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Delhi University Entrance Test (DUET) 2020 Previous Year Question Paper With Answer Key

This post was last modified on 27 December 2020

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DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA


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Topic:- PMBB MSC S2

  1. A bacterium, which loses its ability to synthesize one or more organic compounds, is called [Question ID = 3089]
    1. Heterotroph [Option ID = 12350]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. Prototroph [Option ID = 12351]
    3. Auxotroph [Option ID = 12352]
    4. Autotroph [Option ID = 12353]
    Correct Answer :-
    • Auxotroph [Option ID = 12352]

    2. --- Content provided by​ FirstRanker.com ---

  2. Bacterial recombination, mediated by bacteriophages, is called [Question ID = 3090]
    1. Conjugation [Option ID = 12354]
    2. Transformation [Option ID = 12355]
    3. Transduction [Option ID = 12356]
    4. Segregation [Option ID = 12357]
    Correct Answer :-
    • Transduction [Option ID = 12356]

      • --- Content provided by‍ FirstRanker.com ---

  3. Complementation analysis using bacteriophages was performed by [Question ID = 3091]
    1. Joshua Lederberg [Option ID = 12358]
    2. Seymour Benzer [Option ID = 12359]
    3. Jacques Monod [Option ID = 12360]
    4. Alfred Hershey [Option ID = 12361]

      5. --- Content provided by⁠ FirstRanker.com ---

    Correct Answer :-
    • Seymour Benzer [Option ID = 12359]
  4. During translation initiation, bacterial ribosomal subunits bind to mRNA at the [Question ID = 3092]
    1. AUG codon [Option ID = 12362]
    2. First intron [Option ID = 12363]
    3. TATA box [Option ID = 12364]

      4. --- Content provided by‌ FirstRanker.com ---

    4. Shine-Delgarno sequence [Option ID = 12365]
    Correct Answer :-
    • Shine-Delgarno sequence [Option ID = 12365]
  5. The lac operon can be induced by [Question ID = 3093]
    1. X-gal [Option ID = 12366]
    2. NADP [Option ID = 12367]

      3. --- Content provided by‌ FirstRanker.com ---

    3. ATP [Option ID = 12368]
    4. IPTG [Option ID = 12369]
    Correct Answer :-
    • IPTG [Option ID = 12369]
  6. Trp repressor controls an operon which encodes genes responsible for [Question ID = 3094]
    1. Conversion of tryptophan to phenylalanine [Option ID = 12370]

      2. --- Content provided by​ FirstRanker.com ---

    2. Conversion of phenylalanine to tryptophan [Option ID = 12371]
    3. Degradation of tryptophan [Option ID = 12372]
    4. Biosynthesis of tryptophan [Option ID = 12373]
    Correct Answer :-
    • Biosynthesis of tryptophan [Option ID = 12373]

    7. --- Content provided by FirstRanker.com ---

  7. A modified base wyosine is found in [Question ID = 3095]
    1. tRNA [Option ID = 12374]
    2. siRNA [Option ID = 12375]
    3. rRNA [Option ID = 12376]
    4. mRNA [Option ID = 12377]
    Correct Answer :-
    • tRNA [Option ID = 12374]

      • --- Content provided by‌ FirstRanker.com ---

  8. Rust disease of wheat is caused by a [Question ID = 3096]
    1. Virus [Option ID = 12378]
    2. Bacterium [Option ID = 12379]
    3. Nematode [Option ID = 12380]
    4. Fungus [Option ID = 12381]

      5. --- Content provided by‌ FirstRanker.com ---

    Correct Answer :-
    • Fungus [Option ID = 12381]
  9. Upon pathogen attack, some plants exhibit a reaction known as Hypersensitive Response (HR), which involves [Question ID = 3097]
    1. Rapid multiplication of infected cells [Option ID = 12382]
    2. Dedifferentiation of the affected tissue [Option ID = 12383]
    3. Increased vasculature in the infected region [Option ID = 12384]

      4. --- Content provided by⁠ FirstRanker.com ---

    4. Rapid localized cell death [Option ID = 12385]
    Correct Answer :-
    • Rapid localized cell death [Option ID = 12385]
  10. Which hormone is responsible for the "Witch's broom" disease? [Question ID = 3098]
    1. Cytokinin [Option ID = 12386]
    2. ABA [Option ID = 12387]

