Microbiology, Mycology and Plant Pathology

JKPSC Assistant Professor (Botany) · Botany · 70 practice questions with answers and explanations: 4 Easy, 66 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Bacteria that fix atmospheric nitrogen in the root nodules of legumes are:

  1. Rhizobium
  2. Clostridium
  3. Azotobacter
  4. Nitrosomonas
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Answer: A. A symbiotic bacterium.

Sample Easy question 2

The disease caused by a virus in plants is:

  1. Rust
  2. Smut
  3. Tobacco mosaic disease
  4. Blight
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Answer: C. Caused by TMV.

Sample Easy question 3

Gram-positive bacteria have a cell wall rich in:

  1. Peptidoglycan
  2. Cellulose
  3. Chitin
  4. Lipopolysaccharide
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Answer: A. The thick layer retains the crystal violet stain.

Sample Medium question 4

Generalised transduction was discovered by:

  1. Zinder and Lederberg
  2. Griffith
  3. Meselson
  4. Avery
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Answer: A. It used phage P22 in Salmonella.

Sample Medium question 5

Cyanobacteria fix atmospheric nitrogen in specialised cells called:

  1. Akinetes
  2. Gas vacuoles
  3. Heterocysts
  4. Hormogonia
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Answer: C. Nostoc is an example.

Sample Medium question 6

The use of microbes to clean up pollutants is called:

  1. Biocontrol
  2. Bioremediation
  3. Biofortification
  4. Biosorption
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Answer: B. Pseudomonas is used for oil spills.

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