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MCQs

Total Questions : 82 | Page 2 of 9 pages
Question 11. The main difference between a self-transmissible and a mobilizable plasmid is that the self-transmissible plasmid
  1.    usually has a transposon inserted into it
  2.    transfers antibiotic resistance genes
  3.    transfers both strands of the plasmid DNA
  4.    carries genes encoding the mating apparatus
 Discuss Question
Answer: Option D. -> carries genes encoding the mating apparatus
Question 12. Which type of plasmid can exist with or without being integrated into the host's chromosome?
  1.    Lysogen
  2.    Medisome
  3.    Episome
  4.    Lisosome
 Discuss Question
Answer: Option C. -> Episome
Question 13. The transposase gene encodes an enzyme that facilitate
  1.    viral replication within a genome
  2.    general recombination
  3.    None of these
  4.    site-specific integration of transposable elements
 Discuss Question
Answer: Option D. -> site-specific integration of transposable elements
Question 14. The term used for plasmids possessing both RTF and r determinants is
  1.    None of these
  2.    non self-transmissible plasmids
  3.    non conjugative plasmids
  4.    conjugative plasmids
 Discuss Question
Answer: Option D. -> conjugative plasmids
Question 15. Which of the following is the cause for drug resistance in tuberculosis?
  1.    Mutation
  2.    Transformation
  3.    Transduction
  4.    Conjugation
 Discuss Question
Answer: Option A. -> Mutation
Question 16. Which of the following type of recombination does not require homologous sequences and is important for the integration of viral genomes into bacterial chromosomes?
  1.    General recombination
  2.    Site-specific recombination
  3.    Mutagenic recombimation
  4.    Replicative recombination
 Discuss Question
Answer: Option B. -> Site-specific recombination
Question 17. What information can be generated by interrupted mating experiments?
  1.    DNA nucleotide sequences
  2.    Bacterial genome maps
  3.    Levels of DNA homology
  4.    Proteomics of the bacteria
 Discuss Question
Answer: Option B. -> Bacterial genome maps
Question 18. Diagnostic DNA probes have been developed for
  1.    Hepatitis B virus
  2.    Human immunodeficiency virus
  3.    All of these
  4.    Mycobacterium tuberculosis
 Discuss Question
Answer: Option C. -> All of these
Question 19. Which of the following statement(s) is/are true in regards to F+ x F- mating events?
  1.    No DNA is transferred because F- cells are unable to perform conjugation
  2.    DNA is transferred from F+ to F- cells
  3.    DNA is transferred from F- to F+ cells
  4.    No DNA is transferred because F+ cells are unable to perform conjugation
 Discuss Question
Answer: Option B. -> DNA is transferred from F+ to F- cells
Question 20. Which of the following transport bacterial DNA to other bacteria via bacteriophages?
  1.    Transduction
  2.    Transformation
  3.    Conjugation
  4.    Translation
 Discuss Question
Answer: Option A. -> Transduction

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