Competitive Exams: Botany MCQs (Practice-Test 45 of 104)

  1. Match List I with List II and select the correct answer axing the codes given below:

    List-I List-II
    1. Hofmeister

    2. Amici

    3. Strasburger

    4. Nawaschin

    1. Double fertilization

    2. Alternation of generations in plants

    3. Plants have sex

    4. Chromosomal changes during alternation of generations

    5. Discovery of pollen tube

    • A
    • B
    • C
    • D
      • 1
      • 4
      • 2
      • 3
      • 2
      • 5
      • 4
      • 1
      • 4
      • 1
      • 2
      • 3
      • 3
      • 5
      • 2
      • 4
  2. Consider the following processes:

    1. Heterorkaryon Formation

    2. Diploidization of nuclei

    3. Restoration of diploid nuclei to their haploid state (haploidization)

    Pansexual cycle in fungi involves

    1. 1 and 2

    2. 1 and 3

    3. 2 and 3

    4. 1, 2 and 3

  3. Which of the following pairs are correctly matched? Plant Organ or Reproduction

      • Oscillatona
      • Homogony
      • Nostoc
      • Aconites
      • Streptomyces
      • Conidia
      • Albugo
      • Zoospore

    Select the correct answer from the codes given below:

    Codes:

    1. 1, 2 and 3

    2. 1, 2, 3 and 4

    3. 1, 3 and 4

    4. 2 and 4

  4. In Bryophyte, the term amphigastria refers to

    1. Penchaetical leaf

    2. Peritoneal leaf

    3. Ventral leaf

    4. Scale leaf

  5. Transduction is a process which requires

    1. The incorporation of genetic material from dead bacterial cells into the genetic make up of living bacterial cell

    2. The transfer of genetic material from one bacterial cell to another via a temperate virus particle

    3. Cell to cell contact between donor and recipient by the formation of a conjugation canal between two living bacterial cells

    4. The incorporation of genetic material between two lysed bacterial cells

  6. The earliest undoubted vascular plants are found in the rocks of

    1. Early Cambrian

    2. Early Devonian

    3. Mid-creataceous

    4. Not until the beginning of Quaternary

  7. Match List I with List II and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Peripheral reticulum

    2. Ru BP-Carboxylase-Oxygenase

    3. CO2 fixation in the dark

    4. Cyclic photo-Phosphorylation

    1. C2-Plants

    2. CAM-Plants

    3. Photo system I

    4. C4-Plants

    5. Photo system II

    • A
    • B
    • C
    • D
      • 1
      • 4
      • 2
      • 3
      • 2
      • 5
      • 4
      • 1
      • 4
      • 1
      • 2
      • 3
      • 3
      • 5
      • 1
      • 4
  8. Match List I with List II and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Conversion of glucose to Pyruvate

    2. conversion of Pyruvate to acetyl Co-A

    3. Break down of acetyl-Co-A to yield reduced Co-enzymes

    4. Synthesis of ATP

    1. N/A

    2. N/A

    3. N/A

    4. N/A

    • A
    • B
    • C
    • D
      • 3
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
      • 2
      • 1
      • 3
      • 1
      • 4
      • 2
  9. The very first step in the formation of acetyl Co-A is the

    1. Formation of a complex between thiamine pyrophosphate and Pyruvate

    2. Release of the acetyl group from lipoid acid to Co-A

    3. Decarboxylation of Pyruvate

    4. Transfer of electrons from reduced lipoid acid to NAD

  10. The glyoxylate cycle is a modification of

    1. TCA cycle

    2. Calvin cycle

    3. Oxidative Pentose Phosphate Pathway

    4. Gyroplane Pathway

  11. Match List I with List II and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Chloride

    2. Zinc

    3. Boron

    1. Essential for the biosynthesis of insole 3 acetic acid

    2. Enzyme activator for Photolysis

    3. Necessary for translocation of sugars

    • A
    • B
    • C
      • 1
      • 2
      • 3
      • 2
      • 1
      • 3
      • 2
      • 3
      • 1
      • 3
      • 1
      • 2
  12. Active transport of ions through cell membranes is brought about by

    1. Simple diffusion

    2. Ion exchange

    3. Carrier molecules

    4. Donnan equilibrium

  13. Which one of the following enzymes requires molly's denum as the co-factor?

    1. Carboxylase

    2. Hecokinase

    3. Flavin oxidase

    4. Nitrate reeducates

  14. Eukaryotic m-RNA's are associated with proteins to form RNP complexes. Some of the complexes may remain in the cytoplasm for a long time before being genetically expressed. Such complexes are known as

    1. Ribosomes

    2. Polyribosomes

    3. Rnp fibres

    4. Informosomes

  15. If one chain of a DNP molecule has the base order 5 ‘ATTGACGT 3’ … Then the base order of its complementary chain will be

    1. 3 ‘ATTGACGT 5’

    2. 5 ‘TGCAGTTA 3’

    3. 5 ‘TUUCTGCU 3’

    4. 3 ‘TAACTGCA 5’