Plant Science Mock Test Series for ICAR, JRF, NABARD, BHU, Pre-PG, AFO, AAO, All Agriculture ExamsPlant Science most important MCQ Questions for ICAR, JRF, NABARD, BHU, Pre-PG, AFO, and Other Agriculture Exams0% Plant Science Mock Test Series – 1 1 / 100The situation in which two different alleles for a trait are expressed unblended in the phenotype of heterozygous individuals is called as co – dominance Over dominance Partial dominance No dominance 2 / 100In 1969, the information about ‘Integrator gene’ was given by Bunn et al. Britten and Davidson Hedges and Jacob Cohen et al 3 / 100Gibberellic acid was first discovered from Fungus Animals Minerals Bacteria 4 / 100Use of a DNA or RNA probe to detect the presence of the complementary DNA sequence in cloned bacterial or cultured eukaryotic cells was known as Hybridization Complementation In situ hybridization Polymerase chain reaction 5 / 100Bacterial transformation was reported by R. Brown Avery et. al Beadle & tatum Khorana 6 / 100The best quality of lac is obtained from which host tree ? Ber Kusum Khair Tur 7 / 100A gene, one or more forms Of which isassociated with cancer. Many of these are involved, directly or indirectly, in controlling the rate of cell growth was known as Mutator genes Split genes Sequencing genes Oncogenes 8 / 100The differences present among individuals belonging to a single species or to different species is called as Range Median Standard deviation Variation 9 / 100In maize first product formed during photosynthesis is Oxalic acid PGA Malic acid Aspartic acid 10 / 100The frequency of heterozygotes decreases in the progeny after matings among individuals of two previously isolated subpopulations is called as Wahlund effect Vitrification Darwin effect Lamark effect 11 / 100Which is a natural genetic engineer ? Xanthomonas citri Agrobacterium tumefacience Azatobacter Clostridium 12 / 100An organic compound produced by plants that is required in small amounts in the diet for the normal growth Of animal organisms is known as protein Fat Vitamin Carbohydrates 13 / 100Teichoic acid found in Fungi Gram negative bacteria Gram (+) bacteria Algae 14 / 100Indian Agricultural Research Institute’ Pusa (Bihar) was shifted to Delhi in the year 1928 1936 1956 1959 15 / 100The uredospores Of Puccinia graminis are disseminated by Insect Wind Animals Birds 16 / 100The largest gene found in the genome Of an RNA Virus is polymerase gene Papogenes Retro gene Nucleogenes 17 / 100The harmone ABA was first identified and characterized chemically in 1963 FT Addicott Knott Robinson Salisbury 18 / 100Chromosome number Of Arabidopsis is 8 6 5 4 19 / 100Male sterility is employed for the production of Synthetic seed Hybrid seed Composite seed Pureline 20 / 100The phenomenon in which highly concentrated aqueous solutions of cryoprotective agents become so viscous at a sufficiently low temperature, that they solidify into a metastable glass state, without ice crystal formation at practical cooling rates is called Wahlund effect Vitrification Darwin effect Lamark effect 21 / 100In 1968, the information about ‘Antimutator gene’ was given by Drake and Allen Britten and Davidson Hedges and Jacob Nathans and Smith 22 / 100In 1903, the term ‘cytogenetics’ was coined by Suttan Galton Astbury Chattan 23 / 100The process in which the use Of biologically active sewage sludge to hasten the breakdown of organic matter in raw sewage during secondary treatment is called as Activated-sludge process Active transport process Active immunity process None Of the above 24 / 100A gene in pest which is able to break down the gene of the pest resistance in the plant and thus allows the pest to use the plant as a host is called as Virulent gene Avirulent gene Tolerant gene Immune gene 25 / 100The foot rot Of wheat is caused by the pathogen called Spetoria tritici Tilretia foetida Pythium graminicaum Urocystis agropyri 26 / 100In 1971, the information about ‘Sensor gene’ was given by Larkin and Scocroft Bishop and Varmus Temin and Baltimore Britten and Davidson 27 / 100Bacteriophage is made up of Nucleoprotein Protein only Carbon and sulphur DNA 28 / 100G + C content of prokaryotes is 20 % 42 % 35 % 47 % 29 / 100The causal organism Erysiphe graminisSP. Tritici produces Apothecia Perithecia Cleistothecia Telia 30 / 100Introduction Of DNA into cells by exposing them for very brief periods to high voltage electrical pulses, which is thought to induce transient pores in the plasma lemma is called Osmop Oration Transistion Translation Electroporation 31 / 100Plasmodiophora brassicae causes the club root disease of crucifers can be controlled by Raising pH o Decreasing pH of the soil Both (a) and (b) None of these 32 / 100Agrobacterigm rhizogenes cause the formation of Tap roots Fibrous roots Adventitious roots All Of the above 33 / 100The Indian born scientist, who was awarded the Nobel prize for DNA synthesis Mendel Crick Watson Har Gobind Khorana 34 / 100A sequencing approach that uses several pooled samples simultaneously, greatly increasing