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Microbiology (GATE)

Description: Microbiology Biology Life Sciences Biotechnology Bacteria Virus Fungi GATE CSIR NET Microbiology
Number of Questions: 15
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Tags: Microbiology Biology Life Sciences Biotechnology Bacteria Virus Fungi GATE CSIR NET
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Which of the following are foodborne diseases?

  1. Botulism
  2. Influenza
  3. Listeriosis
  4. Tuberculosis

  1. 1 and 2

  2. 1 and 3

  3. 1 and 4

  4. 2 and 3

  5. 2 and 4

Show answer
Correct Option: B
Explanation:

It is correct. 

Which of the following statements are false?

  1. Peptidoglycan is found in the bacterial cell wall.
  2. Cyanobacteria have a gram-positive cell wall.
  3. The cell wall of gram-positive bacteria is thinner than that of gram-negative bacteria.
  4. Peptidoglycan is also known as murein.

  1. 1 and 2

  2. 1 and 4

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4

Show answer
Correct Option: C
Explanation:

Correct answer

Which of the following diseases are caused by prions?

  1. Kuru disease
  2. Mad cow disease
  3. African sleeping sickness
  4. Syphilis

  1. 1 and 2

  2. 1 and 4

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4

Show answer
Correct Option: A
Explanation:

Kuru disease is an extremely rare and fatal nervous system disease. 

Which of the following are examples of culture media for fungi?

  1. Mannitol salt agar
  2. Czapek dox agar
  3. Sabouraud agar
  4. Potato dextrose agar
  5. Eosin methylene blue agar

  1. 1, 2 and 3

  2. 1, 3 and 5

  3. 2, 3 and 4

  4. 2, 4 and 5

  5. 3, 4 and 5

Show answer
Correct Option: C
Explanation:

Correct answer

Which of the following is a culture medium for Neisseria?

  1. Eaton's agar

  2. Thayer-Martin agar

  3. Bismuth sulphite agar

  4. Bordet-Gengou agar

  5. Löwenstein-Jensen medium

Show answer
Correct Option: B
Explanation:

Thayer-Martin agar, a Mueller-Hinton agar with 5% chocolate sheep blood and antibiotics, is used for culturing and primarily isolating pathogenic Neisseria bacteria.

Which of the following is an example of non-selective media?

  1. Chocolate agar

  2. Hektoen enteric agar

  3. Hoyle's agar

  4. Xylose lysine deoxycholate agar

  5. MacConkey agar

Show answer
Correct Option: A
Explanation:

Chocolate agar or chocolate blood agar is a non-selective, enriched growth medium used for isolation of pathogenic bacteria.

Which of the following are examples of selective media?

  1. VRBD agar
  2. MSA agar
  3. BCYE agar
  4. PCA agar
  5. Nutrient agar

  1. 1, 2 and 3

  2. 1, 3 and 5

  3. 2, 3 and 4

  4. 2, 4 and 5

  5. 3, 4 and 5

Show answer
Correct Option: A
Explanation:

It is the correct answer. 

Which of the following is/are double-stranded RNA containing viruses?

  1. Adenovirus
  2. Rhabdovirus
  3. Reovirus

  1. Only 1

  2. Only 2

  3. Only 3

  4. Both 1 and 2

  5. Both 2 and 3

Show answer
Correct Option: C
Explanation:

It is the correct answer. 

Which of the following is a family of double-stranded DNA viruses that infect bacteria and archea?

  1. Ascoviridae

  2. Tectiviridae

  3. Poxviridae

  4. Bidnaviridae

  5. Phycodnaviridae

Show answer
Correct Option: B
Explanation:

Tectiviridae is a family of double-stranded DNA viruses that infect bacteria and archea.

_______ is not a RNA virus.

  1. Rotavirus

  2. Cypovirus

  3. Parvovirus

  4. Rhinovirus

  5. Picornavirus

Show answer
Correct Option: C
Explanation:

Parvoviruses are linear, non-segmented single-stranded DNA viruses.

Which of the following diseases is caused by positive-sense single-stranded RNA virus?

  1. Hepatitis C
  2. Chikungunya
  3. Measles
  4. Polio

  1. Only 1, 2 and 3

  2. Only 1, 2 and 4

  3. Only 1, 3 and 4

  4. Only 2, 3 and 4

  5. All of these

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer. 

Match the following:

 
Column I
Column II
P. Staphylococcus aureus 1. Gram-negative rod-shaped bacteria
Q. Listeria monocytogenes 2. Gram-negative spiral bacteria
R. Bordetella pertussis 3. Gram-positive coccus-shaped bacteria
S. Treponema pallidum 4. Gram-positive rod-shaped bacteria

  1. P - 1, Q - 2, R - 3, S - 4

  2. P - 2, Q - 1, R - 4, S - 3

  3. P - 2, Q - 3, R - 4, S - 1

  4. P - 3, Q - 4, R - 1, S - 2

  5. P - 4, Q - 3, R - 2, S - 1

Show answer
Correct Option: D
Explanation:

This is the correct answer.

Which of the following is a fungus used as biological insecticide?

  1. Beauveria bassiana

  2. Bacillus thuringiensis

  3. Penicillium camemberti

  4. Monascus purpureus

  5. Acremonium chrysogenum

Show answer
Correct Option: A
Explanation:

Beauveria bassiana is a fungus that grows naturally in soils throughout the world.

Match the following:

 
Column I
Column II
P. Transcription 1. Genetic information transfer from DNA to RNA
Q. Transduction 2. DNA transfer from one bacterium to another through phages
R. Translation 3. Decoding of genetic code carried by mRNA to produce proteins

  1. P - 1, Q - 2, R - 3

  2. P - 1, Q - 3, R - 2

  3. P - 2, Q - 1, R - 3

  4. P - 3, Q - 1, R - 2

  5. P - 3, Q - 2, R - 1

Show answer
Correct Option: A
Explanation:

It is correct.

Which of the following diseases are caused by bacteria?

  1. Scarlet fever
  2. Yellow fever
  3. Typhoid fever
  4. Valley fever

  1. 1 and 2

  2. 1 and 3

  3. 1 and 4

  4. 2 and 3

  5. 2 and 4

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer. 

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