      3. --- Content provided by‌ FirstRanker.com ---

    3. Gibberellin [Option ID = 12388]
    4. Ethylene [Option ID = 12389]
    Correct Answer :-
    • Cytokinin [Option ID = 12386]
  11. Precursor for ethylene biosynthesis is [Question ID = 3099]
    1. Tryptophan [Option ID = 12390]

      2. --- Content provided by‌ FirstRanker.com ---

    2. Methionine [Option ID = 12391]
    3. Arginine [Option ID = 12392]
    4. Ornithine [Option ID = 12393]
    Correct Answer :-
    • Methionine [Option ID = 12391]

    12. --- Content provided by‌ FirstRanker.com ---

  12. Which feature of the following is characteristic of a monocot embryo? [Question ID = 3100]
    1. Asymmetric division of the embryo [Option ID = 12394]
    2. Octant stage [Option ID = 12395]
    3. Establishment of bilateral asymmetry [Option ID = 12396]
    4. Lateral differentiation of the SAM [Option ID = 12397]
    Correct Answer :-
    • Lateral differentiation of the SAM [Option ID = 12397]

      • --- Content provided by FirstRanker.com ---

  13. Seeds of which of the following plants are non-endospermic? [Question ID = 3101]
    1. Custard apple [Option ID = 12398]
    2. Orchid [Option ID = 12399]
    3. Wheat [Option ID = 12400]
    4. Mango [Option ID = 12401]

      5. --- Content provided by​ FirstRanker.com ---

    Correct Answer :-
    • Orchid [Option ID = 12399]
  14. Amygdalin, a well-known cyanogenic glycoside, is found in [Question ID = 3102]
    1. Tea [Option ID = 12402]
    2. Coffee [Option ID = 12403]
    3. Cassava [Option ID = 12404]

      4. --- Content provided by‍ FirstRanker.com ---

    4. Bitter almond [Option ID = 12405]
    Correct Answer :-
    • Bitter almond [Option ID = 12405]
  15. Which of the following photoreceptors in plants exists in two photo-interconvertible forms? [Question ID = 3103]
    1. Cryptochrome [Option ID = 12406]
    2. Phytochrome [Option ID = 12407]

      3. --- Content provided by​ FirstRanker.com ---

    3. Phototropin [Option ID = 12408]
    4. B-carotene [Option ID = 12409]
    Correct Answer :-
    • Phytochrome [Option ID = 12407]
  16. Which of the following enzymes plays a role in light-induced stomatal opening? [Question ID = 3104]
    1. K+-ATPase [Option ID = 12410]

      2. --- Content provided by​ FirstRanker.com ---

    2. Na+-ATPase [Option ID = 12411]
    3. Ca2+-ATPase [Option ID = 12412]
    4. H+-ATPase [Option ID = 12413]
    Correct Answer :-
    • H+-ATPase [Option ID = 12413]

    17. --- Content provided by‍ FirstRanker.com ---

  17. Exposure of DNA to ultraviolet light commonly leads to [Question ID = 3105]
    1. Formation of thymine dimers [Option ID = 12414]
    2. Formation of adenine dimers [Option ID = 12415]
    3. Adenine to thymine conversion [Option ID = 12416]
    4. Thymine to adenine conversion [Option ID = 12417]
    Correct Answer :-
    • Formation of thymine dimers [Option ID = 12414]

      • --- Content provided by​ FirstRanker.com ---

  18. Movements in a compound leaf of leguminous plants occur due to ionic changes in [Question ID = 3106]
    1. Petiole [Option ID = 12418]
    2. Pinnules [Option ID = 12419]
    3. Pulvinus [Option ID = 12420]
    4. Bundle sheath cells [Option ID = 12421]

      5. --- Content provided by‌ FirstRanker.com ---

    Correct Answer :-
    • Pulvinus [Option ID = 12420]
  19. Which of the following hormones is involved in vivipary? [Question ID = 3107]
    1. Abscisic acid [Option ID = 12422]
    2. Jasmonic acid [Option ID = 12423]
    3. Cytokinin [Option ID = 12424]

      4. --- Content provided by FirstRanker.com ---

    4. Ethylene [Option ID = 12425]
    Correct Answer :-
    • Abscisic acid [Option ID = 12422]
  20. In a germinating seed of barley, gibberellin is synthesized in the [Question ID = 3108]
    1. Endosperm [Option ID = 12426]
    2. Embyronic axis [Option ID = 12427]

