Microbial Genetics : USMLE step 1 , AIPGMEE , AIIMS MD/MS entrance Online Test

Plasmids are always present as a single copy per host cell.

Plasmids often confer antibiotic resistance on the bacteria that contain them.

Transposable elements are unable to cause mutations in the host cell

The transformation processes of all bacteria are identical.

DNA transformation involves the transfer of DNA via

The mismatch repair system will repair

When DNA from an ampicillin resistant organism is brought into an ampicillin sensitive organism by transformation and the product is grown on agar containing ampicillin

In transformation, both strands of donor DNA enter the recipient cell.

Donor DNA is combined with recipient DNA by homologous recombination.

A bacteriophage is a

When a bacteriophage carrying bacterial DNA infects a new bacterium

When a recipient bacterial cell receives bacterial DNA via transduction

A phage particle may carry pieces of bacterial DNA from one bacterium to another inside a viral protein coat.

Bacterial fragments from the donor bacterium may be integrated into the recipient bacterial chromosome

The F plasmid

The F pilus

When an F+ donor gives an F plasmid to an F- recipient

Contact is required between an F+ and an F- cell for conjugation to occur.

When F+ cells are mixed with F- cells, eventually all the cells will become F+.

HFr refers to

In conjugation of an HFr cell with an F- cell

In conjugation, the donor chromosome is transferred as

In conjugation of an HFr cell and an F- cell, the entire genome of the HFr cell is usually transferred to the recipient cell


After reading this chapter you should be able to:
discuss the nature of procaryotic recombination
distinguish horizontal gene transfer from vertical gene transfer
compare and contrast conjugation, transformation, and transduction
discuss how transposable elements can move genetic material between bacterial chromosomes and within a chromosome to cause changes in the genome and the phenotype of the organism
discuss the use of conjugation, transformation, and transduction to map the bacterial genome
discuss the methods used to map viral genes


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4048 days 20 hours 25 minutes ago

Satish Kumar

It is very effective and good test.keep it up

4050 days 3 hours 21 minutes ago

Satish Kumar

Transformation is the process in which bacteria take the nacked dna which is differ from conjugation

4050 days 3 hours 21 minutes ago

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