Competitive Exams: Botany MCQs (Practice-Test 90 of 104)

  1. In which one of the following fossil types are the tissues best preserved?

    1. Compression

    2. Impression

    3. Petrifaction

    4. Cast

  2. Heteroblastic development is a characteristic feature of

    1. Submerged aquatic plants

    2. Free-floating aquatic plants

    3. Emergent aquatic plants

    4. All aquatic plants

  3. The food reservoir ‘mannitol’ is found in

    1. Rhodophyceae

    2. Phaeophyceae

    3. Cyanophyceae

    4. Xanthophyceae

  4. Which one of the following lichens is used in cosmetics?

    1. Ochrolechia

    2. Roccella

    3. Ramalina

    4. Parmelia

  5. A temperate bacteriophage

    1. Causes complete bursting of the infected bacterial cell after the latent period

    2. Does not cause bursting of the infected bacterial cell after the latent period

    3. Does not cause the death of the infected bacterial cell but continues to exist there and this cell divides almost like a normal cell

    4. Does not cause the death of the infected bacterial cell but the infected cell ceases to divide

  6. Consider the following statements about vesicular arbuscular mycorrhizae:

    1. They are phycomycetous endomycorrhizae.

    2. Their inoculations increase production in several crops.

    3. They are absent in rice fields which are flooded with water.

    Of these statements

    1. 1, 2 and 3 are correct

    2. 1 and 2 are correct

    3. 2 and 3 are correct

    4. 1 and 3 are correct

  7. Consider the following statements about retrovirus

    1. It has an enzymes located in its cost.

    2. In it, the newly formed DNA becomes a part of the host cells chromosome

    3. It has a double-stranded DNA.

    4. Some of these are highly oncogenic.

    Of these statements

    1. 2, 3 and 4 are correct

    2. 1, 3 and 4 are correct

    3. 1, 2 and 4 are correct

    4. 1, 2 and 3 are correct

  8. A bacterial cell contains

    1. Mesosome, Golgi bodies and nucleoid

    2. Mesosome and Golgi bodies

    3. Mesosome and nucleoid

    4. Golgi bodies and nucleoid

  9. Consider the following statements: Mosses differ from liverworts in that their rhizoids are

    1. Brown

    2. Multicellular

    3. Obliquely spate.

    4. Unbranched.

    Of these statements

    1. 2, 3 and 4 are correct

    2. 1, 2 and 4 are correct

    3. 1, 3 and 4 are correct

    4. 1, 2 and 3 are correct

  10. Which of the following pairs are correctly matched?

      • Tent-pole
      • Ginkgo
      • Pavement tissus
      • Welwitschia
      • Massula
      • Azolla
      • Prismatic tissue
      • Isoetes

    Select the correct answer from the codes given below:

    1. 1, 2 and 3

    2. 1, 3 and 4

    3. 1, 2 and 4

    4. 2, 3 and 4

  11. The most completely fossil Bryophyte is

    1. Hepaticites

    2. Sphagnum

    3. Muscites

    4. Naiadita

  12. Match List I (Orders of Bryophyte) with List II (Characters present) are select the correct answer:

    List-I List-II
    1. Marchantiales

    2. Leafy Jungerm-anniales

    3. Anthocerotales

    4. Funerals

    1. Neck of arch gonium composed of five vertical rows of cells

    2. Absence of elaters in capsule

    3. Archesporium arises from amphithecia

    4. Presence of scales on thralls

    • A
    • B
    • C
    • D
      • 4
      • 1
      • 3
      • 2
      • 1
      • 4
      • 3
      • 2
      • 4
      • 1
      • 2
      • 3
      • 1
      • 4
      • 2
      • 3
  13. Consider the following pigments:

    1. Chlorophyll a

    2. Chlorophyll b

    3. 3. Chlorophyll c

    4. Carotenes

    5. Biliproteins

    6. Xanthophylls

    The characteristic photosynthetic pigments present in chlorophyceae would include

    1. 1, 2, 3 and 4

    2. 1, 3, 4 and 5

    3. 2, 3, 5 and 6

    4. 1, 2, 4 and 6

  14. Gnetum resembles angiosperms in showing which one of the following types of female gametophyte development?

    1. Monophonic

    2. Bishopric

    3. Endymion

    4. Tetrasporic

  15. Which of the following photosynthetic characteristics are present in C3 plants but not in C4 plants?

    1. CO2 compensation point of 45 ppm

    2. Relatively higher rate of photo respiratory CO2 evolution

    3. Presence of well developed bundle sheath

    4. Initial involvement of RuBP carboxyl's (RuBis CO) in CO2 assimilation

    Select the correct answer using the codes given below:

    1. 1, 2 and 3

    2. 1, 2 and 4

    3. 1, 3 and 4

    4. 2 and 4