Competitive Exams: Botany MCQs (Practice-Test 50 of 104)

  1. Abscises acid is synthesized in

    1. Chloroplasts

    2. Endoplasmic reticulum

    3. Ribosome's

    4. Peroxisomes

  2. Consider the following statements:

    1. There are as many types of tRNA as there are codons that specify amino acids

    2. Stop codons do not have tRNAs

    3. All tRNAs have an amino acid attachment site at the 3' end consisting of the sequence CCA

    Which of the statements given above is/are correct?

    1. 1 and 2

    2. 1, 2 and 3

    3. 2 and 3

    4. 3 only

  3. Which one of the following conditions favors the cross pollination in papaya?

    1. Dichogamy

    2. Herkogarny

    3. Self-sterility

    4. Unisexuality

  4. Consider the following fruit crops:

    1. Musa

    2. Malus

    3. Citrus

    4. Mangifera

    In which of the above nuclear polyembryony is known to occur commonly?

    1. 1, 2 and 3

    2. 3 only

    3. 3 and 4

    4. 1, 2 and 4

  5. Vegetative propagation in Chrysanthemum takes place by the help of

    1. Suckers

    2. Stolons

    3. Offsets

    4. Runners

  6. Which one of the following is an example of the fruit type Achene?

    1. Cherry

    2. Pineapple

    3. Mustard

    4. Sunflower

  7. Lectin of pollen is involved in

    1. Parthenogenesis

    2. Pollen sterility

    3. Pollen allergy

    4. Self-incompatibility

  8. Saprophytic self-incompatibility is common in

    1. Asteraceae

    2. Liliaceae

    3. Poaceae

    4. Solanaceae

  9. Per sperm in the seed is a

    1. Persistent endosperm

    2. Persistent nucleolus

    3. Persistent hypostases

    4. Persistent episteme

  10. Plant breeders are interested in apomixes because it

    1. Improves seed-set

    2. Improves seed-set

    3. Yields clonal progeny

    4. Shortens the life cycle

  11. Match List I (Scientists) with List II (Work related to photosynthesis) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Calvin

    2. Hill

    3. Liebig

    4. Sachs

    1. Showed that organic matter was derived from carbon dioxide and water used in photosynthesis

    2. Pointed out that the product of photosynthesis was starch

    3. Demonstrated the photolysis of water by isolated chloroplasts

    4. Traced the path of carbon in photosynthesis

    • A
    • B
    • C
    • D
      • 4
      • 1
      • 3
      • 2
      • 2
      • 1
      • 3
      • 4
      • 4
      • 3
      • 1
      • 2
      • 2
      • 3
      • 1
      • 4
  12. In which one of the following geological periods did the first land plants appear?

    1. Precambrian

    2. Permian

    3. Silurian

    4. Carboniferous

  13. What is the evolutionary process responsible for divergence and convergence of characters in closely related species?

    1. Mutation

    2. Character suppression

    3. Isolation

    4. Character displacement

  14. Match List I (Plants) with List II (Families) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Custard apple

    2. Guava

    3. Jack fruit

    4. Pineapple

    1. Annonaceae

    2. Bromeliaceae

    3. Moraceae

    4. Myrtaceae

    • A
    • B
    • C
    • D
      • 2
      • 3
      • 4
      • 1
      • 1
      • 4
      • 3
      • 2
      • 2
      • 4
      • 3
      • 1
      • 1
      • 3
      • 4
      • 2
  15. Included phloem can be defined as

    1. Phloem present within the secondary xylem

    2. Phloem present within the primary xylem

    3. Phloem present within the pith region

    4. Phloem present within the cortical region