      3. --- Content provided by‌ FirstRanker.com ---

    3. Seed coat [Option ID = 12428]
    4. Aleurone layer [Option ID = 12429]
    Correct Answer :-
    • Embyronic axis [Option ID = 12427]
  21. The 'Acid-Growth Hypothesis' for auxin action was proposed by [Question ID = 3109]
    1. F.W. Went and K.V. Thimann [Option ID = 12430]

      2. --- Content provided by‌ FirstRanker.com ---

    2. D. Rayle and R. Cleland [Option ID = 12431]
    3. C. Hamner and J.D. Bonner [Option ID = 12432]
    4. S.B. Hendricks and H. Borthwick [Option ID = 12433]
    Correct Answer :-
    • D. Rayle and R. Cleland [Option ID = 12431]

    22. --- Content provided by​ FirstRanker.com ---

  22. The most common precursor of the plant hormone indole-3-acetic acid is [Question ID = 3110]
    1. Methionine [Option ID = 12434]
    2. Phenyalanine [Option ID = 12435]
    3. Tyrosine [Option ID = 12436]
    4. Tryptophan [Option ID = 12437]
    Correct Answer :-
    • Tryptophan [Option ID = 12437]

      • --- Content provided by‌ FirstRanker.com ---

  23. During embryo development in plants, PIN proteins are primarily involved in [Question ID = 3111]
    1. Regulating cell division [Option ID = 12438]
    2. Regulating cell elongation [Option ID = 12439]
    3. Regulation of gene expression [Option ID = 12440]
    4. Establishment of auxin gradient [Option ID = 12441]

      5. --- Content provided by FirstRanker.com ---

    Correct Answer :-
    • Establishment of auxin gradient [Option ID = 12441]
  24. Which of the following processes is NOT carried out mainly by mitochondria? [Question ID = 3112]
    1. Biosynthesis of cardiolipin [Option ID = 12442]
    2. Biosynthesis of fatty acids [Option ID = 12443]
    3. Catabolism of amino acids [Option ID = 12444]

      4. --- Content provided by FirstRanker.com ---

    4. Generation of reactive oxygen species [Option ID = 12445]
    Correct Answer :-
    • Biosynthesis of fatty acids [Option ID = 12443]
  25. Which of the following molecules CANNOT serve as a terminal electron acceptor in bacterial electron-transport chain? [Question ID = 3113]
    1. Oxygen [Option ID = 12446]
    2. Sulfate [Option ID = 12447]

      3. --- Content provided by​ FirstRanker.com ---

    3. Fumarate [Option ID = 12448]
    4. Magnesium [Option ID = 12449]
    Correct Answer :-
    • Magnesium [Option ID = 12449]
  26. Which of the following is NOT universally encoded by the mitochondrial DNA? [Question ID = 3114]
    1. Small ribosomal RNA [Option ID = 12450]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. Large ribosomal RNA [Option ID = 12451]
    3. A cytochrome oxidase subunit [Option ID = 12452]
    4. Transfer RNA [Option ID = 12453]
    Correct Answer :-
    • Transfer RNA [Option ID = 12453]

    27. --- Content provided by‍ FirstRanker.com ---

  27. Which of the following cytoskeletal filaments are abundant in an animal cell nucleus? [Question ID = 3115]
    1. Microfilaments [Option ID = 12454]
    2. Microtubules [Option ID = 12455]
    3. Lamins [Option ID = 12456]
    4. Spectrin filaments [Option ID = 12457]
    Correct Answer :-
    • Lamins [Option ID = 12456]

      • --- Content provided by​ FirstRanker.com ---

  28. Consider the structure of a sarcomere. Which of its features DOES NOT shorten during skeletal muscle contraction? [Question ID = 3116]
    1. The dark band [Option ID = 12458]
    2. The light band [Option ID = 12459]
    3. The distance from the M-line to the Z-disc [Option ID = 12460]
    4. The distance between two consecutive Z-discs [Option ID = 12461]

      5. --- Content provided by⁠ FirstRanker.com ---

    Correct Answer :-
    • The dark band [Option ID = 12458]
  29. Which is the most common polymer present in the plant secondary cell wall but not the primary cell wall? [Question ID = 3117]
    1. Cellulose [Option ID = 12462]
    2. Hemicellulose [Option ID = 12463]
    3. Lignin [Option ID = 12464]

