MCQ on Plant Sciences

 

1. An example of a siderophore producing organism
   A. Pseudomonas fluorescens
   B. Bacillus subtilis
   C. Azospirillum lipoferum
   D. None of the above

2. In anoxygenic photosynthesis, the Green and the Purple bacteria use which of the following one as an electron source?
   A. H₂O
   B. N₂
   C. H₂S
   D. S (elemental sulphur)

3. The combustible component of biogas
   A. Carbon dioxide
   B. Methane
   C. Oxygen
   D. All the above

4. The reactions of the cell that are carried out for deriving energy are called
   A. Catabolism
   B. Metabolism
   C. Anabolism
   D. Activation energy

5. The following type of mycorrhizae form visible hyphal mantle on the root surface
   A. Ericoid mycorrhizae
   B. VA mycorrhizae
   C. Ectomycorrhizae
   D. None of the above

6. When acetate is the sole source of carbon for some microorganisms, the cycle which is used is called
   A. Pentose phosphate pathway
   B. Glycolytic pathway
   C. Glyoxylate pathway
   D. Oxaloacetate pathway

7. An example of a pigment producing yeast genus
   A. Rhodotorula
   B. Torulopsis
   C. Saccharomyces
   D. Candida

8. Entner–Doudoroff pathway is found in
   A. Aerobic prokaryotes
   B. Anaerobic prokaryotes
   C. Both (a) and (b)
   D. Aerobic eukaryotes

9. The following product is an example of a distilled alcoholic beverage
   A. Wine
   B. Beer
   C. Whisky
   D. All of the above

10. A 40× objective and 10× ocular produce a total magnification of
    A. 50
    B. 100
    C. 90
    D. 200

11. A metabolic process in which organic compounds serve as both electron donors and electron acceptors
    A. Fermentation
    B. Respiration
    C. Mineralization
    D. None of these

12. A transmission electron microscope uses this in place of a glass lens
    A. Electron gun
    B. Mirror
    C. Photon
    D. Magnet

13. HEPA filter is used in which of the following equipments?
    A. Autoclave
    B. Hot air oven
    C. Laminar Air Flow
    D. None of the above

14. The term used for acquisition of naked DNA from its environment and its incorporation into their genome by a bacterium is
    A. Transformation
    B. Lysogenic conversion
    C. Conjugation
    D. Transduction

15. Soil microbiologist who discovered the antibiotic streptomycin
    A. A. B. Frank
    B. Alexander Fleming
    C. Winogradsky
    D. S. A. Waksman