9. Match each item in the left column with the single most appropriate item in t
ID: 199617 • Letter: 9
Question
9. Match each item in the left column with the single most appropriate item in the right column. Each number should be used only once a. auxotroph b. conjugation C. Hfr d. transduction e. F' f. transformation 1. requires cell-to-cell contact 2. capable of taking up DNA 3. uptake of DNA from external medium 4. requires at least one nutrient for growth 5. F factor that has picked up a piece of the bacterial genome 6. E. coli strain with Ffactor integrated into bacterial genome 7. requires virus g. competent 10. Match each item in the left column with the single most appropriate item in the right column. Each number should be used only once a. pilus b. insertion sequence 2. group of 107-108 bacterial cells that are genetically identical c. nucleoid body d. capsule e. episome f. plasmid 1. contains bacterial chromosome 3. appendage by which a donor cell contacts a recipient cell 4. small, circular, double-stranded, piece of extrachromosomal DNA 5. thick, mucus-like coating around some bacterial cells 6. small, transposable elements that allow integration of F plasmid into host chromosome through homologous recombination 7. plasmid that can integrate into host chromosome g. colonyExplanation / Answer
9) a) 4 auxotrophs are the mutant organisms that require at least one nutrient for their growth
b) 1 because, conjugation is the process of genetic material transfer in bacteria by direct cell to cell contact.
c) 6 Hfr is the Ecoli strain with F factor integrated into bacterial genome.
d) 7 transduction requires virus.
e) 5 F factor that has picked up a part of bacterial genome.
f) 2 transformation is capable of taking up DNA.
g) 3 competent cells are capable of uptake of DNA from external medium.
10. a) 3 as pilus is an appendage by which a donor cell contacts a recipient cell during conjugation.
b) 6 insertion sequence are small, transposable elements that allow integration of F plasmid into host chromosome through homologous recombination.
c) 1 nucleoid body contains bacterial chromosome
d) 4 capsule is a thick, mucus -like coating around some bacterial cells.
e) 7 episomeis a plasmid that can integrate into host chromosome.
f) 4 plasmid is a small, circular, double stranded piece of extra chromosomal DNA
g) 2 colony is a group of 10^7-10^8 bacterial cells that are genetically identical.
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