      4. --- Content provided by‌ FirstRanker.com ---

    4. Starch [Option ID = 12465]
    Correct Answer :-
    • Lignin [Option ID = 12464]
  30. Which of the following statement is true for increasing the resolution of electron microscope? [Question ID = 3118]
    1. Electromagnetic lenses determine the resolution [Option ID = 12466]
    2. Wavelength of electron beam determines the resolution [Option ID = 12467]

      3. --- Content provided by‍ FirstRanker.com ---

    3. Thickness of specimen determines the resolution [Option ID = 12468]
    4. Electron dense region in the specimen determines the resolution [Option ID = 12469]
    Correct Answer :-
    • Wavelength of electron beam determines the resolution [Option ID = 12467]
  31. In a diploid organism, Law of Segregation results in [Question ID = 3119]
    1. Separation of alleles [Option ID = 12470]

      2. --- Content provided by FirstRanker.com ---

    2. Separation of genes on one chromosome [Option ID = 12471]
    3. Segregation of individuals [Option ID = 12472]
    4. Segregation of male and female gametes [Option ID = 12473]
    Correct Answer :-
    • Separation of alleles [Option ID = 12470]

    32. --- Content provided by​ FirstRanker.com ---

  32. Plant protoplasts are [Question ID = 3120]
    1. Precursors of amyloplasts [Option ID = 12474]
    2. Plant cells without cell walls [Option ID = 12475]
    3. Primitive cells [Option ID = 12476]
    4. Cytoplasm without plasma membrane [Option ID = 12477]
    Correct Answer :-
    • Plant cells without cell walls [Option ID = 12475]

      • --- Content provided by FirstRanker.com ---

  33. Which of the following scientists discovered mobile genetic elements? [Question ID = 3121]
    1. S. Tonegawa [Option ID = 12478]
    2. S. Brenner [Option ID = 12479]
    3. B. McClintock [Option ID = 12480]
    4. L.B. Buck [Option ID = 12481]

      5. --- Content provided by‌ FirstRanker.com ---

    Correct Answer :-
    • B. McClintock [Option ID = 12480]
  34. Transferred DNA from Ti-plasmid is maintained in a transgenic plant as [Question ID = 3122]
    1. An independent linear replicon [Option ID = 12482]
    2. An independent circular replicon [Option ID = 12483]
    3. Integrated DNA in chromosome [Option ID = 12484]

      4. --- Content provided by‌ FirstRanker.com ---

    4. Multiple independent copies of introduced DNA [Option ID = 12485]
    Correct Answer :-
    • Integrated DNA in chromosome [Option ID = 12484]
  35. Metabolomics is primarily the study of the [Question ID = 3123]
    1. Entire suite of metabolites [Option ID = 12486]
    2. Metabolism [Option ID = 12487]

      3. --- Content provided by FirstRanker.com ---

    3. Proteins involved in metabolism [Option ID = 12488]
    4. Enzymes [Option ID = 12489]
    Correct Answer :-
    • Entire suite of metabolites [Option ID = 12486]
  36. Dideoxynucleotide lacks [Question ID = 3124]
    1. 3'OH [Option ID = 12490]

      2. --- Content provided by‍ FirstRanker.com ---

    2. 2'OH [Option ID = 12491]
    3. Phosphate group [Option ID = 12492]
    4. 3'OH and 2'OH [Option ID = 12493]
    Correct Answer :-
    • 3'OH and 2'OH [Option ID = 12493]

    37. --- Content provided by FirstRanker.com ---

  37. Which of the following is a selectable marker gene? [Question ID = 3125]
    1. Gfp [Option ID = 12494]
    2. Luciferase [Option ID = 12495]
    3. gus [Option ID = 12496]
    4. nptll [Option ID = 12497]
    Correct Answer :-
    • nptll [Option ID = 12497]

      • --- Content provided by​ FirstRanker.com ---

  38. A plant cell contains circular DNA in [Question ID = 3126]
    1. One organelle [Option ID = 12498]
    2. Two organelles [Option ID = 12499]
    3. Three organelles [Option ID = 12500]
    4. Four organelles [Option ID = 12501]

      5. --- Content provided by FirstRanker.com ---

    Correct Answer :-
    • Two organelles [Option ID = 12499]
  39. cDNA is synthesized by [Question ID = 3127]
    1. RNA polymerase I [Option ID = 12502]
    2. RNA polymerase II [Option ID = 12503]
    3. RNA polymerase III [Option ID = 12504]

