture is called meristem culture. | |
| 306. |
Meristem culture is the culture ofA. axillary or apical shoot meristemsB. anthersC. plant seedsD. young embryos |
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Answer» Correct Answer - A Meristem is a localised group of cells, which are actively dividing and undifferentiated but ultimately give rise to permanent tissue. Cultivation of axillary or apical shoot meristem is called meristem culture. Meristem culture is carried out in potato, banana, cardamom, orchids (protocorm stage), sugarcane, strawberry, sweet potato, etc. |
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| 307. |
Meristem culture is practised in horticulture to getA. somaclonal variationsB. Haploid plantsC. Virus free plantsD. Slow growing cultures |
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Answer» Correct Answer - C Meristem culture is practiced in horiticulture to get virus free plants |
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| 308. |
In honey, the main consituent isA. calciumB. sugarC. proteinD. water |
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Answer» Correct Answer - B The composition of honey is levulose (sugar) `-38.9%`, dextose (sugar `-21.28%`, maltose and other sugars `-8.81%`, enzymes and pigments `-2.21%`, ash `-1.0%`, water `-17.20%`. |
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| 309. |
Read the following statements and select the incorrect one.A. Semen is preserved for artificial insemination by heating.B. Mating of animals within the same breed, but having no common ancestors on either side of their pedigree upto 4-6 generations is called as out crossing.C. Example of interspecific hybridisation is mule.D. Hinny is a hybrid between the female ass and stallion. |
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Answer» Correct Answer - A Seman is preserved for artificial insemination by freezing. |
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| 310. |
Which of the following plays a role in indigenous system of medicine?A. Plant breedingB. FisheriesC. ApicultureD. MOET |
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Answer» Correct Answer - C Apiculture or beekeeping is the maintenance of hives of honeybees for the production of honet. Honey has high nutritive value and also finds use in the indigenous system of medicine. |
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| 311. |
Artificial breeding of cattle is brought about byA. artificial inseminationB. super ovulation and embryo transplanationC. MOETD. all of these |
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Answer» Correct Answer - D Artificial breeding method of cattle involves following methods: (i) In artificial insemination (Al) method, the semen of superior male is collected and injected into the reproductive tract of the selected female by the breeder. The semen can be used immediately or can be frozen for later use. (ii) In multiple ovulation embryo transfer technology (MOET) method, hormones (with FSH-like activity) are given to the cow for inducing follicular maturation and super ovulation. Instead of one egg, which they usually give per cycle, they produce 6 to 8 eggs. The cow is either mated with a best bull or artificially inseminated. The embryos at 8 to 32 cells stage are recovered and transferred to surrogate mothers. The genetic mother is available for another super ovulation. MOET has been done in cattle sheep, rabbits, buffaloes, mares, etc. |
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| 312. |
Protoplast isA. Another name for protoplasmB. An animal cellC. A plant cell without a cell wallD. A plant cell |
| Answer» Correct Answer - C | |
| 313. |
An explant isA. dead plantB. part of the plantC. part of the plant used in tissue cultureD. part of the plant that expresses a specific gene. |
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Answer» Correct Answer - C Explant is live tissue transferred from the body (plant or nay organism) to a suitable artificial medium to initiate a culture (tissue culture) or to transplant as a graft. |
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| 314. |
Micro-propagation isA. Propagation of microbes in vitroB. Propagation of plants in vitroC. Propagation of cells in vitroD. Growing plants on smaller scale |
| Answer» Correct Answer - B | |
| 315. |
Lysine and tryptophan areA. proteinsB. non-essential amino acidsC. essential amino acidsD. aromatic amino acids |
| Answer» Correct Answer - C | |
| 316. |
The biggest constraint of plant breeding isA. availability of desirable gene in the crop and its wild relativesB. infrastructureC. trained manpowerD. transfer of genes from unrelated sources. |
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Answer» Correct Answer - A Conventional plant breeding results in open pollinated varieties (OP) or hybrid varieties which has a tremendous impact on agriculture productivity over the last decades. Conventional plant breeding also has its limilations. First, breeding can only be done between two plants that are sexually compatible with each other. This limits the new traits that can be added to those that already exist in a particular species. Second, when plants are crossed, many traits that have undersirable effects on potential yield are transferred along with the traits/s of interset. |
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| 317. |
Name the animals that have been used by humans as a source of food |
| Answer» The animal that have been used by humans as a source of food are goat, sheep, cattle and buffaloes (for meat and milk), poultry birds (for egg and meat), bees (for honey), pawn, crab, fishes etc. (for meat). | |
| 318. |
Several South Indian states raise 2-3 crops of rice annually.The agronomic feature that makes this possible is because ofA. Shorter rice plantB. Better irrigation facilitiesC. Early yielding rice varietyD. Disease resistance rice variety |
