Microbial Recombination and Gene Transfer – Section 1

11. Which type of plasmid can exist with or without being integrated into the host’s chromosome?

A. Medisome
B. Lysosome
C. Lysogen
D. Episome

Correct Answer: D. Episome

12. The main difference between a self-transmissible and a mobilizable plasmid is that the self-transmissible plasmid

A. transfers both strands of the plasmid DNA
B. carries genes encoding the mating apparatus
C. transfers antibiotic resistance genes
D. usually has a transposon inserted into it

Correct Answer: B. carries genes encoding the mating apparatus

13. Which of the following is the cause for drug resistance in tuberculosis?

A. Mutation
B. Transduction
C. Transformation
D. Conjugation

Correct Answer: A. Mutation

14. The transposase gene encodes an enzyme that facilitates

A. viral replication within a genome
B. general recombination
C. site-specific integration of transposable elements
D. none of the above

Correct Answer: C. site-specific integration of transposable elements

15. The term used for plasmids possessing both RTF and r determinants is

A. non-self-transmissible plasmids
B. non-conjugative plasmids
C. conjugative plasmids
D. none of the above

Correct Answer: C. conjugative plasmids

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