      4. --- Content provided by FirstRanker.com ---

    4. Reverse transcriptase [Option ID = 12505]
    Correct Answer :-
    • Reverse transcriptase [Option ID = 12505]
  40. Northern hybridization is related to [Question ID = 3128]
    1. Detection of DNA [Option ID = 12506]
    2. Detection of RNA [Option ID = 12507]

      3. --- Content provided by⁠ FirstRanker.com ---

    3. Detection of protein [Option ID = 12508]
    4. Detection of DNA and RNA [Option ID = 12509]
    Correct Answer :-
    • Detection of RNA [Option ID = 12507]
  41. Introns are present at the level of [Question ID = 3129]
    1. Genomic DNA [Option ID = 12510]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. cDNA [Option ID = 12511]
    3. mRNA [Option ID = 12512]
    4. Protein [Option ID = 12513]
    Correct Answer :-
    • Genomic DNA [Option ID = 12510]

    42. --- Content provided by‌ FirstRanker.com ---

  42. Which of the following scientists was given Nobel Prize for discovery of restriction enzymes? [Question ID = 3130]
    1. P. Berg [Option ID = 12514]
    2. A. Klug [Option ID = 12515]
    3. W. Arber [Option ID = 12516]
    4. F. Sanger [Option ID = 12517]
    Correct Answer :-
    • W. Arber [Option ID = 12516]

      • --- Content provided by​ FirstRanker.com ---

  43. Which of the following plants is useful for cancer therapy? [Question ID = 3131]
    1. Rauwolfia serpentina [Option ID = 12518]
    2. Dioscorea deltoidea [Option ID = 12519]
    3. Taxus brevifolia [Option ID = 12520]
    4. Atropa belladonna [Option ID = 12521]

      5. --- Content provided by⁠ FirstRanker.com ---

    Correct Answer :-
    • Taxus brevifolia [Option ID = 12520]
  44. Which of the following plants is a commercial source of an artificial sweetener? [Question ID = 3132]
    1. Stevia rebaudiana [Option ID = 12522]
    2. Atropa belladonna [Option ID = 12523]
    3. Papaver somnifera [Option ID = 12524]

      4. --- Content provided by⁠ FirstRanker.com ---

    4. Cinchona officinalis [Option ID = 12525]
    Correct Answer :-
    • Stevia rebaudiana [Option ID = 12522]
  45. Which of the following biological systems is a predominant source of the 'Luciferase' enzyme? [Question ID = 3133]
    1. Photinus pyralis [Option ID = 12526]
    2. Drosophila melanogaster [Option ID = 12527]

      3. --- Content provided by​ FirstRanker.com ---

    3. Escherichia coli [Option ID = 12528]
    4. Saccharomyces cerevisiae [Option ID = 12529]
    Correct Answer :-
    • Photinus pyralis [Option ID = 12526]
  46. Which of the following biological species is the predominant source of 'Taq polymerase enzyme'? [Question ID = 3134]
    1. Thermus aquaticus [Option ID = 12530]

      2. --- Content provided by FirstRanker.com ---

    2. Thermus antranikianii [Option ID = 12531]
    3. Thermus igniterrae [Option ID = 12532]
    4. Thermus tengchongensis [Option ID = 12533]
    Correct Answer :-
    • Thermus aquaticus [Option ID = 12530]

    47. --- Content provided by​ FirstRanker.com ---

  47. Who is credited for propounding the PCR technique? [Question ID = 3135]
    1. K. Mullis [Option ID = 12534]
    2. S. Altman [Option ID = 12535]
    3. M.W. Nirenberg [Option ID = 12536]
    4. H.G. Khorana [Option ID = 12537]
    Correct Answer :-
    • K. Mullis [Option ID = 12534]

      • --- Content provided by FirstRanker.com ---

  48. Which of the following scientists is credited for the "Green Revolution"? [Question ID = 3136]
    1. N. Borlaug [Option ID = 12538]
    2. G. Haberlandt [Option ID = 12539]
    3. G. Mendel [Option ID = 12540]
    4. C. Darwin [Option ID = 12541]

      5. --- Content provided by‌ FirstRanker.com ---

    Correct Answer :-
    • N. Borlaug [Option ID = 12538]
  49. IR-8 is a popular variety of [Question ID = 3137]
    1. Wheat [Option ID = 12542]
    2. Rice [Option ID = 12543]
    3. Maize [Option ID = 12544]