sequencing speed was known as Unisequencing Simultaneous sequencing Multiplexing Active sequencing 35 / 100The origin of maize is from America India Pakistan China 36 / 100rDNA technology has application in Medicine Agriculture Industries All of these 37 / 100The powdery mildew of wheat is associated with fungi named Erysiphe graminis sp. tritici Erysiphe polygoni Erysiphe graminis Sp. hordei None Of these 38 / 100Insect jelly is composed of Pectin + Sugar Sucrose only Fructose Only Glucose 39 / 100Multiline and mixtures employ a series of resistance genes so that their plant populations together show some resistance to an the races of the pathogen. This type of resistance is often called as Synthetic vertical resistance Synthetic horizontal resistance Vander plank effect None of the above 40 / 100In 1896, the ear to row method of breeding was given by1896 में, प्रजनन की कान से पंक्ति विधि किसके द्वारा दी गई थी Shull Hull Hopkins Koelreuter 41 / 100The measure of uncontrolled variation present in a sample is called Variance Standard deviation Standard error Mean deviation 42 / 100The cause of association between two variables can be measured by Correlation analysis Regression analysis Path co-efficient analysis Stability analysis 43 / 100Insertion Of normal DNA directly into cells of human beings to correct a genetic defect was known as Human gene correction Human genome project Human gene therapy Human euphenics 44 / 100‘AGMARK Packaging Processing Quality Distrbution 45 / 100The simultaneous manipulation of several characters for genetic improvement of economic yield is called Selection index Selection criteria Selection gain Hybrid index 46 / 100Fusion of male and gametes from the same plant is called Self-pollination Cross pollination Self-fertilization Cross fertilization 47 / 100The alleles of a specific gene or all of the genes carried by an organism is called Genotype Phenoype Trait Operon sequence 48 / 100In Vr-Wr graph, when regression lines passes through the origin, indicates Incomplete dominance Over dominance Complete dominance Pseudo dominance 49 / 100The adjacent cell of the same fungal hypha brought into communication with each other by means of loops is known Clamp connection Appressorium Capsid Cleistothecia 50 / 100Race specific resistance i.e., resistance that operates against some races of a pathogen and not to others in plants are also known as Vertical resistance Vanderplank effect Horizonthal resistance Immune resistance 51 / 100Pollen basket is the other name for Femur Stylet Scoba Antennae 52 / 100An epidemic development in a variety carrying vertical resistance genes, and a low level of horizontal resistance, leading to heavy economic losses is referred to as Vertical resistance Vertifolia effect Horizontal resistance Immune resistance 53 / 100The average oil Content of castor seed is : 20 % 47 % 26 % 30 % 54 / 100Burgundy mixture contains sodium carbonate in place of CaC03 as in Bordeaux mixture was discovered in the year 1887 1867 1877 1897 55 / 100The study of differences and similarities in genome structure and organization of different organisms is called Comparative genomics Eugenics Euphenics Cryobiology 56 / 100A genetic marker that is detected as differential mobility of a Protein / DNA fragment or as differential amplification of a DNA sequence present in different individuals is known as Suppressor gene Molecular marker Effector gene Modifying genes 57 / 100The major functions of ABA is/are Inhibition of RNA synthesis Effect the plasma membrane Inhibition of translation All of-these 58 / 100A localized collection of pus in a cavity formed by tissue disintegration is called Acervulus Acid curd Abcess All of these 59 / 100In 1925, the terms prokaryotes and eukaryotes was coined by Negaheru Priestley Renner Chattan 60 / 100The synthesis of cell constituent; from Simpler molecules, usually requiring energy is called as Nitrobolism Catabolism Anabolism None of these 61 / 100Wheat protein is called as Zein Ricin Gluten Durin 62 / 100The family of locust is Noctuidae Alerrodidae Acrididae Chalcidae 63 / 100The disease damping off seedlings during nursery Stage is caused by the pathogen Phygoderma maydis Pythium debaryanum Pyhtium amphanidermatum Both (b) and (c) 64 / 100The decomposition of organic nitrogen Compounds, e.g., proteins, by microorganisms with the release of ammonia is called as Intrafraction Ammonification Denitrification All of the above 65 / 100The book ‘Plant Disease’ written by AP Sinha KC Mehta VS Singh RS Singh 66 / 100Milk protein coagulated by acid is termed as Acervulus Acid curd Abcess All of these 67 / 100The ‘black wart disease’ of potato specially confined to Darjeeling hills is caused by the pathogen called Phytophthora infestans Burkholderia solanacearum Synchytriunt endobiolicum Rhizoctonia solani 68 / 100The first and subsequent generation progenies of crosses of heterozygous facultative apomicts are called as Cybrid Pureliné Hybrid Vybrid 69 / 100The DNA base sequences interrupting the protein- coding