| Answer» Correct Answer - C | |
| 319. |
Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because ofA. shorter rice plantB. better irrigation facilitiesC. early yielding rice varietyD. disease resistant rice variety. |
| Answer» Correct Answer - C | |
| 320. |
In hybridisation, the haploids combine the advantages ofA. RecombinationB. SegregationC. FixationD. All of them |
| Answer» Correct Answer - D | |
| 321. |
Which one of the following is not secondary metabolite ?A. ResinsB. Essential oilsC. Amino acidsD. Tannins |
| Answer» Correct Answer - C | |
| 322. |
Assertion. Somaclonal variations occur in tissue culture processes. Reason. Variations cannot occur in nature.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion is true but the Reason is false.D. If both Assertion and Reason are false. |
| Answer» Correct Answer - C | |
| 323. |
Among the following edible fishes, which one is a marine fish having rich source of omega -3 fatty acids ?A. MrigalaB. MackerelC. MystusD. Mangur |
| Answer» Correct Answer - B | |
| 324. |
Assertion : MOET technique has been used for cattle, sheep, rabbits , buffaloes, mares ect. Reason : High milk yielding breeds of females and high quality (lean meat with more lipid) meat-yielding bulls have been bred successfully to increase herd size in a short time by MOETA. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - C MOET technique has been used for cattle, sheep, rabbits, buffaloes, mares, etc. as high milk yielding breeds of females and high quality (lean meat with less lipid) meat-yielding bulls have been bred successfully to increase herd size in a short time by MOET. |
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| 325. |
Pure line breed refer toA. Homozygosity and independent assortmentB. Homozygosity onlyC. HeterozygosityD. Heterozygosity and linkage |
| Answer» Correct Answer - B | |
| 326. |
Assertion : Cattle breeds can be improved by super ovulation and embryo transplantation. Reason : Superovolutation in high milk-yielding cows is induced by hormonal injection.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If the assertion is true but reason is falseD. If both assertion and reason are false |
| Answer» Correct Answer - A | |
| 327. |
The plant of Triticum aestivum isA. HaploidB. DiploidC. TetraploidD. Hexaploid |
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Answer» Correct Answer - D The plant of Triticum aestivum is hexaploid. |
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| 328. |
Read the following statements select the correct option. Statement 1 : Ranikhet disease is a disease of poultry. Statement 2: It is caused by a virus.A. Both statements 1 and 2 are correct.B. Statement 1 is correct but statement 2 is incorrect.C. Statement 1 is incorrect but statement 2 is correct.D. Both statements 1 and 2 are incorrect. |
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Answer» Correct Answer - A Ranikhet diease is a respiratory viral disease of popularity characterised by coughing, sneezing and marked signs of respiratory diseases. |
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| 329. |
Desired improved variety of economically useful crops are raised byA. Natural selectionB. HybridizationC. MutationD. Biofertilizer |
| Answer» Correct Answer - B | |
| 330. |
Mutations caused by mutagenic agents are termed asA. Spontaneous mutationsB. Chemical mutationsC. Induced mutationsD. Chromosomal mutations |
| Answer» Correct Answer - C | |
| 331. |
A is an improved breed of cattle and B is an improved breed of chicken. Which of the following options correctly identifies A and B ? A. A -Jersey, B-LeghornB. A-Surti, B-SangamneriC. A-Marwari, B-SirohiD. A-Beetal, B-Jamunapari |
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Answer» Correct Answer - A Jersey is an exotic cattle breed from Island of Jersey in English channel. Leghorn is a Mediterranean breed of chicken. |
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| 332. |
Pure line breed refers toA. Homozygosity and independent assortmentB. Homozygosity onlyC. heterozygosityD. heterozygosity and linkage |
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Answer» Correct Answer - B Pure line breeds refer to homozygosity. |
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| 333. |
The Triticum aestivum wheat isA. Haploid (7 chromosome)B. Diploid (14 chromosome)C. Tetraploid (30 chromosomes)D. Hexaploid (42 chromosomes) |
| Answer» Correct Answer - D | |
| 334. |
The term ' breed' refers toA. a group of animals not related by descent but similar in most charactersB. a group of animals related by descent and similar in most charactersC. a group of animals related by descent but have alomost different characteristicsD. a group of animals neither related bu descent nor have similar characteristics. |
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Answer» Correct Answer - B Breed is a group of animals related by descent and similar in most characters like general appearance, fearues, size, configuration, etc. |
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| 335. |
Hisardale is a new breed of sheep developed in Punjab by crossingA. Merino ram and Bikaneri eweB. Assel ram and White leghorn eweC. Rhode Island ram and White leghorn eweD. Cochin ram and Ghagus ewe. |
| Answer» Correct Answer - A | |
| 336. |
What is the aim of animal breeding? |
| Answer» Correct Answer - Increasing the yield of animals and improving the desirable qualities of the produce | |
| 337. |
Triticum aestivum, the common bread wheat isA. Triploid with 21 chromosomesB. Tetraploid with 28 chromosomesC. Hexaploid with 42 chromosomesD. Diploid with 14 chromosomes |
| Answer» Correct Answer - C | |
| 338. |
A. Name the ways through which breeders create desired genetic variations in plants. B. List the chief objectives of animal breeding. C. What are the three main approaches of animal breeding D. What is quarantine ? E. What is emasculation ? |
