Competitive Exams: Agriculture MCQs (Practice-Test 38 of 56)

  1. The phosphorus content as P in the plough layer of one hectar of soil containing 0.1% P2O5 is

    1. 430kg

    2. 860kg

    3. 1290kg

    4. 1500kg

  2. Match List I (Principal soils of India) with List II (Taxonomic soil) order and select the correct answer:

    List-I List-II
    1. Black soils of Maharashtra

    2. Laterite soils of Kerala

    3. red soils of Chotanagpur

    4. Genetic alluvial soils

    1. Alfisol

    2. Entisol

    3. Ultisol

    4. Vertisol

    • A
    • B
    • C
    • D
      • 3
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
      • 2
      • 1
      • 4
      • 3
      • 1
      • 2
  3. Match List I (Soil bacteria) with List II (Microbiological reactions) and select the correct answer:

    List-I List-II
    1. Nitrobactor

    2. Azotobacter

    3. Nitrosomonas

    4. rhizobium

    1. Symbiotic fixation of atmospheric nitrogen

    2. Non-mbiotic fixation of atmospheric nitrogen

    3. Conversion of ammonia into nitrite in soil

    4. Oxidation of nitrite to nitrate

    • A
    • B
    • C
    • D
      • 4
      • 2
      • 3
      • 1
      • 2
      • 4
      • 1
      • 3
      • 4
      • 2
      • 1
      • 3
      • 2
      • 4
      • 3
      • 1
  4. Whipil sympotom in cauliflower is due to the deficiency pf

    1. Copper

    2. Molybdenum

    3. Iron

    4. Zinc

  5. Match List I with List II and select the correct answer:

    List-I (Nutrient element) List-II (Function in the plant)
    1. Nitrogen

    2. Phosphorus

    3. Potassium

    4. Molybdenum

    1. reduction of nitrate

    2. root growth

    3. Accelerations of vegetative growth

    4. Translocation of photosynthesis

    • A
    • B
    • C
    • D
      • 3
      • 2
      • 4
      • 1
      • 4
      • 2
      • 1
      • 3
      • 4
      • 3
      • 2
      • 1
      • 3
      • 1
      • 4
      • 2
  6. ‘Crop logging’ is a method of

    1. Soil fertility evaluation

    2. Plant analysis for assessing requirement of nutrients for crop production

    3. Assessing crop damage

    4. Testing suitability of fertilizers

  7. In a compost pit, the heat of combustion of organic matter raises the temperatur when decay is occurring rapidly. During decay, the temperatur rises by

    1. 75 to 90° C

    2. 60 to 80° C

    3. 50 to 72° C

    4. 40 to 60° C

  8. Which of the following pair of rhizobium spp. And the host gener on which the rhozobium spp. Subsists, are correctly matched?

      • R leguminosorum
      • Isum
      • R Japonicum
      • Ycine
      • R Melioti
      • Dicago

    Which is correct match

    1. 1, 2 and 3

    2. 1 and 2

    3. 1 and 3

    4. 2 and 3

  9. Poor nitrification rate of non-ible mahua (Madhuca latifolia) cake is due to

    1. The presence of oil

    2. Wide C: N ratio

    3. Low nitrogen content

    4. The presence of certain alkaloids

  10. Which one of the following pair is correctly matched? Fertilizer Nutrient content

      • Urea
      • . 0 (%N)
      • Di Ammonium phosphate
      • 0 (%P)
      • Ammonium sulphate
      • . 5 (%N)
      • Muriate of potash
      • 47.5 (%K)
  11. The neutralizing values of the following liming materials ar such that

