Neisseria gonorrhoeae are present in the vaginal compartment with nonpathogenic commensal Neisseria spp. When the patient's system begins to attack the pathogenic species, some of the cells autolyze releasing their genetic material into the environment. Other Neisseria species are then capable of taking up the DNA from the organisms that have autolyzed altering their genetic makeup and changing
their pili protein structure. This process can be described as:
a. competent cells being transformed by ge-netic recombination.
b. bacteria ingesting DNA and using the in-formation for transcription.
c. mutation of the pathogenic organisms re-sulting in enhanced infection.
d. transformation and genetic recombination resulting in expression of new pili proteins to evade the immune system.
D
Neisseria species are one of the bacterial organisms that are competent and able to take up naked DNA from their environment via the mechanism of transformation. Once transformed with other DNA, the organisms are capable of incorporating that DNA into their chromosomes by genetic recombination resulting in the expression of altered pili proteins that are not recognized by the immune system until a new response is manifested.
You might also like to view...
Which of the following is NOT true about the eukaryotic cell cycle?
A. There are two stages to the cell cycle: M phase and interphase. B. The M phase consists of two events: mitosis and cytokinesis. C. Interphase is typically the shortest of the two stages of the cell cycle. D. There are three phases of interphase: the S phase and two gap phases. E. Some cells pause between M phase and S phase for more than a year. F. Some cells pause between the first gap phase and S phase for more than a year.
The carcinogenic compound ____, which damages kidneys and the nervous system, is produced by some strains of Aspergillus flavus.
Fill in the blank(s) with the appropriate word(s).
What three features define eusociality? (Check three.)
_____ colony resides in an enclosed hive or nest _____ cooperative brood care _____ haplodiploidy _____ insect species only _____ overlap of generations _____ reproductive division of labor _____ reproduction during a mating flight
Which of the following statements is true of selective toxicity?
A) Selective toxicity takes advantage of structural similarities between host and pathogen. B) To be effective, an antimicrobial agent must be more toxic to the patient than the pathogen. C) Selective toxicity takes advantage of differences in metabolic rates of the host and pathogen. D) Selective toxicity damages only pathogenic bacteria and not beneficial bacteria. E) Selective toxicity takes advantage of structural and/or metabolic differences between host and pathogen.