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
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2. Which virus was first observed?
- Hepatitis Virus
- TMV
- Cauliflower mossaic virus
- None of these
[expand title=”Show Answer”]Answer: TMV
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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
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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
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5. Cell cycle regulated by
- Cyclins
- Cdks
- Cyclins and Cd ks
- None of these
[expand title=”Show Answer”]Answer: Cyclins and Cd ks
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6. The proteinaceous compound are converted to ammonia by
- Putrification bacteria
- Ammonifiaction bacteria
- Nitrification bacteria
- Denitrifying bacteria
[expand title=”Show Answer”]Answer: Ammonifiaction bacteria
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7. A cell becomes flaccid when placed in a
- Isotonic solution
- Hypertonic solution
- Hypotonic solution
- Normal solution
[expand title=”Show Answer”]Answer: Hypertonic solution
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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
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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
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10. Important class of respiratory enzymes:
- NAD
- Cytochromes
- ATPase
- Hydrolases
[expand title=”Show Answer”]Answer: Cytochromes
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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
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12. Genetic constitution of the cell is
- Phenotype
- Genotype
- Cryptotype
- Histotype
[expand title=”Show Answer”]Answer: Genotype
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13. The primary mode of transmission of poliomyelitis is
- Oral route
- Blood
- Milk
- Person to person
[expand title=”Show Answer”]Answer: Milk
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14. Cerebral malaria is caused by
- Plasmodium vivox
- P.ovale
- P.falsiparum
- P.malaria
[expand title=”Show Answer”]Answer: P.falsiparum
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15. Ergot disease is caused by
- Puccinia
- Rhizopus
- Claveceps
- Penicillium
[expand title=”Show Answer”]Answer: Claveceps
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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
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17. Which of these is a trace element for bacteria?
- Mg+2
- Na+
- Ca+2
- Mn+2
[expand title=”Show Answer”]Answer: Na+
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18. Virulent factor in pneumococcus is
- Cell wall
- Capsule
- Mesosomes
- Emdotoxins
[expand title=”Show Answer”]Answer: Emdotoxins
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19. The Bacteria move in response to magnetic field is
- Spirochets
- Treponema
- Aquaspirillum Magnetotacticum
- None of these
[expand title=”Show Answer”]Answer: Aquaspirillum Magnetotacticum
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20. Nagler reaction detect
- Corynebacterium diphtheriae
- Clostridium tetani
- Clostridium perfringens
- Clostridium botulinum
[expand title=”Show Answer”]Answer: Clostridium perfringens
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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
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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
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23. Mycotoxins are produced by
- Bacteria
- Fungi
- Algae
- Protozoans
[expand title=”Show Answer”]Answer: Fungi
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