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Answer» A. The different ways through which the breeders creats desired genetic variations in plants are listed below : (i) Domestication (ii) Germplasm collection (iii) Plants Introduction (iv) Selection (v) Hybridisation (vi) Polyploidy (vii) Mutation (viii) Genetic engineering B. The chief objectives of animal breeding are listed below : (i) Improvement in growth rate (ii) Increase in the production of milk, meat, egg, wool, etc (iii) Increase in the quality of milk, meat, eggs, wool, etc. (iv) Improvement in disease resistance (v) Increase of productive of productive life span (vi) Increase in the rate of reproduction. C. The three main approaches of animal breeding are (i) Inbreeding, (ii) Out crossing, and (iii) Interspecific hybridisation. D. Quarantine is the legally forced restriction of the movement of diseased plant material or of fungi, bacteria or viruses, that cause diseases in plants. E. Emasculation is the removal of stamens or anthers or killing the pollen grains of the flower without affecting the female reproductive organs. Emasculation is the method to convert a bisexual flower into female flowers. |
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| 339. |
A breed of cow is mated with closely related breed for five generations. It was found that production of milk has reduced subsequently and the animals are not keeping good health. Which of the following methods of animals breeding can overcome this problem?A. HybridisationB. Controlled breedingC. Out-crossingD. Crossing breeding |
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Answer» Correct Answer - C Continued inbreeding reduces fertility and productivity. This is called inbreeding depression. This problem can be overcome by out-crossing. Out-crossing is the practice of mating of animals within the same of their pedigree upto `4-6` generations. The offspring of such a malting is known as out-cross. A single outcross often helps to overcome inbreeding depression. |
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| 340. |
What do we understand by the term breed? |
| Answer» Correct Answer - A group of animals related by descent and similar in most | |
| 341. |
When breeding is between animals of the same breed it is called __________ |
| Answer» Correct Answer - inbreeding | |
| 342. |
(a) Differentiate between inbreeding and outbreeding. (b) Explain inbreeding depression and how it can be overcome. (c ) Mention two advantages of inbreeding programme in cattle |
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Answer» (b) In breeding depression can be overcome by out breeding i.e., mating some selected animals of the breeding population with unrelated superior animals of the same breed that have different ancestors. (c ) Advantage of inbreeding in cattle : (i) Increase the productivity of inbreed population (ii) Elimination or reduction of less desirable gene. (iii) Pure of progeny is obtained. |
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| 343. |
The term 'inbreeding depression' is related toA. increased fertility and productivityB. increased milk productionC. reduced fertility and productivityD. reduced milk production. |
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Answer» Correct Answer - C Continued inbreeding, especially close breeding usually reduces fertility and even productivity. This is called inbreeding depression. |
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| 344. |
What is inbreeding depression ? |
| Answer» Correct Answer - Continued inbreeding, especially close inbreeding, usually reduces fertility and even reproductivity | |
| 345. |
Outbreeding is the breeding of ________animals which may be between individuals of the same breed out having________ |
| Answer» Correct Answer - Unrelayed, no common ancestors or between different breeds or different species | |
| 346. |
How can we restore fertility and yield in case of inbreeding depression ? |
| Answer» Correct Answer - Selected animals of the breeding population should be mated with unrelated superior animals of the same breed. | |
| 347. |
Assertion : In plant tissue culture somatic embryos can be induced from any plant cell. Reason : Any viable plant cell can differentiate into somatic embryos.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If the assertion is true but reason is falseD. If both assertion and reason are false |
| Answer» Correct Answer - A | |
| 348. |
Assertion : Loss of vigour called inbreeding depression occurs when inbreeding is continued for many generations. Reason : Quarantine can be done to overcome the harmful effects of inbreeding depression.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true bur reason is false.D. if both assertion and reason are false. |
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Answer» Correct Answer - C Inbreeding is mating of individual closely related by ancestry. It produces loss of vigour when continued for several generations in plants and animals. This loss of vigour, called inbreeding depression, appears because of increased homozygosity and results in expression of harmful effects of recessive alleles. Quarantine is careful examination of all organism being introduced into a new area for the presence of weeds, insects and disease causing organisms. Quarantine cannot overcome inbreeding depression. |
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| 349. |
Pusa shubhra is a variety ofA. CauliflowerB. ChilliC. WheatD. Cabbage |
| Answer» Correct Answer - A | |
| 350. |
In order to obtain virus-free plants through tissue culture the best method is Or In Crop Improvement Programmer Virus Free clones can be obtained Through Which of the following methods is/are used in recovery of healthy plants from diseased plantsA. Anther cultureB. Meristerm cultureC. Protoplast cultureD. Embroyo rescue |
| Answer» Correct Answer - B | |