      4. --- Content provided by‍ FirstRanker.com ---

    4. Cotton [Option ID = 12545]
    Correct Answer :-
    • Rice [Option ID = 12543]
  50. The golden colour of 'Golden rice' is due to excess levels of [Question ID = 3138]
    1. Xanthophyll [Option ID = 12546]
    2. Carotene [Option ID = 12547]

      3. --- Content provided by‌ FirstRanker.com ---

    3. Phycoerythrin [Option ID = 12548]
    4. Bilirubin [Option ID = 12549]
    Correct Answer :-
    • Carotene [Option ID = 12547]
  51. RFLP analysis is a technique that [Question ID = 3139]
    1. Uses hybridization to detect specific DNA restriction fragments in genomics DNA [Option ID = 12550]

      2. --- Content provided by‍ FirstRanker.com ---

    2. Measures the transfer frequency of genes during conjugation [Option ID = 12551]
    3. Is used to detect genetic variation at the protein level [Option ID = 12552]
    4. Is used to amplify genes for producing useful products [Option ID = 12553]
    Correct Answer :-
    • Uses hybridization to detect specific DNA restriction fragments in genomics DNA [Option ID = 12550]

    52. --- Content provided by‍ FirstRanker.com ---

  52. Plasmid cloning vectors [Question ID = 3140]
    1. Can generally accommodate larger inserts than phage vectors [Option ID = 12554]
    2. Can replicate within bacteria [Option ID = 12555]
    3. Can accommodate inserts of over 100 kilobases [Option ID = 12556]
    4. Include centromeres to allow propagation in yeast. [Option ID = 12557]
    Correct Answer :-
    • Can replicate within bacteria [Option ID = 12555]

      • --- Content provided by⁠ FirstRanker.com ---

  53. On an average, how many fragments would a restriction enzyme which recognizes a specific 4 base sequence in DNA be expected to cleave a double-stranded bacteriophage with a genome size of 5,000 bp into ? [Question ID = 3141]
    1. About 2 [Option ID = 12558]
    2. About 4 [Option ID = 12559]
    3. About 20 [Option ID = 12560]
    4. About 50 [Option ID = 12561]

      5. --- Content provided by‌ FirstRanker.com ---

    Correct Answer :-
    • About 20 [Option ID = 12560]
  54. QTL analysis is used to [Question ID = 3142]
    1. Identify RNA polymerase binding sites [Option ID = 12562]
    2. Determine which genes are expressed at a developmental stage [Option ID = 12563]
    3. Identify chromosome regions associated with a quantitative trait [Option ID = 12564]

      4. --- Content provided by‌ FirstRanker.com ---

    4. Identify the most rapidly-evolving parts ofgenes [Option ID = 12565]
    Correct Answer :-
    • Identify chromosome regions associated with a quantitative trait [Option ID = 12564]
  55. Double fertilization involves [Question ID = 3143]
    1. Fertilization of the egg by two male gametes [Option ID = 12566]
    2. Fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube [Option ID = 12567]

      3. --- Content provided by FirstRanker.com ---

    3. Fertilization of the egg and the central cell by two sperms brought by different pollen tubes [Option ID = 12568]
    4. Fertilization of the egg and the central cell by two sperms brought by the same pollen tube [Option ID = 12569]
    Correct Answer :-
    • Fertilization of the egg and the central cell by two sperms brought by the same pollen tube [Option ID = 12569]
  56. At which stage of development the male gametophyte is surrounded by a callose wall? [Question ID = 3144]
    1. Mature 3-celled stage [Option ID = 12570]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. Bi-celled stage [Option ID = 12571]
    3. Single cell stage [Option ID = 12572]
    4. Pollen Mother Cell stage [Option ID = 12573]
    Correct Answer :-
    • Pollen Mother Cell stage [Option ID = 12573]

    57. --- Content provided by‍ FirstRanker.com ---

  57. Which one of the following enzymes is substrate inducible? [Question ID = 3145]
    1. Triose phosphate isomerase [Option ID = 12574]
    2. Glyceraldehyde phosphate dehydrogenase [Option ID = 12575]
    3. Nitrate reductase [Option ID = 12576]
    4. Hexose isomerase. [Option ID = 12577]
    Correct Answer :-
    • Nitrate reductase [Option ID = 12576]

      • --- Content provided by​ FirstRanker.com ---

  58. The Lemma and Palea in cereal flowers are [Question ID = 3146]
    1. Modified sepals [Option ID = 12578]
    2. Fused sepals and petals [Option ID = 12579]
    3. Modified glumes [Option ID = 12580]
    4. Nectaries [Option ID = 12581]

