What features are common to transformation, transduction, and conjugation?

1. transfer of genetic information is unidirectional.

2. there is a fusion of two haploid chromosomes.

3. recombination occurs by breakage and reunion.

4. gene transfer is usually incomplete.

5. following recombination, the recipient undergoes a meiotic division.

Gene transfer in bacteria by transformation has the following characteristic:

After phage infects Corynebacterium diphtheriae, the bacterium is capable of causing diphtheria. Which term is the best description of this phenomenon?

Transformation does not involve

Which of the following does not apply to conjugation?

Which of the following statements is false concerning a mating between F+ and F- cell?

In an Hfr strain

R plasmids are medically important because they

In conjugation, genes on the bacterial chromosome are most frequently transferred in matings between:

Interrupted mating experiments between Hfr and F- strains of E. coli have led to the following conclusions:

1. gene transfer is in a temporal order from F- to Hfr.

2. gene transfer is in a temporal order from Hfr to F-.

3. genes can be mapped by their time of entry.

4. all gene transfer occurs within 5 minutes of contact.

5. both strands of DNA are transferred during conjugation.

Plasmids may be functionally involved in all of the following except:

When a bacteriophage transfers bacterial DNA from one cell to another:

A transducing phage:

The gene LEAST likely to be transferred would be one on a

The exchange of homologous DNA molecules in general recombination requires

Plasmids can be separated from chromosomal DNA because there are differences in

An E. coli strain that requires the amino acid lysine for growth is termed a/an

The Ames test is a simple and cost-effective method to screen chemical agents that might be carcinogenic. The rationale behind the test is that