Competitive Exams: Agriculture MCQs (Practice-Test 34 of 56)

  1. Consider the following statements: Soil is a medium for plant growth because

    1. It provides mechanical suppor and nutrients to the plants.

    2. It contains beneficial micro-ganisms.

    3. Plants cannot be grown without soil.

    Of these statements

    1. 1 alone is correct

    2. 2 and 3 are correct

    3. 1 and 3 are correct

    4. 1, 2 and 3 are correct

  2. The horizons which make up the profile of a forest soil would include

    1. A, B and C

    2. A, C and O

    3. B and O

    4. A, B, C and O

  3. The soil layer of maximum leaching is indicated by the symbol

    1. A1

    2. A2

    3. B1

    4. B2

  4. When a group of phenotypic ally similar appearing plants is selected and harvested and their seeds ar bulked, the process is known as

    1. Pedigree breeding

    2. Mass selection

    3. Bulk method of breeding

    4. Pure line selection

  5. The effect of the genotype of the pollen grain on the phenotype of the seed is termed as

    1. Apospory

    2. Pollenia

    3. End polyploidy

    4. Xenia

  6. Clistogamy encourages

    1. Self-pollination

    2. Cross pollination

    3. Apomixes

    4. Inbreeding depression

  7. Exchange of genetic material takes place between non sister chromatids of homologous chromosomes during the

    1. Four stand stage in prophase I

    2. Two strand stage in prophase I

    3. Metaphase I stage in meiosis

    4. Two strand stage in prophase II

  8. Heterosis over the better parent is called

    1. relative Heterosis

    2. Standar Heterosis

    3. Pseudoheterosis

    4. Heterobeltiosis

  9. Which of the following ar the base pairs of a DNA molecule?

    1. Adenine-thymine

    2. Cystine-adenine

    3. Adenine-uracil

    4. Thymine-adenine

      1. 1 and 4

      2. 3 and 4

      3. 1 and 2

      4. 2 and 4

  10. DNA exists as a double helix as a result of hydrogen bonding between

    1. Sugar molecules

    2. Phosphate groups

    3. Nucleohistones

    4. Nucleosides

  11. When a plant heterozygous for two given character Tt rr both of them are completely dominant, is self-llinated, the resulting progeny will consist of

    1. Six phenotypes

    2. Four phenotypes

    3. Three phenotypes

    4. Two phenotypes

  12. Sterility is most pronounced in the F1 generation following

    1. Intervarietal hybridization

    2. Intravarietal hybridization

    3. Intraspecific hybridization

    4. Interspecific hybridization

  13. Which one of the following categories of seeds is the farmer expected to buy a fresh ever time?

    1. Variety

    2. Hybrid

    3. Synthetic

    4. Composite

  14. Hybrid seeds can be produced through open pollination with the use of

    1. Inbreds

    2. Clones

    3. Pur lines

    4. Male sterile lines

  15. Sterility/incompatibility of distant crosses can be overcome to produced hybrids, by

    1. Pollen culture

    2. Anther culture

    3. Explants culture

    4. Embryo culture

  16. A three way cross in maize is defined as a cross between a single cross

    1. An open pollinated variety

    2. Synthetic

    3. An inbred line

    4. Another single cross

  17. The production of double cross hybrid in maize was first suggested by

    1. Shull

    2. East

    3. Jones

    4. Hull

  18. Which one of the following improved crop variety has been evolved through induced mutagenesis?

    1. Ir variety of rice

    2. Aruna variety of castor

    3. UP-2 variety of wheat

    4. Varuna variety of mustard

  19. The sugarcane (Saccharum officinarum 2n = 80) variety ar cytologically

    1. Autopolyploid

    2. Octoploids

    3. Segmental polyploidy

    4. Complex polyploidy

  20. A time honored sugarcane variety (wonder cane) is

    1. Co 975

    2. Co 7508

    3. Co 6907

    4. Co 419

  21. The first sunflower hybrid developed in India is

    1. MSFH-8

    2. KBSH-1

    3. APSH-

    4. BSH-1

  22. The “Sonalika” variety of wheat has dwarfing geneses derived from

    1. rhtl-

    2. Stu-1

    3. Norin-1

    4. Norin-

  23. Match List I (crops) with List II (varieties) and select the correct answer:

    List-I List-II
    1. Cotton

    2. Potato

    3. rice

    4. Wheat

    1. ratna

    2. Sujata

    3. Girija

    4. KufriSinduri

    • A
    • B
    • C
    • D
      • 4
      • 2
      • 1
      • 3
      • 2
      • 4
      • 1
      • 3
      • 4
      • 2
      • 3
      • 1
      • 2
      • 4
      • 3
      • 1
  24. Essential elements ar those

    1. Which could be replaced by other elements with similar properties

    2. Which ar required in large quantities

    3. Whose deficiency would prevent the completion of plant's life cycle

    4. Which would promote plant growth

  25. Molybdenum is required by plants because it is a cofactor for

    1. Cytochrome oxidize

    2. Nitrate reeducate

    3. Nitrite

    4. Phosphates

  26. Which of the following pair are correctly matched?

      • Die back disease
      • Of citrus
      • Manganese ‘Water core’
      • In turnip
      • Boron ‘Hear rot’
      • Of sugar beet

    Which is correct match

    1. 1, 2 and 3

    2. 1 and 3

    3. 1 and 2

    4. 2 and 3

  27. Khair disease of rice can be controlled by spraying

    1. Copper sulphate

    2. Manganese sulphate

    3. Borax

    4. Zinc sulphate

  28. Which of the following ar features of CO2 metabolism of succulent plants with CAM?

    1. Nocturnal stomatal opening

    2. Night-me transpiration

    3. Night-me CO. uptake

    4. Decrease in acidity during the night

    Select the correct answer using the codes given below:

    1. 2, 3 and 4

    2. 1, 2 and 4

    3. 1, 3 and 4

    4. 1, 2 and 3

  29. Ther is a definite relationship between the extent of accumulation of a particular metal ion and the extent of stomatal opening. The metal ion in question is

    1. Calcium

    2. Magnesium

    3. Potassium

    4. Sodium

  30. The photo synthetic pigment which occasioned and blue green algae is

    1. Chlorophyll

    2. Carotenoid

    3. Cytochrome

    4. Phycobilin