Competitive Exams: Botany MCQs (Practice-Test 33 of 104)

  1. Consider the following statements:

    1. In climacteric fruits, ethylene stimulates its own production

    2. Gibberellin present in a healthy stem causes some of the new cells to differentiate as phloem.

    3. Loss of turgor in leaves stimulates the production of abscises acid.

    Which of the statements given above are correct?

    1. 1 and 2 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  2. Which one of the following activities cambium and elicits differentiation of xylem?

    1. Abscisic acid

    2. Auxin

    3. Cytokinin

    4. Ethylene

  3. Which one of the following is a synthetic cytokinin?

    1. Ethylene-diaminetetraacetic acid

    2. Carboboenzoxyglylalanine

    3. 6-furfurylaminopurine

    4. 2, 4 − 5 trichlorophenoxypropionic acid

  4. Consider the following statements:

    1. In the roots with endomycorrhizal association, the fungal hyphae penetrate the root cortex and pass through the casparian strip to enter vascular tissue.

    2. The globin part of leghemoglobin in nitrogen-fixing root nodules is encoded by the bacterium whereas heme group is synthesized by the host plant.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  5. Which one of the following pairs is not correctly matched?

      • Acidic amino acid
      • Aspartic acid
      • Basic amino acid
      • Lysine
      • Non-polar aromatic amino acid
      • Tryptophan
      • Charged polar amino acid
      • Leucine
  6. Consider the following statements:

    1. Beta-oxidation takes place only in glyoxisomes and not in cytosol.

    2. When fatty acids undergo betaoxidation to form acetyl coA, only

    NADH is produced and not FADH2

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  7. Banana propagates vegetative through

    1. Rhibosomes

    2. Runners

    3. Suckers

    4. Tubers

  8. With reference to the pioneering work done on the plants listed below match List I (Plants) with List II (Phenomena) and select the correct answer using the codes given below the lists:

    List-I (Plants) List-II (Phenomena)
    1. Sinapis alba

    2. Barely roots

    3. Mougetia

    4. Arabidopsis

    1. Phototropism

    2. Tanda effect

    3. Control of gene expression by phytochrome

    4. Chloroplast movement

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 4
      • 3
      • 1
      • 4
      • 2
      • 3
      • 3
      • 2
      • 4
      • 1
      • 3
      • 4
      • 2
      • 1
  9. Consider the following statements:

    1. Bamboos produce new plants vegetatively through their rhizomes.

    2. Strawberries can reproduce asexually by runners.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  10. The intine of pollen is mad up of

    1. Callose

    2. Chitin

    3. Cellulose

    4. Sporopollenin

  11. Which of the following is a characteristic of sorosis?

    1. Development from a spike or spadix

    2. Muti-seeded fruit developed from a monocarpellary pistil

    3. Edible bracts

    4. True fruit surrounded by fleshy edible thalamus

  12. The pollination between two flowers on different plants is known as:

    1. Xenogamy

    2. Getionogamy

    3. Cleistogamy

    4. Dichogamy

  13. Which part of the plant is involved in the vegetative propagation of Dalbergia sissoo?

    1. Flower bud

    2. Stem cutting

    3. Intact root

    4. Margin of intact leaf

  14. With reference to litho sere (Xerosere) type of plant succession, match List I (Organism) with List II (Stage of succession) and select the correct answer using the codes given below the lists:

    List-I (Organism) List-II (Stage of succession)
    1. Aristida

    2. Parmelia

    3. Polytrichum

    4. Rhizocarpon

    1. Crustose lichen stage

    2. Foliose lichen stage

    3. Moss stage

    4. Herb stage

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 1
      • 3
      • 2
      • 4
      • 4
      • 2
      • 3
      • 1
      • 4
      • 3
      • 2
      • 1
  15. Who of the following is associated with the description of life-forms in plant communities?

    1. Tansley

    2. Shelford

    3. Slobodkin

    4. Raunkiaer