    1. CaO > Ca (OH) 2 > CaCO3 > CaMg (CO3) 2

    2. CaO > Ca (OH) 2 > CaMg (CO3) 2 > CaCO3

    3. Ca (OH) 2 > CaO> CaMg (CO3) 2 > CaCO3

    4. CaCO3 > CaO > Ca (OH) 2 > CaMg (CO3) 2

  12. The nitrogenous fertilizer of choice for tea is

    1. Calcium ammonium nitrate

    2. Urea

    3. Ammonium sulphate

    4. Ammonium nitrate

  13. Transpor of phosphate from the cytosol (pH about 7.0) into vacuoles (pH nearly 5.5) involves

    1. H2PO4 alone

    2. HPO42 alone

    3. PO43 alone

    4. H2PO4 and HPO42-

  14. The number of essential elements required for the growth of most higher plants is

    1. 3

    2. 6

    3. 8

    4. 16

  15. Consider the following symptoms:

    1. Younger leaves show signs of deficiency first.

    2. High amide and nitrate nitrogen.

    3. Effect mor pronounced on shoots when compared to roots and cruciferous plants develop narrow leaf lamina.

    4. Blockage of the synthesis of cystine, methionine etc.

    Development of the above mentioned symptoms is attributable to the deficiency of

    1. Calcium

    2. Magnesium

    3. Nitrogen

    4. Sulphur

  16. Diminished carbohydrate status of the plant placed under high nitrogen supply is due to

    1. Lower photosynthetic activity

    2. Vigorous protein synthesis

    3. Increased transpiration rate

    4. Increased vegetative growth

  17. Match List I (Symptoms) with List II (Causes) and select the correct answer:

    List-I List-II
    1. Khair disease of rice

    2. Browing of cauliflower

    3. Purple coloration of maize leaves

    4. Firing of tobacco leaves

    1. Phosphorus deficiency

    2. Molybdenum deficiency

    3. Potassium deficiency

    4. Zinc deficiency

    • A
    • B
    • C
    • D
      • 2
      • 4
      • 3
      • 1
      • 2
      • 4
      • 1
      • 3
      • 4
      • 2
      • 3
      • 1
      • 4
      • 2
      • 1
      • 3
  18. The uptake of oxygen and production of carbon dioxide in light by photosynthesizing tissue is called

    1. respiration

    2. Photorespiration

    3. Ground respiration

    4. Salt respiration

  19. The link between glycolysis and citric acid cycle is the oxidative decarboxylation reaction to form

    1. Pyruvate

    2. Acetyl CoA

    3. Oxaloacetate

    4. Citrate

  20. Indole acetic acid belongs to which one of the following groups of plant growth hormones?

    1. Gibberellins

    2. Auxins

    3. Kinins

    4. Vitamins

  21. In plants, growth rate, protein synthesis and potassium uptake ar stimulated by

    1. Cytokinins

    2. Enzymes

    3. Auxin

    4. Ethylene

  22. The growth hormone which overcomes gene tic dwarfism in certain plants and causes elongation of intact plant is

    1. Gibberellin

    2. Auxin

    3. Abscisicacid

    4. Cytokinin

  23. In maize, 2n chromosome, number = 20. The number of chromosomes in

    1. Endosper cells

    2. Pollen mother cell

    3. Pollen tube nucleus and would be respectively

    4. root-p cells

    Which of the following is correct

    1. 30 20 20 10

    2. 20 10 20 20

    3. 20 20 10 20

    4. 30 20 10 20

  24. Consider the following statements: The formation of a loop during pachytene indicates

    1. Translocation

    2. Deficiency

    3. Inversion

    4. Duplication

    Of these statements

    1. 1 and 3 are correct

    2. 2 and 4 are correct

    3. 1, 2 and 3 are correct

    4. 2, 3 and 4 are correct

  25. Genotype x Environment interaction would take place when the r is/are

    1. One genotype and two environments

    2. Two genotypes and one environment

    3. Three genotypes and one environment

    4. Two or mor genotypes and two or mor environments

  26. The situation wher an egg cell is developed into an embryo without fertilization, is described as

    1. Apomixis

    2. Parthenocarpy

    3. Sexual reproduction

    4. Parthenogenesis

  27. An anticodon is a sequence of three nitrogen bases found on

    1. DNA

    2. Messenger rNA

    3. ribosomal rNA

    4. Transfer rNA

  28. What is the correct sequence of the following during the process of mitosis?

    1. The chromosomes ar in their most condensed for having moved to the equatorial plane of the spindle

    2. The Centr mer interacts with the spindle apparatus

    3. The chromosomes consist of long threads paired along their entir length

    4. Division of the cytoplasm

    5. Sister chromatids move apar to opposite poles

    6. The nuclear membrane break down and spindle shaped structur of microtubules is organized

    Select the correct answer using the codes given below:

    1. 3, 6, 2, 1, 5, 4

    2. 3, 6, 1, 2, 5, 4

    3. 3, 2, 6, 5, 1, 4

    4. 3, 2, 6, 1, 5, 4

  29. Epitasis should be carefully distinguished from dominance which refer to nonadditively of alleles at

    1. The same locus of a homologous chromosome

    2. Different loci of a homologous chromosome

    3. The same locus of non-mologous chromosomes

    4. Different loci of non-mologous chromosomes

  30. “Mendok” is a game to cide used for inducing male sterility in

    1. Onion

    2. Sunflower

    3. Maize

    4. Cotton