An Hfr microbial strain would best be described as:
A) any bacterium that readily takes up naked DNA through its membrane.
B) a bacterial strain with specific auxotrophic characteristics.
C) a bacterium containing a chromosomally integrated plasmid conferring mating competency.
D) a bacterium carrying an Hfr phage with membrane fusion competency.
E) a bacterium that lacks the histidine frequenase gene.
Correct Answer:
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Q5: A StrR mutant:
A)can grow in the presence
Q6: A gal- mutant:
A)can make its own galactose.
B)cannot
Q7: An Hfr strain of E.coli with the
Q8: Which of the following are characteristics of
Q9: An E.coli culture is growing in (rich)liquid
Q11: A bacterial strain is able to grow
Q12: A strain of E.coli has the genotype
Q13: A bacterium that is unable to grow
Q14: If a met-thr- Hfr strain is mated
Q15: A strain of E.coli with the genotype
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