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Biotechnology Engineering

Microbiology In Biotechnology MCQs

Practice Microbiology In Biotechnology MCQs for competitive exams.

Microbiology In Biotechnology MCQs

Practice questions from this topic.

Which one of the following enzymes is encoded by human immunodeficiency virus (HIV) genome?

  1. A. Reverse transcriptase
  2. B. Phospholipase
  3. C. Phosphatase
  4. D. ATP synthase
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Phylum proteobacteria is subdivided into α, β, γ, δ and ε-proteobacteria based on

  1. A. G + C content
  2. B. 23S rRNA sequences
  3. C. tRNA sequences
  4. D. 16S rRNA sequences
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Which family of viruses has single stranded DNA?

  1. A. Herpesviridae
  2. B. Poxviridae
  3. C. Retroviridae
  4. D. Parvoviridae
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Match the organisms in Group I with the entries in Group II . Group I Group II P. Clostridium 1. Rods with teichoic acid in the cell wall Q. Escherichia 2. Rods with endospores R. Vibrio 3. Helical rods with flagella S. Bacillus 4. Rods with LPS in the outer membrane 5. Curved rods with polar flagella

  1. A. P-2, Q-4, R-5, S-1
  2. B. P-2, Q-1, R-5, S-4
  3. C. P-5, Q-4, R-2, S-3
  4. D. P-3, Q-2, R-1, S-4
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Which of the following are true for Treponema pallidum? P. It is the causative agent of syphilis Q. It is a spirochete R. It is a non-motile bacterium S. It is generally susceptible to penicillin Choose the correct combination.

  1. A. P, Q and R only
  2. B. P, Q and S only
  3. C. P, R and S only
  4. D. Q, R and S only
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Which one of the following is not a product of denitrification in Pseudomonas?

  1. A. N 2
  2. B. N 2 O
  3. C. NO 2
  4. D. NH 4 +
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Bacteria with two or more flagella at one or both ends are called

  1. A. Amphitrichous
  2. B. Peritrichous
  3. C. Lophotrichous
  4. D. Atrichous
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A microorganism isolated from a salt-rich (salt concentration ∼2 M) lake was found to possess diglycerol tetraethers, with polyisoprenoid alcohol side chains, as the major lipid component of its cell membrane. The isolated organism is

  1. A. A planctomycete
  2. B. A cyanobacteria
  3. C. A unicellular amoeba
  4. D. An archaea
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Match the antibiotics in Group I with the targets in Group II . Group I Group II P. Sulfonamide 1. Peptidoglycan synthesis Q. Quinolones 2. Peptide chain elongation R. Erythromycin 3. Folic acid biosynthesis S. Cephalosporin 4. Topoisomerase

  1. A. P-3, Q-4, R-1, S-2
  2. B. P-2, Q-4, R-3, S-1
  3. C. P-4, Q-1, R-2, S-3
  4. D. P-3, Q-4, R-2, S-1
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The typical coenzyme present in the methanogens is

  1. A. Coenzyme A
  2. B. Coenzyme Q
  3. C. Coenzyme M
  4. D. None of the above
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Match the following antibiotics in Group I with their mode of action in Group II . Group I Group II P. Chloramphenicol 1. Binds to DNA gyrase Q. Norfloxacin 2. Binds to RNA Polymerase R. Puromycin 3. Inhibits peptidyl transferase S. Rifampicin 4. Mimics aminoacyl-tRNA

  1. A. P-1, Q-3, R-2, S-4
  2. B. P-3, Q-1, R-2, S-4
  3. C. P-3, Q-1, R-4, S-2
  4. D. P-4, Q-2, R-3, S-1
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The most plausible explanation for a sudden increase of the respiratory quotient (RQ) of a microbial culture is that

  1. A. Cells are dying
  2. B. Yield of biomass is increasing
  3. C. The fermentation rate is increasing relative to respiration rate
  4. D. The maintenance rate is decreasing
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