MCQ on General Characteristics of Microorganisms

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Biology MCQ – MCQ on General Characteristics of Microorganisms

1. When a bacterial cell and mitochondria are treated with cyanide and carbon monoxide what happens initially?

  • Respiration inhibits
  • Photosynthesis inhibits
  • Protein synthesis inhibits
  • No effect occurs

[expand title=”Show Answer”]Answer: Respiration inhibits


2. Which virus was first observed?

  • Hepatitis Virus
  • TMV
  • Cauliflower mossaic virus
  • None of these

[expand title=”Show Answer”]Answer: TMV

3. The most important energy-yielding reaction for an aerobic organism is

  • Glycosis
  • EMP
  • KDPG
  • Both b and c

[expand title=”Show Answer”]Answer: Both b and c

4. A disease that can be transmitted by an infectious agent from one individual to another was called

  • Epidemic
  • Pandemic
  • Communicable
  • Comma

[expand title=”Show Answer”]Answer: Communicable

5. Cell cycle regulated by

  • Cyclins
  • Cdks
  • Cyclins and Cd ks
  • None of these

[expand title=”Show Answer”]Answer: Cyclins and Cd ks

6. The proteinaceous compound are converted to ammonia by

  • Putrification bacteria
  • Ammonifiaction bacteria
  • Nitrification bacteria
  • Denitrifying bacteria

[expand title=”Show Answer”]Answer: Ammonifiaction bacteria

7. A cell becomes flaccid when placed in a

  • Isotonic solution
  • Hypertonic solution
  • Hypotonic solution
  • Normal solution

[expand title=”Show Answer”]Answer: Hypertonic solution

8. A mutation causing a substitution of one amino acid is called

  • Point mutation
  • Silent mutation
  • Missence mutation
  • None of these

[expand title=”Show Answer”]Answer: Missence mutation

9. The formation spindle fibres in the process of cell division is prevented by

  • Corchicine
  • ATP
  • Hydrazine
  • All of these

[expand title=”Show Answer”]Answer: Hydrazine

10. Important class of respiratory enzymes:

  • NAD
  • Cytochromes
  • ATPase
  • Hydrolases

[expand title=”Show Answer”]Answer: Cytochromes

11. The primary mode of transmission of poliomyelitis virus:

  • Flies
  • Milk
  • Person to person
  • Food and water

[expand title=”Show Answer”]Answer: Food and water

12. Genetic constitution of the cell is

  • Phenotype
  • Genotype
  • Cryptotype
  • Histotype

[expand title=”Show Answer”]Answer: Genotype

13. The primary mode of transmission of poliomyelitis is

  • Oral route
  • Blood
  • Milk
  • Person to person

[expand title=”Show Answer”]Answer: Milk

14. Cerebral malaria is caused by

  • Plasmodium vivox
  • P.ovale
  • P.falsiparum
  • P.malaria

[expand title=”Show Answer”]Answer: P.falsiparum

15. Ergot disease is caused by

  • Puccinia
  • Rhizopus
  • Claveceps
  • Penicillium

[expand title=”Show Answer”]Answer: Claveceps

16. Most bacteria require vitamins as

  • Growth Factors
  • Sources of energy
  • Sources of carbon
  • Sources of electron donars

[expand title=”Show Answer”]Answer: Growth Factors

17. Which of these is a trace element for bacteria?

  • Mg+2
  • Na+
  • Ca+2
  • Mn+2

[expand title=”Show Answer”]Answer: Na+

18. Virulent factor in pneumococcus is

  • Cell wall
  • Capsule
  • Mesosomes
  • Emdotoxins

[expand title=”Show Answer”]Answer: Emdotoxins

19. The Bacteria move in response to magnetic field is

  • Spirochets
  • Treponema
  • Aquaspirillum Magnetotacticum
  • None of these

[expand title=”Show Answer”]Answer: Aquaspirillum Magnetotacticum

20. Nagler reaction detect

  • Corynebacterium diphtheriae
  • Clostridium tetani
  • Clostridium perfringens
  • Clostridium botulinum

[expand title=”Show Answer”]Answer: Clostridium perfringens

21. The following organisms lack definite cell wall

  • Mycoplasma
  • L-forms
  • Both a and b
  • Bacteria

[expand title=”Show Answer”]Answer: Both a and b

22. The following disease are caused by Mycoplasma except

  • Pneumonia in human beings
  • Little leaf of Brinjal
  • Dwarf disease of Mulbery
  • Citrus canker

[expand title=”Show Answer”]Answer: Citrus canker

23. Mycotoxins are produced by

  • Bacteria
  • Fungi
  • Algae
  • Protozoans

[expand title=”Show Answer”]Answer: Fungi

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