sequences of a gene; these sequences are transcribed into RNA but are cut out of the message before it is translated into protein was known as Anticodon Intron Cistron Exon 70 / 100The sclerotial rot of barley is caused by the pathogen called Pellicularia rolfsii Helminthosporium teres Ustilago hordei Ustilago nida 71 / 100Bacteria are considered to be plant because Multiply by fission Cosmopolitan They cannot move Have cell wall 72 / 100first time quarantine is started in India at : New Delhi Chennai Kolkata Mumbai 73 / 100The loose smut of barley is caused by the pathogen called Pellicularia rolfsii Helminthosporium teres ustilago hordei Ustilago nuda 74 / 100The quickest way to produce homozygous breeding lines from heterozygous parents is through Hybrids Purelines Double haploids Synthetics 75 / 100Gram-positive bacteria that are characterized by the formation of branching filaments will be called as Actinomycetes Basidiomycetes Both of these None Of these 76 / 100All bacteria having a conjugative plasmid will have Drug resistance Flagella Sex pili All of these 77 / 100Maize that produces kernels in which the starch that is contained within those kernels having at least 99 percent amylopectin, versus the average of 72- 76 percent amylopectin in common starch seed can be referred as Albino maize Vitrimaize Waxy maize Opaque maize 78 / 100In 1964, Opaque-2 mutant of maize was given by Mehta, K.C, Mock and Pearce Mertz Mather, K 79 / 100In Yr-Wr graph, when regression lines passes above the origin cutting Wr-axis, indicates Partial dominance Over dominance Complete dominance Pseudo dominance 80 / 100The plants obtained through genetic engineering contain a gene or genes usually from an unrelated organism are called Recombination plants Protoplast segregants Transgenic plants Transgressive segregants 81 / 100Isopentenyl adenine is a precursor for Cytokinin Giberrelin Auxin None of these 82 / 100A sequence located near the 5′-end of a domain that contains a cluster of DN Aase I hypersensitive sites and is essential for the expression of transcriptional units located within the domain is known as Locus control region (LCR) Expression region Sequence region Genetic region 83 / 100In 1976, the information about ‘Protooncogene to oncogene relationship’ was given by Crick Bishop and Vann us Barren et al Hozumi and Tonigawa 84 / 100When a disease occurs periodically in a widespread area causing devastating damage to crop plants, it is known as Epidemic disease Sporadic disease Endemic disease Pandemic disease 85 / 100An asexual fruiting body or reproductive structure in a fungus is commonly known as Acervulus Acid curd Abcess All Of these 86 / 100The protective sheath that covers the young shoot of the embryo in plants of the family Gramineae is called as Endosperm Coleoptile Protoplast Coleorhiza 87 / 100The proportion of different alleles of a gene present in a mendeiran population are known as Gametic pool Gene frequency Founder principle Genetic homoeostasis 88 / 100The bunt of wheat is caused-by the pathogen called Spetona tritici Tilletia foetida Drechslera sorokiniana Urocystis agropyri 89 / 100Improvement Of yield by making a selection for a component character is called Direct selection Indirect selection Component selection Disruptive selection 90 / 100A type of antigen-antibody reaction marked by an exaggerated physiological response to a substance in sensitive individuals is called as Resistance Tolerance Allergy None of these 91 / 100The study of the application of computer and statistical techniques to the management of information was known as Informatics Bio-technology Biometrics Information technology 92 / 100Which species contain Ti-plasmid i.e, tumour inducing plasmid ? Agrobacterium tumifaciens Aspergillus nidulgns Agrobacterium rhizogenes Aspergillus oryzae 93 / 100Loss of chromosome segment is known as Deletion Duplication Heterotic-segment Addition 94 / 100A gene, which produces a product or phenotype that can be easily and unequivocally detected through simple tests is called as Reporter gene Operator gene Silencer gene Regulator gene 95 / 100The proportion Of migrant individuals to the total number (after migration) of individuals in the population is called Segregation ratio Migration ratio Recombination ratio Transgressive ratio 96 / 100Ca is needed for synthesis of Cell wall Nucleolus Nucleus Chloroplast 97 / 100Pollination between the pollen and stigma within the same flower Of the same plant is called as Self-pollination Cross pollination Self-fertilization Cross fertilization 98 / 100The compounds, Which act as inhibitors of transpiration rate through their highly specific action on guard cells is called as Anti-transpirants Antioxidants Anti-xenosis None Of these 99 / 100National Plant Protection Training Institute is located at New Delhi Chennai Hyderabad Indore 100 / 100Fractional sterilization is : Appertization Tyndalization Pasteurization Cold sterilization Your score isThe average score is 26% 0% ICAR-JRF Plant Science Mock Test Series