Competitive Exams: Botany MCQs (Practice-Test 11 of 104)

  1. Golden rice is a transgenic crop with a trait for

    1. Pest resistance

    2. High vitamin a content

    3. Drought resistance

    4. High protein content

  2. In which one of the following combinations, the compounds are arranged in ascending order based on their molecular weights?

    1. DNA, RNA, AMP, ADP, ATP

    2. DNA, RNA, ATP ADP AMP

    3. AMP ADP ATP RNA, DNA

    4. AMP ATP ADP DNA, RNA

  3. The strongest evidence for DNA being the genetic material is deduced from

    1. The fact that DNA is present not only in the nucleus but also in mitochondria and plastids

    2. The situation that chromosomes are made up of DNA

    3. The researches involving transformation experiments in the bacterial cells

    4. The reality that DNA has the potentiality to replicate

  4. Match List I (Phenomenon) with List II (Effects/States) and select the correct answer:

    List-I List-II
    1. Crossing over

    2. Coupling

    3. Coincidence

    4. Repulsion

    1. Cis-configuration

    2. Trans-configuration

    3. Recombination

    4. Double cross-over

    • A
    • B
    • C
    • D
      • 3
      • 1
      • 4
      • 2
      • 4
      • 3
      • 1
      • 2
      • 2
      • 1
      • 4
      • 3
      • 3
      • 4
      • 2
      • 1
  5. In a particular plant, genes for tall (T) plan and red (R) flowers are dominant over dwarf (t) plant and white (r) flowers. When a dithered of F1 was test crossed. It produced following progenies:

    • Tall and Red-44
    • Tall and White-5
    • Dwarf and Red-7
    • Dwarf and White-44

    What would be the distance between genes t and r on the basis of the data given above?

    1. 44 map units

    2. 5 map units

    3. 7 map units

    4. 12 map units

  6. The main difference between luxuriance and heterocyst is that luxuriance is

    1. An environmental phenomenon while heterocyst is a genetic phenomenon

    2. Observed in self-pollinating species while heterocyst is obverted in crosspollinating species

    3. An evolutionary accident brought about by complementary action of genes while heterosis is an expression of superior adaptation

    4. Related to sterility while heterocyst is related fertility

  7. Which one of the following pairs is NOT correctly matched?

      • Inbreeding depression
      • Homozygosity
      • Hybrid vigour
      • Heterozygosity
      • Apogamy
      • Fertilization
      • Male sterility
      • Cross-pollination
  8. Consider the following statements: Apomixis is phenomenon in which

    1. Fertilization occurs regularly

    2. Fertilization does not occur at all

    3. Embryo is formed directly from an egg or male gamete

    4. Formed embryo may be haploid or diploid

    Which of the above statements is/are correct?

    1. 1 alone

    2. 1 and 3

    3. 1, 2 and 3

    4. 2, 3 arid 4

  9. The most commonly used growth regulator to induce somatic embryogeriesis is

    1. BAP

    2. 2, 4 − D

    3. IAA

    4. GA3

  10. Which one of the following pairs is NOT correctly matched?

      • Early blight of potato
      • Aalternaria solani
      • Brown rot of potato
      • Pseudomonas solanacerarum
      • Leaf spot of potato
      • Cercospora concurs
      • Ring rot of potato
      • Phytophtora infestans
  11. The species of Tilletia responsible for hill bunt or stinking smut of wheat are

    1. Tilletia caries and T. Foetida

    2. Tilletia caries and T. Barclayana

    3. Tilletia caries and T. Foetida

    4. Tilletia contraversa and T. Caries

  12. The foul fishy smell of a volatile chemical trimethylamine in the disease-infested wheat field is an indicator of

    1. Rust

    2. Smut

    3. Blast

    4. Bunt

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

    List-I List-II
    1. Trichoderma

    2. Systemic fungicide

    3. Phyllosphere

    4. False smut

    1. Bavistin

    2. Microorganisms inhabiting leaf surface

    3. Ustilaginoidea vireos

    4. Mycoparasitism

    • A
    • B
    • C
    • D
      • 3
      • 1
      • 2
      • 4
      • 1
      • 2
      • 4
      • 3
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 3
      • 1
  14. The main plant exported from Andhra Pradesh Is

    1. Oryza sativa

    2. Coffea arabica

    3. Nicotiana

    4. tabacum

    5. Cocos nuciefera

  15. Match List I (Use) with List II (Name of the plant) and select the correct answer:

    List-I List-II
    1. Fibre

    2. Oil

    3. Drug

    4. Timber

    1. Swietenia macrophylla

    2. Arachis hypogaea

    3. Corchorus capsularis

    4. Taxus baccata

    • A
    • B
    • C
    • D
      • 2
      • 4
      • 3
      • 1
      • 3
      • 2
      • 1
      • 4
      • 3
      • 2
      • 4
      • 1
      • 2
      • 1
      • 4
      • 3
  16. Which one of the following pairs is correctly matched?

      • Tannia
      • Bixa orellana
      • Annatto
      • Cassia auriculata
      • Indigo
      • Indigofei caerulea
      • Cochineal dye
      • Dactypius coccus