      5. --- Content provided by​ FirstRanker.com ---

    Correct Answer :-
    • Modified glumes [Option ID = 12580]
  59. Oxytocin is a [Question ID = 3147]
    1. Peptidal hormone [Option ID = 12582]
    2. Steroidal hormone [Option ID = 12583]
    3. Transcriptional factor [Option ID = 12584]

      4. --- Content provided by​ FirstRanker.com ---

    4. Hormonal receptor [Option ID = 12585]
    Correct Answer :-
    • Peptidal hormone [Option ID = 12582]
  60. Which of the following is a zinc containing protein? [Question ID = 3148]
    1. Nitrogenase [Option ID = 12586]
    2. Calmodulin [Option ID = 12587]

      3. --- Content provided by‌ FirstRanker.com ---

    3. Nitrate reductase [Option ID = 12588]
    4. Alcohol dehydrogenase [Option ID = 12589]
    Correct Answer :-
    • Alcohol dehydrogenase [Option ID = 12589]
  61. Which of the following is a metalloprotein? [Question ID = 3149]
    1. Nitrogenase [Option ID = 12590]

      2. --- Content provided by⁠ FirstRanker.com ---

    2. Hexokinase [Option ID = 12591]
    3. Triose phosphate isomerase [Option ID = 12592]
    4. Desmosine [Option ID = 12593]
    Correct Answer :-
    • Nitrogenase [Option ID = 12590]

    62. --- Content provided by‌ FirstRanker.com ---

  62. In sodium dodecyl sulphate structure which groups are found in multiples? [Question ID = 3150]
    1. Na [Option ID = 12594]
    2. Sulphate [Option ID = 12595]
    3. CH2 [Option ID = 12596]
    4. CH3 [Option ID = 12597]
    Correct Answer :-
    • CH2 [Option ID = 12596]

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  63. If photosynthesis is carried out in presence of CO2 carrying labelled oxygen, which molecules produced would not carry radiolabel? [Question ID = 3151]
    1. 3-phospho glyceraldehyde [Option ID = 12598]
    2. Ribulose 5 phosphate [Option ID = 12599]
    3. Sedoheptulose [Option ID = 12600]
    4. Oxygen [Option ID = 12601]

      5. --- Content provided by⁠ FirstRanker.com ---

    Correct Answer :-
    • Oxygen [Option ID = 12601]
  64. Which enzyme is involved in dissipation of energy in NADH as heat in plant mitochondria? [Question ID = 3152]
    1. Glycolate oxidase [Option ID = 12602]
    2. Alternative oxidase [Option ID = 12603]
    3. Succinate dehydrogenase [Option ID = 12604]

      4. --- Content provided by‍ FirstRanker.com ---

    4. Cytochrome oxidase [Option ID = 12605]
    Correct Answer :-
    • Alternative oxidase [Option ID = 12603]
  65. When intact mitochondria are disrupted by treatment with detergent, the resulting membrane fragments can still catalyze electron transfer from succinate or NADH to O2, without ATP production. What is the reason for this? [Question ID = 3153]
    1. Inhibition of ATP synthase [Option ID = 12606]
    2. Lack of ADP [Option ID = 12607]

      3. --- Content provided by FirstRanker.com ---

    3. Lack of proton gradient [Option ID = 12608]
    4. Inhibition of cytochrome oxidase by the detergent [Option ID = 12609]
    Correct Answer :-
    • Lack of proton gradient [Option ID = 12608]
  66. Chemical uncoupler 2,4-dinitrophenol (DNP) uncouples electron transport to ATP synthesis by [Question ID = 3154]
    1. Creating holes in mitochondrial membrane [Option ID = 12610]

      2. --- Content provided by‌ FirstRanker.com ---

    2. Inhibiting ATP synthase [Option ID = 12611]
    3. Inhibiting electron transport [Option ID = 12612]
    4. Disrupting proton gradient [Option ID = 12613]
    Correct Answer :-
    • Disrupting proton gradient [Option ID = 12613]

    67. --- Content provided by​ FirstRanker.com ---

  67. Thylakoid membranes of chloroplasts mainly contain [Question ID = 3155]
    1. Phospholipids [Option ID = 12614]
    2. Galactolipids [Option ID = 12615]

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This post was last modified on 27 December 2020