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Microbiology Objective Questions { Microbial Recombination and Gene Transfer }



8.  In lysogeny,
A.a bacteriophage transfers bacterial DNA
B.bacteria take up double stranded DNA from the environmen
C.DNA-degrading enzymes in the extracellular medium would stop the process
D.a bacteriophage genome is integrated into the bacterial genome
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9. A microarray differs from a gene fusion in that, it
A.carries DNA segments from many different genes
B.is not constructed by cloning
C.gives direct measurement of mRNA level
D.all of the above
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10. Who discovered transposons (jumping genes)?
A.Abelson
B.Harvey
C.McClintock
D.Griffith
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11. Which type of plasmid can exist with or without being integrated into the host's chromosome?
A.Medisome
B.Lisosome
C.Lysogen
D.Episome
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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
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13. Which of the following is the cause for drug resistance in tuberculosis?
A.Mutation
B.Transduction
C.Transformation
D.Conjugation
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14. The transposase gene encodes an enzyme that facilitate
A.viral replication within a genome
B.general recombination
C.site-specific integration of transposable elements
D.none of the above
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