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Microbiology (GATE - XL)

GAte

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following sulfate-reducing bacteria uses CO2 from reverse TCA cycle as a major C-Source?

  1. Archaeoglobus
  2. Desulfobacter
  3. Desulfobacterium
  4. Desulfotomaculum
  5. Thermodesulfobacterium
Question 2 Multiple Choice (Single Answer)

Which of the following microorganisms has/have least G + C moles%?

  1. Bacillus subtilis
  2. Escherichia coli
  3. Mycobacterium tuberculosis
  4. Spirillum linum
  5. Staphylococcus aureus
Question 3 Multiple Choice (Single Answer)

Which of the following enzymes are examples of hydorlases?

  1. Lactate dehydrogenase
  2. Alanine deaminase
  3. Lipase
  4. Sucrase
  5. DNA ligase
  1. 1 and 2
  2. 2 and 3
  3. 3 and 4
  4. 3 and 5
  5. 4 and 5
Question 4 Multiple Choice (Single Answer)

Assertion (A): During aerobic respiration, lesser number of ATPs is produced in eukaryotes than in prokaryotes.
Reason (R): In eukaryotes, some energy is lost when electrons are shuttled across the mitochondrial membranes that separate glycolysis (in cytoplasm) from the electron transport chain.

Directions: In the following question, there are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answers as under:

1. A and R both are correct and R is the correct explanation of A.
2. A and R both are correct and R is not the correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R both are incorrect.

  1. A and R both are correct and R is the correct explanation of A.
  2. A and R both are correct and R is not the correct explanation of A.
  3. A is correct and R is incorrect.
  4. A is incorrect and R is correct.
  5. A and R both are incorrect.
Question 5 Multiple Choice (Single Answer)

Match the column – I (Microorganism) with column – II (Industrial product) and select the correct option.

 
Column – I Column – II
P. Gluconobacter 1. Cheese
Q. Aspergillus 2. Citric Acid
R. Streptococcus 3. Vitamin C
S. Saccharomyces 4. Glycerol
  1. P - 1, Q - 2, R - 3, S - 4
  2. P - 2, Q - 1, R - 4, S - 3
  3. P - 3, Q - 2, R - 1, S - 4
  4. P - 4, Q - 2, R - 3, S - 1
  5. P - 4, Q - 3, R - 2, S - 1
Question 6 Multiple Choice (Single Answer)

Which of the following is an example of gram-positive bacteria having ability to oxidise glucose by Entner–Doudoroff pathway?

  1. Bacillus subtilis
  2. Enterococcus faecalis
  3. Escherichia coli
  4. Xanthomonas campestris
  5. Zymomonas mobilis
Question 7 Multiple Choice (Single Answer)

Which of the following statements is/are false regarding bacterial photosynthesis?

  1. Bacteriochlorophyll absorbs in the range of 650-750 nm.
  2. Water acts as photosynthetic electron donour.
  3. Non-cyclic photophosphorylation is absent.
  1. Only 1
  2. Only 2
  3. Only 3
  4. 1 and 2
  5. 2 and 3
Question 8 Multiple Choice (Single Answer)

Entner-Doudoroff pathway was first discovered by Michael Doudoroff and Nathan Entner in

  1. Azotobacter beijerinckii
  2. Enterococcus faecalis
  3. Pseudomonas saccharophila
  4. Rhizobium japonicum
  5. Zymomonas mobilis
Question 9 Multiple Choice (Single Answer)

Which of the following statements is correct about Aerotolerant anaerobes?

  1. They are completely dependent on atmospheric oxygen for growth.
  2. They are able to grow under anaerobic conditions, but develop most rapidly in an aerobic environment.
  3. They grow equally well in the presence or absence of oxygen.
  4. It does not tolerate oxygen and dies in its presence.
  5. They thrive in an environment low in oxygen.
Question 10 Multiple Choice (Single Answer)

Which of the following is/are non-protein electrons carrier molecules in electron transport chains?

  1. Flavoproteins
  2. Cytochromes
  3. Ubiquinones
  1. Only 1
  2. Only 2
  3. Only 3
  4. 1 and 2
  5. 2 and 3
Question 11 Multiple Choice (Single Answer)

Which of the following is a genus of microaerophilic bacteria?

  1. Campylobacter
  2. Bacteroides
  3. Clostridium
  4. Bacillus
  5. Escherichia
Question 12 Multiple Choice (Single Answer)

Which of the following plants would be expected to grow at refrigeration temperatures?

  1. Psychrophiles
  2. Psychrotrophs
  3. Mesophiles
  4. Thermophiles
  5. Hyperthermophiles
Question 13 Multiple Choice (Single Answer)

Which of the following statements is/are true regarding Entner–Doudoroff pathway?

  1. It is an alternate series of reactions that catabolise glucose to pyruvate.
  2. Occurs both in prokaryotes as well as eukaryotes.
  3. Has a net yield of 2 ATP for every glucose molecule metabolised.
  1. Only 1
  2. Only 2
  3. Only 3
  4. 1 and 2
  5. 2 and 3
Question 14 Multiple Choice (Single Answer)

Which of the following is a sulphate reducing bacterium?

  1. Gallionella ferruginea
  2. Desulfotomaculum carboxydivorans
  3. Rhodospirillum rubrum
  4. Beijerinckia derxii
  5. Streptococcus thermophilus
Question 15 Multiple Choice (Single Answer)

Match the column – I (Antibiotic) with column – II (Source) and select the correct option.

 
Column - I Column - II
A. Actinomycin 1. Streptomyces antibioticus
B. Chloromycin 2. Streptomyces venezuelae
C.Leucomycin 3. Streptomyces kanamyceticus
D. Tetramycin 4. Streptomyces rimosus
  1. A - 1, B - 3, C - 2, D - 4
  2. A - 3, B - 1, C - 4, D - 2
  3. A - 2, B - 1, C - 3, D - 4
  4. A - 1, B - 2, C - 4, D - 3
  5. A - 1, B - 2, C - 3, D - 4
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