Spontaneous mutation Conjugation between closely related pathogenic and nonpathogenic bacteria, such as between E. coli and Shigella dysenteriae. Simultaneous infection of a host cell by 2 different strains of a virus with a segmented genome. Uptake of free soluble DNA from killed pathogens by living nonpathogenic microbes. Infection of a nonpathogenic bacterium by a temperate bacteriophage which introduces a gene for toxin production. Peptidoglycan is never found in eucaryotic cells.
Procaryotes have structurally different ribosomal subunits than eucaryotes.
Human cells can't synthesize folic acid but many microbes do. Synthetic analogs of purines or pyrimidines are selectively taken up during replication of procaryotic DNA but never during human DNA replication. Mark T or F beside each statement. Since a newly discovered bacterial species, Thiobacillus margarita, averages 0.5 millimeters in diameter, we can no longer say all bacteria are microbes. It is possible to benefit from an immunization to Rabies virus after the virus infects the human body because, unlike most pathogens, rabies virus remains localized for at least a week.